{"id":10972,"date":"2024-06-01T11:49:23","date_gmt":"2024-06-01T11:49:23","guid":{"rendered":"https:\/\/www.fambach.net\/?p=10972"},"modified":"2026-10-08T15:38:40","modified_gmt":"2026-10-08T15:38:40","slug":"ttl7402","status":"publish","type":"post","link":"https:\/\/www.fambach.net\/en\/ttl7402\/","title":{"rendered":"TTL IC 7402"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_89 ez-toc-wrap-left counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Contents\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Fakten\" >Facts<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Schaltzeichen_fur_NOR\" >Schaltzeichen f\u00fcr NOR<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#IC_Schaltplan\" >IC circuit diagram<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Zustandstabelle\" >State table<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Simulation\" >Simulation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Logiktester\" >Logic tester<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Datenblatt\" >Data sheet<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Anwendungsbereiche\" >Areas of application<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Ansichten\" >Views<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Schaltung\" >Circuit<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Test\" >Test<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Programm\" >Programme<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Probleme\" >Problems<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Im_Ruhezustand_ist_die_Rote_LED_aus\" >When idle, the red LED is off<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Sonstiges\" >Miscellaneous<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Andere_Logiken_mit_NOR_implementieren\" >Implementing other logic gates with NOR gates.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#NOT_Schaltung\" >NOT circuit<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#OR_Schaltung\" >OR circuit<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#AND_Schaltung\" >AND circuit<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#NAND_Schaltung\" >NAND gate<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#RS-FlipFlop\" >RS-FlipFlop<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#XNOR\" >XNOR<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#XOR\" >XOR<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Platine_gelotet\" >Platine gel\u00f6tet<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Fazit\" >Conclusion<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Verwandte_Beitrage\" >Related Posts<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Quellen\" >Sources<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Log\" >Log<\/a><\/li><\/ul><\/nav><\/div>\n\n<p class=\"wp-block-paragraph\">Der 7402 ist der zweite IC in meiner neuen TTL Serie. Er hat vier NOR Gatter mit jeweils zwei Eing\u00e4ngen. Man k\u00f6nnte sich nun fragen \u201eWo ist nach dem 7400 der 7401 geblieben?\u201c. Der 7401 ist baugleich mit dem 7400, nur dass er einen Open Collector verwendet. Auf die Open Collector Technik gehe ich evtl. in sp\u00e4teren Betrachtungen noch n\u00e4her ein.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"ub-content-link ub-content-link--unknown ub-content-link--status-after\"><a href=\"https:\/\/www.fambach.net\/en\/ttlerklaert\/\" data-type=\"post\" data-id=\"10909\" class=\"ub-content-link__anchor\">Was ist ein TTL IC?<\/a><span class=\"ub-status ub-status--unknown\" title=\"Link status: Unknown\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: Unknown<\/span><\/span><\/span><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"fakten\"><span class=\"ez-toc-section\" id=\"Fakten\"><\/span>Facts<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"schaltzeichen-fuer-nor\"><span class=\"ez-toc-section\" id=\"Schaltzeichen_fur_NOR\"><\/span>Schaltzeichen f\u00fcr NOR<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"629\" height=\"109\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-14_08_54.jpg\" alt=\"\" class=\"wp-image-11073\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-14_08_54.jpg 629w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-14_08_54-300x52.jpg 300w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-14_08_54-18x3.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">NOR Schaltzeichen \u2013  Quelle: <span class=\"ub-content-link ub-content-link--ok ub-content-link--status-after\"><a href=\"https:\/\/de.wikipedia.org\/wiki\/Logikgatter\" class=\"ub-content-link__anchor\">https:\/\/de.wikipedia.org\/wiki\/Logikgatter<\/a><span class=\"ub-status ub-status--ok\" title=\"Link status: OK\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: OK<\/span><\/span><\/span><\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"ic-schaltplan\"><span class=\"ez-toc-section\" id=\"IC_Schaltplan\"><\/span>IC circuit diagram<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">4 NAND gates and connections for the supply voltage.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"529\" height=\"387\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-03-21_01_23-1.jpg\" alt=\"\" class=\"wp-image-11135\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-03-21_01_23-1.jpg 529w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-03-21_01_23-1-300x219.jpg 300w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-03-21_01_23-1-16x12.jpg 16w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402 \u2013 Interne Beschaltung (Quelle: TTL-Taschenbuch)<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"zustandstabelle\"><span class=\"ez-toc-section\" id=\"Zustandstabelle\"><\/span>State table<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">NOR gate<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\" id=\"wpls-table-1\"><thead><tr><th>#<\/th><th>1\/2\/3\/4 A<\/th><th>1\/2\/3\/4 B<\/th><th>1\/4\/10\/13<\/th><\/tr><\/thead><tbody><tr><td>001<\/td><td>0<\/td><td>0<\/td><td>1<\/td><\/tr><tr><td>002<\/td><td>1<\/td><td>0<\/td><td>0<\/td><\/tr><tr><td>003<\/td><td>0<\/td><td>1<\/td><td>0  <\/td><\/tr><tr><td>004<\/td><td>1<\/td><td>1<\/td><td>0<\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\">Truth table NOR<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"simulation\"><span class=\"ez-toc-section\" id=\"Simulation\"><\/span>Simulation<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-2 is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"202\" height=\"93\" data-id=\"11022\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-09_54_24.jpg\" alt=\"\" class=\"wp-image-11022\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-09_54_24.jpg 202w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-09_54_24-200x93.jpg 200w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-09_54_24-18x8.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"203\" height=\"90\" data-id=\"11020\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-09_55_32.jpg\" alt=\"\" class=\"wp-image-11020\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-09_55_32.jpg 203w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-09_55_32-200x90.jpg 200w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-09_55_32-18x8.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"201\" height=\"91\" data-id=\"11023\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-09_55_15.jpg\" alt=\"\" class=\"wp-image-11023\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-09_55_15.jpg 201w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-09_55_15-18x8.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"201\" height=\"91\" data-id=\"11021\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-09_55_55.jpg\" alt=\"\" class=\"wp-image-11021\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-09_55_55.jpg 201w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-09_55_55-18x8.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><\/figure>\n<\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"logiktester\"><span class=\"ez-toc-section\" id=\"Logiktester\"><\/span>Logic tester<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Let's see if the existing IC works and is recognised.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"932\" height=\"647\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-05-28-08_31_36.jpg\" alt=\"\" class=\"wp-image-10981\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-05-28-08_31_36.jpg 932w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-05-28-08_31_36-300x208.jpg 300w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-05-28-08_31_36-768x533.jpg 768w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-05-28-08_31_36-18x12.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"datenblatt\"><span class=\"ez-toc-section\" id=\"Datenblatt\"><\/span>Data sheet<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">https:\/\/www.ti.com\/product\/de-de\/SN7402<\/p>\n\n\n\n<div data-wp-interactive=\"core\/file\" class=\"wp-block-file\"><object data-wp-bind--hidden=\"!state.hasPdfPreview\" hidden class=\"wp-block-file__embed\" data=\"https:\/\/www.fambach.net\/wp-content\/uploads\/sn7402.pdf#pagemode=none&amp;navpanes=0\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"Embed of sn7402.\"><\/object><a id=\"wp-block-file--media-6ccd3078-f5db-4cbe-9655-e5a780287bb7\" href=\"https:\/\/www.fambach.net\/wp-content\/uploads\/sn7402.pdf\">SN7402<\/a><a href=\"https:\/\/www.fambach.net\/wp-content\/uploads\/sn7402.pdf\" class=\"wp-block-file__button wp-element-button ub-status-button ub-status-button--ok\" download aria-describedby=\"wp-block-file--media-6ccd3078-f5db-4cbe-9655-e5a780287bb7\">Download<\/a><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"anwendungsbereiche\"><span class=\"ez-toc-section\" id=\"Anwendungsbereiche\"><\/span>Areas of application<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>1 aus N Ausschalter, sobald ein Eingang auf High ist, geht der Strom aus.<\/li>\n\n\n\n<li>In Computern Anfang der 60er bis ca. Ende der 90er <\/li>\n\n\n\n<li>Fenstersteuerung, zwei \u00d6ffner-Kontakte (oben und unten), wenn Fenster komplett ge\u00f6ffnet, beide  Eing\u00e4nge auf LOW, Ausgang High =&gt; WarnLED an.<\/li>\n\n\n\n<li>Inverter, inputs connected.<\/li>\n\n\n\n<li>Logical sequences<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"ansichten\"><span class=\"ez-toc-section\" id=\"Ansichten\"><\/span>Views<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-0 is-cropped wp-block-gallery-2 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"610\" height=\"287\" data-id=\"10984\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/7402_top.jpg\" alt=\"\" class=\"wp-image-10984\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/7402_top.jpg 610w, https:\/\/www.fambach.net\/wp-content\/uploads\/7402_top-300x141.jpg 300w, https:\/\/www.fambach.net\/wp-content\/uploads\/7402_top-18x8.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402 \u2013 4x NOR Gatter \u2013 Vorderseite<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.fambach.net\/en\/?attachment_id=10985\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"307\" data-id=\"10985\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/7402_bottom.jpg\" alt=\"\" class=\"wp-image-10985\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/7402_bottom.jpg 600w, https:\/\/www.fambach.net\/wp-content\/uploads\/7402_bottom-300x154.jpg 300w, https:\/\/www.fambach.net\/wp-content\/uploads\/7402_bottom-18x9.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><\/a><figcaption class=\"wp-element-caption\">7402 \u2013 4x NOR Gatter \u2013 R\u00fcckseite<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"schaltung\"><span class=\"ez-toc-section\" id=\"Schaltung\"><\/span>Circuit<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1083\" height=\"597\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-05-31-12_03_58.jpg\" alt=\"\" class=\"wp-image-11012\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-05-31-12_03_58.jpg 1083w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-05-31-12_03_58-300x165.jpg 300w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-05-31-12_03_58-1024x564.jpg 1024w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-05-31-12_03_58-768x423.jpg 768w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-05-31-12_03_58-18x10.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402 \u2013 Schaltplan Testschaltung mit NOR Gatter 4 (Zur Erstellung wurde <span class=\"ub-content-link ub-content-link--ok ub-content-link--status-after\"><a href=\"https:\/\/fritzing.org\/\" class=\"ub-content-link__anchor\">Fritzing <\/a><span class=\"ub-status ub-status--ok\" title=\"Link status: OK\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: OK<\/span><\/span><\/span>used)<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"694\" height=\"771\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-05-31-12_24_10.jpg\" alt=\"\" class=\"wp-image-11013\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-05-31-12_24_10.jpg 694w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-05-31-12_24_10-270x300.jpg 270w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-05-31-12_24_10-11x12.jpg 11w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402 \u2013 Steckanleitung Testschaltung mit NOR Gatter 4 (Zur Erstellung wurde <span class=\"ub-content-link ub-content-link--ok ub-content-link--status-after\"><a href=\"https:\/\/fritzing.org\/\" class=\"ub-content-link__anchor\">Fritzing <\/a><span class=\"ub-status ub-status--ok\" title=\"Link status: OK\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: OK<\/span><\/span><\/span>used)<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"test\"><span class=\"ez-toc-section\" id=\"Test\"><\/span>Test<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-2 is-cropped wp-block-gallery-3 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"325\" data-id=\"11018\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/NOR-Gatter-AL-BL-ZH1.jpg\" alt=\"\" class=\"wp-image-11018\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/NOR-Gatter-AL-BL-ZH1.jpg 600w, https:\/\/www.fambach.net\/wp-content\/uploads\/NOR-Gatter-AL-BL-ZH1-300x163.jpg 300w, https:\/\/www.fambach.net\/wp-content\/uploads\/NOR-Gatter-AL-BL-ZH1-18x10.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">NOR-Gatter \u2013 Beide Eing\u00e4nge auf LOW =&gt; Ausgang HIGH<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"324\" data-id=\"11016\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/NOR-Gatter-AH-BL-ZL.jpg\" alt=\"\" class=\"wp-image-11016\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/NOR-Gatter-AH-BL-ZL.jpg 600w, https:\/\/www.fambach.net\/wp-content\/uploads\/NOR-Gatter-AH-BL-ZL-300x162.jpg 300w, https:\/\/www.fambach.net\/wp-content\/uploads\/NOR-Gatter-AH-BL-ZL-18x10.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">NOR-Gatter \u2013 Eingang A auf HIGH, B auf LOW=&gt; Ausgang LOW<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"339\" data-id=\"11017\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/NOR-Gatter-AL-BH-ZL.jpg\" alt=\"\" class=\"wp-image-11017\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/NOR-Gatter-AL-BH-ZL.jpg 600w, https:\/\/www.fambach.net\/wp-content\/uploads\/NOR-Gatter-AL-BH-ZL-300x170.jpg 300w, https:\/\/www.fambach.net\/wp-content\/uploads\/NOR-Gatter-AL-BH-ZL-18x10.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">NOR-Gatter \u2013 Eingang A auf LOW, B auf HIGH=&gt; Ausgang LOW<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"324\" data-id=\"11015\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/NOR-Gatter-AH-BH-ZL.jpg\" alt=\"\" class=\"wp-image-11015\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/NOR-Gatter-AH-BH-ZL.jpg 600w, https:\/\/www.fambach.net\/wp-content\/uploads\/NOR-Gatter-AH-BH-ZL-300x162.jpg 300w, https:\/\/www.fambach.net\/wp-content\/uploads\/NOR-Gatter-AH-BH-ZL-18x10.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">NOR-Gatter \u2013 Beide Eing\u00e4nge auf HIGH =&gt; Ausgang LOW<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-4-3 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"TTL IC 7402 NOR Logic\" width=\"840\" height=\"630\" src=\"https:\/\/www.youtube.com\/embed\/V50-1EDPCw4?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><figcaption class=\"wp-element-caption\">NOR-Gatter \u2013 Video zu den Bildern<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"programm\"><span class=\"ez-toc-section\" id=\"Programm\"><\/span>Programme<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"\">OR function <br>*\/<br>bool or(bool e1, bool e2){<br>  if(e1 || e2){<br>    return true;<br>  } <br>  return false;<br>}<br><br>\/** not a function *\/<br>bool not(bool e1){<br>  return !e1;<br>}<br><br>\/** NOR function *\/<br>bool nor(bool e1, bool e2){<br>  return not (e1 or e2);<br>}<br><br>void main(){<br>  bool output1 = nor(true, true); <br>  \/\/ Some output <br>}<br><\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"probleme\"><span class=\"ez-toc-section\" id=\"Probleme\"><\/span>Problems<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"im-ruhezustand-ist-die-rote-led-aus\"><span class=\"ez-toc-section\" id=\"Im_Ruhezustand_ist_die_Rote_LED_aus\"><\/span>When idle, the red LED is off<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Nicht alle ICs ziehen automatisch die Eing\u00e4nge auf Masse, um das Problem zu beheben, m\u00fcssen Pulldown-Widerst\u00e4nde zwischen dem Eingang und Masse geschaltet werden. 1kOhm ist OK, kann auch mehr sein.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"sonstiges\"><span class=\"ez-toc-section\" id=\"Sonstiges\"><\/span>Miscellaneous<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"andere-logiken-mit-nor-implementieren\"><span class=\"ez-toc-section\" id=\"Andere_Logiken_mit_NOR_implementieren\"><\/span>Implementing other logic gates with NOR gates.<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The 7402 quad NOR gate is also very flexible, just like the 7400, and can implement all basic logic circuits.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"not-schaltung\"><span class=\"ez-toc-section\" id=\"NOT_Schaltung\"><\/span>NOT circuit<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">F\u00fcr eine NOT Schaltung werden zwei Eing\u00e4nge eines NOR Gatters verbunden. Zum Beispiel verbindet man Pin 11 und 12, das anliegende Eingangssignal wird dann invertiert am Ausgang 13 ausgegeben.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\" id=\"wpls-table-2\"><thead><tr><th>Eingang 4A (11)<\/th><th>Eingang 4B (12)<\/th><th>Ausgang 4Y (13)<\/th><\/tr><\/thead><tbody><tr><td>1<\/td><td>=A<\/td><td>0<\/td><\/tr><tr><td>0<\/td><td>=A<\/td><td>1<\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\">7402 \u2013 Gatter Eingang A und B verbunden =&gt; NOT Gatter<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-4 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"211\" height=\"101\" data-id=\"11025\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-09_59_20.jpg\" alt=\"\" class=\"wp-image-11025\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-09_59_20.jpg 211w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-09_59_20-18x9.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402- NOT Schaltung Eingang LOW, Ausgang HIGH<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"201\" height=\"101\" data-id=\"11024\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-09_59_43.jpg\" alt=\"\" class=\"wp-image-11024\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-09_59_43.jpg 201w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-09_59_43-18x9.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402- NOT Schaltung Eingang HIGH, Ausgang LOW<\/figcaption><\/figure>\n<figcaption class=\"blocks-gallery-caption wp-element-caption\">7402 \u2013 NOT Schaltung<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"or-schaltung\"><span class=\"ez-toc-section\" id=\"OR_Schaltung\"><\/span>OR circuit<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">For the OR circuit, two gates are needed, one wired as a NOR and one as a NOT.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table id=\"wpls-table-3\"><thead><tr><th>#<\/th><th>A<\/th><th>B<\/th><th>C<\/th><th>D<\/th><\/tr><\/thead><tbody><tr><td>1<\/td><td>0<\/td><td>0<\/td><td>1<\/td><td>0<\/td><\/tr><tr><td>2<\/td><td>1<\/td><td>0<\/td><td>1<\/td><td>1<\/td><\/tr><tr><td>3<\/td><td>0<\/td><td>1<\/td><td>1<\/td><td>1<\/td><\/tr><tr><td>4<\/td><td>1<\/td><td>1<\/td><td>0<\/td><td>1<\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\">Truth table OR circuit<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-2 is-cropped wp-block-gallery-5 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"291\" height=\"91\" data-id=\"11029\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_00_31.jpg\" alt=\"\" class=\"wp-image-11029\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_00_31.jpg 291w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_00_31-18x6.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402 - OR gate, both inputs LOW, output LOW<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"291\" height=\"91\" data-id=\"11028\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_00_57.jpg\" alt=\"\" class=\"wp-image-11028\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_00_57.jpg 291w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_00_57-18x6.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402- Input A HIGH, B LOW Output HIGH<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"291\" height=\"93\" data-id=\"11027\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_01_23.jpg\" alt=\"\" class=\"wp-image-11027\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_01_23.jpg 291w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_01_23-18x6.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402- Input A LOW, B HIGH Output HIGH<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"291\" height=\"91\" data-id=\"11026\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_01_48.jpg\" alt=\"\" class=\"wp-image-11026\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_01_48.jpg 291w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_01_48-18x6.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402 - OR gate, both inputs HIGH, output HIGH<\/figcaption><\/figure>\n<figcaption class=\"blocks-gallery-caption wp-element-caption\">7402 - OR circuit <\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"and-schaltung\"><span class=\"ez-toc-section\" id=\"AND_Schaltung\"><\/span>AND circuit<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">This circuit already needs three gates.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table id=\"wpls-table-4\"><thead><tr><th>#<\/th><th>A<\/th><th>B<\/th><th>A<\/th><th>!B<\/th><th>Z<\/th><\/tr><\/thead><tbody><tr><td>1<\/td><td>0<\/td><td>0<\/td><td>1<\/td><td>1<\/td><td>0<\/td><\/tr><tr><td>2<\/td><td>1<\/td><td>0<\/td><td>0<\/td><td>1<\/td><td>0<\/td><\/tr><tr><td>3<\/td><td>0<\/td><td>1<\/td><td>1<\/td><td>0<\/td><td>0<\/td><\/tr><tr><td>4<\/td><td>1<\/td><td>1<\/td><td>0<\/td><td>0<\/td><td>1<\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\">Truth table AND circuit<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-2 is-cropped wp-block-gallery-6 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"321\" height=\"141\" data-id=\"11034\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_02_25.jpg\" alt=\"\" class=\"wp-image-11034\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_02_25.jpg 321w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_02_25-300x132.jpg 300w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_02_25-18x8.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402- AND Schaltung beide Eing\u00e4nge LOW, Ausgang LOW<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"331\" height=\"141\" data-id=\"11033\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_02_46.jpg\" alt=\"\" class=\"wp-image-11033\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_02_46.jpg 331w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_02_46-300x128.jpg 300w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_02_46-18x8.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402- AND Schaltung Eingang A HIGH, B LOW, Ausgang LOW<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"331\" height=\"141\" data-id=\"11032\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_03_10.jpg\" alt=\"\" class=\"wp-image-11032\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_03_10.jpg 331w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_03_10-300x128.jpg 300w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_03_10-18x8.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402- AND Schaltung Eingang A LOW, B HIGH, Ausgang LOW<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"331\" height=\"141\" data-id=\"11031\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_03_35.jpg\" alt=\"\" class=\"wp-image-11031\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_03_35.jpg 331w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_03_35-300x128.jpg 300w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_03_35-18x8.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402- AND Schaltung beide Eing\u00e4nge HIGH, Ausgang HIGH<\/figcaption><\/figure>\n<figcaption class=\"blocks-gallery-caption wp-element-caption\">NOR \u2013 AND Schaltung<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"nand-schaltung\"><span class=\"ez-toc-section\" id=\"NAND_Schaltung\"><\/span>NAND gate<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">This circuit requires four gates and therefore an entire IC.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table id=\"wpls-table-5\"><thead><tr><th>#<\/th><th>A<\/th><th>B<\/th><th>A<\/th><th>!B<\/th><th>Y<\/th><th>Z<\/th><\/tr><\/thead><tbody><tr><td>1<\/td><td>0<\/td><td>0<\/td><td>1<\/td><td>1<\/td><td>0<\/td><td>1<\/td><\/tr><tr><td>2<\/td><td>1<\/td><td>0<\/td><td>0<\/td><td>1<\/td><td>0<\/td><td>1<\/td><\/tr><tr><td>3<\/td><td>0<\/td><td>1<\/td><td>1<\/td><td>0<\/td><td>0<\/td><td>1<\/td><\/tr><tr><td>4<\/td><td>1<\/td><td>1<\/td><td>0<\/td><td>0<\/td><td>1<\/td><td>0<\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\">NAND gate truth table<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-2 is-cropped wp-block-gallery-7 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"461\" height=\"141\" data-id=\"11039\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_04_00.jpg\" alt=\"\" class=\"wp-image-11039\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_04_00.jpg 461w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_04_00-300x92.jpg 300w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_04_00-18x6.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402 NAND gate, both inputs LOW, output HIGH<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"461\" height=\"141\" data-id=\"11038\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_04_26.jpg\" alt=\"\" class=\"wp-image-11038\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_04_26.jpg 461w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_04_26-300x92.jpg 300w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_04_26-18x6.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402 - NAND gate, input A HIGH, B LOW, output HIGH<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"461\" height=\"141\" data-id=\"11037\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_04_47.jpg\" alt=\"\" class=\"wp-image-11037\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_04_47.jpg 461w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_04_47-300x92.jpg 300w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_04_47-18x6.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402 - NAND gate, input A LOW, B HIGH, output HIGH<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"460\" height=\"141\" data-id=\"11036\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_05_08.jpg\" alt=\"\" class=\"wp-image-11036\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_05_08.jpg 460w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_05_08-300x92.jpg 300w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_05_08-18x6.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402 \u2013 NAND Schaltung beide Eing\u00e4nge HIGH, Ausgang LOW<\/figcaption><\/figure>\n<figcaption class=\"blocks-gallery-caption wp-element-caption\">7402 - NAND Gate<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"rs-flipflop\"><span class=\"ez-toc-section\" id=\"RS-FlipFlop\"><\/span>RS-FlipFlop<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Mit den NOR Gattern ben\u00f6tigt man nur zwei Gatter, somit kann man mit einem IC gleich zwei Bit speichern. Beim NOR Gatter RS-FlipFlop sind die Ausg\u00e4nge Q und !Q (nicht Q) vertauscht.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Durch die R\u00fcckkopplung muss immer der Vorg\u00e4nger Zustand mit betrachtet werden. Zum Beispiel wurde Set auf HIGH gesetzt und dann wieder auf LOW, bleibt Q1 HIGH.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table id=\"wpls-table-6\"><thead><tr><th>#<\/th><th>S<\/th><th>R<\/th><th>!S<\/th><th>!R<\/th><th>Q1<\/th><th>!Q1<\/th><th>Explanation<\/th><\/tr><\/thead><tbody><tr><td>1<\/td><td>0<\/td><td>0<\/td><td>1<\/td><td>1<\/td><td>*<\/td><td>*<\/td><td>Initial state<\/td><\/tr><tr><td>2<\/td><td>1<\/td><td>0<\/td><td>0<\/td><td>1<\/td><td>1<\/td><td>0<\/td><td>Set to HIGH<\/td><\/tr><tr><td>3<\/td><td>0<\/td><td>0<\/td><td>1<\/td><td>1<\/td><td>1<\/td><td>0<\/td><td>Set saved<\/td><\/tr><tr><td>4<\/td><td>0<\/td><td>1<\/td><td>1<\/td><td>0<\/td><td>0<\/td><td>1<\/td><td>Reset auf HIGH<\/td><\/tr><tr><td>5<\/td><td>0<\/td><td>0<\/td><td>1<\/td><td>1<\/td><td>0<\/td><td>1<\/td><td>Reset saved<\/td><\/tr><tr><td>6 <\/td><td>1<\/td><td>1<\/td><td>0<\/td><td>0<\/td><td>1<\/td><td>1<\/td><td>Unacceptable condition<\/td><\/tr><tr><td>7<\/td><td>0<\/td><td>1<\/td><td>1<\/td><td>0<\/td><td>0<\/td><td>1<\/td><td>Reset wird gew\u00e4hlt<\/td><\/tr><tr><td>8<\/td><td>0<\/td><td>0<\/td><td>1<\/td><td>1<\/td><td>0<\/td><td>1<\/td><td>Reset saved<\/td><\/tr><tr><td>9<\/td><td>1<\/td><td>1<\/td><td>0<\/td><td>0<\/td><td>1<\/td><td>1<\/td><td>Unacceptable condition (2)<\/td><\/tr><tr><td>10<\/td><td>1<\/td><td>0<\/td><td>0<\/td><td>1<\/td><td>1<\/td><td>0<\/td><td>The set is chosen<\/td><\/tr><tr><td>11<\/td><td>0<\/td><td>0<\/td><td>1<\/td><td>1<\/td><td>1<\/td><td>0<\/td><td>Zustand gespeichert<\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\">7402 - RS Flip-Flop Truth Table Circuit<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Zustand 6, beide Eing\u00e4nge auf HIGH, ist unzul\u00e4ssig. Der weitere Verlauf h\u00e4ngt davon ab, welcher der beiden Eing\u00e4nge zuerst auf LOW gesetzt wird. Dies f\u00fchrt dazu, dass der jeweils andere z\u00e4hlt. Wird S zuerst auf LOW gesetzt, z\u00e4hlt der R Eingang, somit ist !Q1 aktiv. Im umgekehrten Fall wird R zuerst auf LOW gesetzt, dann z\u00e4hlt der S Eingang und Q1 ist aktiv. <\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-2 is-cropped wp-block-gallery-8 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"241\" height=\"161\" data-id=\"11043\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_05_38.jpg\" alt=\"\" class=\"wp-image-11043\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_05_38.jpg 241w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_05_38-18x12.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402- RS FlipFlop beide Eing\u00e4nge auf LOW, beide Ausg\u00e4nge nicht definiert<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"231\" height=\"161\" data-id=\"11042\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_06_14.jpg\" alt=\"\" class=\"wp-image-11042\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_06_14.jpg 231w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_06_14-18x12.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402 - RS Flip-Flop, Set input HIGH, Q output HIGH<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"231\" height=\"161\" data-id=\"11041\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_06_38.jpg\" alt=\"\" class=\"wp-image-11041\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_06_38.jpg 231w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_06_38-18x12.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402- RS FlipFlop Set input LOW, output Q HIGH (stored)<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"231\" height=\"161\" data-id=\"11040\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_07_07.jpg\" alt=\"\" class=\"wp-image-11040\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_07_07.jpg 231w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_07_07-18x12.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402 - RS flip-flop reset input HIGH, output !Q HIGH<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"241\" height=\"161\" data-id=\"11044\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_45_45.jpg\" alt=\"\" class=\"wp-image-11044\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_45_45.jpg 241w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_45_45-18x12.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402 - RS Flip-Flop Reset input LOW, output !Q HIGH (stored)<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"241\" height=\"161\" data-id=\"11045\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_47_10.jpg\" alt=\"\" class=\"wp-image-11045\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_47_10.jpg 241w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_47_10-18x12.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402 - RS Flip-Flop, both inputs HIGH, both outputs HIGH, invalid state.<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"xnor\"><span class=\"ez-toc-section\" id=\"XNOR\"><\/span>XNOR<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Der Ausgang ist immer HIGH, wenn die Eing\u00e4nge gleiches Potential haben (A=B= LOW od. A=B=HIGH). F\u00fcr diese Schaltung ben\u00f6tigt man mehr als nur ein IC.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table id=\"wpls-table-7\"><thead><tr><th>#<\/th><th>A<\/th><th>B<\/th><th>A<\/th><th>!B<\/th><th>C<\/th><th>D<\/th><th>Z<\/th><\/tr><\/thead><tbody><tr><td>1<\/td><td>0<\/td><td>0<\/td><td>1<\/td><td>1<\/td><td>0<\/td><td>0<\/td><td>1<\/td><\/tr><tr><td>2<\/td><td>1<\/td><td>0<\/td><td>0<\/td><td>1<\/td><td>1<\/td><td>0<\/td><td>0<\/td><\/tr><tr><td>3<\/td><td>0<\/td><td>1<\/td><td>1<\/td><td>0<\/td><td>0<\/td><td>1<\/td><td>0<\/td><\/tr><tr><td>4<\/td><td>1<\/td><td>1<\/td><td>0<\/td><td>0<\/td><td>0<\/td><td>0<\/td><td>1<\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\">XNOR circuit truth table<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-2 is-cropped wp-block-gallery-9 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"411\" height=\"181\" data-id=\"11049\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_08_11.jpg\" alt=\"\" class=\"wp-image-11049\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_08_11.jpg 411w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_08_11-300x132.jpg 300w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_08_11-18x8.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">XNOR circuit, both inputs LOW, output HIGH<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"411\" height=\"181\" data-id=\"11046\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_08_50.jpg\" alt=\"\" class=\"wp-image-11046\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_08_50.jpg 411w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_08_50-300x132.jpg 300w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_08_50-18x8.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402- XNOR gate, input A HIGH, B LOW, output LOW<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"411\" height=\"181\" data-id=\"11047\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_09_12.jpg\" alt=\"\" class=\"wp-image-11047\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_09_12.jpg 411w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_09_12-300x132.jpg 300w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_09_12-18x8.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402- XNOR gate, input A HIGH, B LOW, output LOW<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"411\" height=\"181\" data-id=\"11048\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_09_34.jpg\" alt=\"\" class=\"wp-image-11048\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_09_34.jpg 411w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_09_34-300x132.jpg 300w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_09_34-18x8.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402- XNOR Schaltung, beide Eing\u00e4nge HIGH, Ausgang HIGH<\/figcaption><\/figure>\n<figcaption class=\"blocks-gallery-caption wp-element-caption\">7402 \u2013 XNOR Schaltung<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"xor\"><span class=\"ez-toc-section\" id=\"XOR\"><\/span>XOR<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Beim XOR ist der Ausgang HIGH, wenn die Eing\u00e4nge unterschiedlich sind. F\u00fcr diese Schaltung ben\u00f6tigt man schon 1,5 ICs.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table id=\"wpls-table-8\"><thead><tr><th>#<\/th><th>A<\/th><th>B<\/th><th>A<\/th><th>!B<\/th><th>C<\/th><th>D<\/th><th>Z<\/th><th>!Z<\/th><\/tr><\/thead><tbody><tr><td>1<\/td><td>0<\/td><td>0<\/td><td>1<\/td><td>0<\/td><td>0<\/td><td>0<\/td><td>1<\/td><td>0<\/td><\/tr><tr><td>2<\/td><td>1<\/td><td>0<\/td><td>0<\/td><td>0<\/td><td>1<\/td><td>0<\/td><td>0<\/td><td>1<\/td><\/tr><tr><td>3<\/td><td>0<\/td><td>1<\/td><td>1<\/td><td>1<\/td><td>0<\/td><td>1<\/td><td>0<\/td><td>1<\/td><\/tr><tr><td>4<\/td><td>1<\/td><td>1<\/td><td>0<\/td><td>1<\/td><td>0<\/td><td>0<\/td><td>1<\/td><td>0<\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\">XOR Circuit Truth Table<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-2 is-cropped wp-block-gallery-10 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"501\" height=\"181\" data-id=\"11054\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_09_57.jpg\" alt=\"\" class=\"wp-image-11054\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_09_57.jpg 501w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_09_57-300x108.jpg 300w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_09_57-18x7.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402 - XOR gate, both inputs LOW, output LOW<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"501\" height=\"181\" data-id=\"11053\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_10_17.jpg\" alt=\"\" class=\"wp-image-11053\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_10_17.jpg 501w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_10_17-300x108.jpg 300w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_10_17-18x7.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402- XOR Schaltung Eingang A HIGH, B LOW Ausgang HIGH<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"501\" height=\"181\" data-id=\"11052\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_10_34.jpg\" alt=\"\" class=\"wp-image-11052\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_10_34.jpg 501w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_10_34-300x108.jpg 300w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_10_34-18x7.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402- XOR Schaltung Eingang A LOW B HIGH, Ausgang HIGH<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"501\" height=\"181\" data-id=\"11051\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_10_54.jpg\" alt=\"\" class=\"wp-image-11051\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_10_54.jpg 501w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_10_54-300x108.jpg 300w, https:\/\/www.fambach.net\/wp-content\/uploads\/2024-06-01-10_10_54-18x7.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402 - XOR circuit, both inputs high, output low<\/figcaption><\/figure>\n<figcaption class=\"blocks-gallery-caption wp-element-caption\">NOR \u2013 XOR Schaltung<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"platine-geloetet\"><span class=\"ez-toc-section\" id=\"Platine_gelotet\"><\/span>Platine gel\u00f6tet<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Nachdem ich bei dem 7400 erstmal wieder in die Thematik reinkommen musste, ging es jetzt beim 7402 schon viel schneller. Dennoch habe ich noch einen Denkfehler gemacht, man beachte die L\u00f6tbr\u00fccke rechts unten die von einem Widerstand gekreuzt wird. Die untere Pinleiste ist nicht angeschlossen, das habe ich mir erstmal gespart, ich h\u00e4tte diese direkt an den IC setzen sollen.  Die Jumper trennen die Taster und LEDs vom IC, sollten andere Schaltungen gesteckt werden. Die Pins sind zum Verbinden der anderen Gatter. Ich habe zwei Widerst\u00e4nde eingespart indem ich die LED in Reihe zu den Pulldown Widerst\u00e4nden geschaltet habe. Die 4,5v Versorgungsspannung  \u2013 1,5V Diodenspannung sind noch \u00fcber 2,4V und somit ein HIGH ;).<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"ansicht\">View<\/h4>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-1 is-cropped wp-block-gallery-11 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"293\" data-id=\"11085\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/7402PlatineVorderseite.jpg\" alt=\"\" class=\"wp-image-11085\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/7402PlatineVorderseite.jpg 600w, https:\/\/www.fambach.net\/wp-content\/uploads\/7402PlatineVorderseite-300x147.jpg 300w, https:\/\/www.fambach.net\/wp-content\/uploads\/7402PlatineVorderseite-18x9.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402 L\u00f6tplatine \u2013 Frontseite <\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"289\" data-id=\"11083\" src=\"https:\/\/www.fambach.net\/wp-content\/uploads\/7402PlatineRueckseite.jpg\" alt=\"\" class=\"wp-image-11083\" srcset=\"https:\/\/www.fambach.net\/wp-content\/uploads\/7402PlatineRueckseite.jpg 600w, https:\/\/www.fambach.net\/wp-content\/uploads\/7402PlatineRueckseite-300x145.jpg 300w, https:\/\/www.fambach.net\/wp-content\/uploads\/7402PlatineRueckseite-18x9.jpg 18w\" sizes=\"auto, (max-width: 599px) calc(100vw - 50px), (max-width: 767px) calc(100vw - 70px), (max-width: 991px) 429px, (max-width: 1199px) 637px, 354px\"><figcaption class=\"wp-element-caption\">7402 L\u00f6tplatine \u2013 R\u00fcckseite<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"materialliste-bom\">Materialliste<\/h4>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table id=\"wpls-table-9\"><thead><tr><th>Component<\/th><th>Number<\/th><\/tr><\/thead><tbody><tr><td>LED Gr\u00fcn\/Gelb\/Rot (k\u00f6nnen auch die gleiche Farbe haben)<\/td><td>3<\/td><\/tr><tr><td>Jumper (Red, Green, and Yellow correspond to the selected LED colours)<\/td><td>3<\/td><\/tr><tr><td>2 straight Polig pins<\/td><td>3<\/td><\/tr><tr><td>2 Polig Pins abgewinkelt f\u00fcr die Stromversorgung<\/td><td>1<\/td><\/tr><tr><td>7-pin plug for additional connections <\/td><td>3<\/td><\/tr><tr><td>Taster mit langem Dr\u00fccker<\/td><td>2<\/td><\/tr><tr><td>1K Widerstand (Pulldown\/Vorwiderstand f\u00fcr LED)<\/td><td>3<\/td><\/tr><tr><td>14-pin IC socket<\/td><td>1<\/td><\/tr><tr><td>Silberdraht f\u00fcr die Verbindungen auf der R\u00fcckseite<\/td><td>?<\/td><\/tr><tr><td>Solder<\/td><td>? <\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\">7402 Solder board material list<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"fazit\"><span class=\"ez-toc-section\" id=\"Fazit\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Der 7402 ist nicht weniger faszinierend als der 7400. Beim RS FlipFlop hat er einen klaren Vorteil, hier lassen sich gleich 2 Bit in einem IC speichern. Auch wenn das f\u00fcr heutige Speicherchips verschwindend gering ist, stellt dies die Basis f\u00fcr alle neuen Techniken dar. <\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"verwandte-beitraege\"><span class=\"ez-toc-section\" id=\"Verwandte_Beitrage\"><\/span>Related Posts<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n<ul class=\"display-posts-listing\"><li class=\"listing-item\"><span class=\"ub-content-link ub-content-link--ok ub-content-link--status-after\"><a class=\"title ub-content-link__anchor\" href=\"https:\/\/www.fambach.net\/en\/ttl7402\/\">TTL IC 7402<\/a><span class=\"ub-status ub-status--ok\" title=\"Link status: OK\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: OK<\/span><\/span><\/span><\/li><li class=\"listing-item\"><span class=\"ub-content-link ub-content-link--ok ub-content-link--status-after\"><a class=\"title ub-content-link__anchor\" href=\"https:\/\/www.fambach.net\/en\/ttlerklaert\/\">TTL \u2013 Transistor Transistor Logik IC\u2019s<\/a><span class=\"ub-status ub-status--ok\" title=\"Link status: OK\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: OK<\/span><\/span><\/span><\/li><li class=\"listing-item\"><span class=\"ub-content-link ub-content-link--ok ub-content-link--status-after\"><a class=\"title ub-content-link__anchor\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/\">TTL IC 7400<\/a><span class=\"ub-status ub-status--ok\" title=\"Link status: OK\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: OK<\/span><\/span><\/span><\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"quellen\"><span class=\"ez-toc-section\" id=\"Quellen\"><\/span>Sources<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"ub-content-link ub-content-link--ok ub-content-link--status-after\"><a href=\"https:\/\/de.wikipedia.org\/wiki\/7402\" class=\"ub-content-link__anchor\">https:\/\/de.wikipedia.org\/wiki\/7402<\/a><span class=\"ub-status ub-status--ok\" title=\"Link status: OK\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: OK<\/span><\/span><\/span><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"ub-content-link ub-content-link--ok ub-content-link--status-after\"><a href=\"https:\/\/logigator.com\/editor\" class=\"ub-content-link__anchor\">https:\/\/logigator.com\/editor<\/a><span class=\"ub-status ub-status--ok\" title=\"Link status: OK\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: OK<\/span><\/span><\/span><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"ub-content-link ub-content-link--ok ub-content-link--status-after\"><a href=\"https:\/\/sourceforge.net\/projects\/circuit\" class=\"ub-content-link__anchor\">https:\/\/sourceforge.net\/projects\/circuit<\/a><span class=\"ub-status ub-status--ok\" title=\"Link status: OK\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: OK<\/span><\/span><\/span> (Logic Sim, I use it for my drawings)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"ub-content-link ub-content-link--ok ub-content-link--status-after\"><a href=\"https:\/\/fritzing.org\" target=\"_blank\" rel=\"noreferrer noopener\" class=\"ub-content-link__anchor\">Fritzing Circuit Diagram Tool<\/a><span class=\"ub-status ub-status--ok\" title=\"Link status: OK\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: OK<\/span><\/span><\/span><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"ub-content-link ub-content-link--ok ub-content-link--status-after\"><a href=\"http:\/\/www.cburch.com\/logisim\/de\/index.html\" class=\"ub-content-link__anchor\">LogiSim \u2013 Schaltungssimulator<\/a><span class=\"ub-status ub-status--ok\" title=\"Link status: OK\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: OK<\/span><\/span><\/span><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"ub-content-link ub-content-link--ok ub-content-link--status-after\"><a href=\"https:\/\/archive.org\/details\/das_ttl_kochbuch\/\" class=\"ub-content-link__anchor\">TTL Cookbook<\/a><span class=\"ub-status ub-status--ok\" title=\"Link status: OK\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: OK<\/span><\/span><\/span><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"ub-content-link ub-content-link--ok ub-content-link--status-after\"><a href=\"https:\/\/www.elektronik-kompendium.de\/service\/ttlcode.php\" class=\"ub-content-link__anchor\">TTL Code Database<\/a><span class=\"ub-status ub-status--ok\" title=\"Link status: OK\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: OK<\/span><\/span><\/span><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"ub-content-link ub-content-link--ok ub-content-link--status-after\"><a href=\"https:\/\/www.elektronik-kompendium.de\" class=\"ub-content-link__anchor\">https:\/\/www.elektronik-kompendium.de<\/a><span class=\"ub-status ub-status--ok\" title=\"Link status: OK\"><span class=\"ub-status__icon\" aria-hidden=\"true\">\u25cf<\/span><span class=\"screen-reader-text\">Link status: OK<\/span><\/span><\/span><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"log\"><span class=\"ez-toc-section\" id=\"Log\"><\/span>Log<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>","protected":false},"excerpt":{"rendered":"<p>The 7402 IC comprises 4 NOR gates, each with two inputs. It is as versatile as its cousin, the 7400.<\/p>\n<a href=\"https:\/\/www.fambach.net\/en\/ttl7400\/\" class=\"read-more-link\">Carry on reading <span class=\"screen-reader-text\">\"TTL IC 7400\"<\/span> <span class=\"meta-nav\">\u2192<\/span><\/a>","protected":false},"author":1,"featured_media":10986,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","footnotes":""},"categories":[785],"tags":[788,787,283,786],"class_list":["post-10972","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-785","tag-chip","tag-ic","tag-logic","tag-ttl","penguin-post","penguin-post-not-sticky"],"modified_by":"sfambach","_links":{"self":[{"href":"https:\/\/www.fambach.net\/en\/wp-json\/wp\/v2\/posts\/10972","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fambach.net\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fambach.net\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fambach.net\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fambach.net\/en\/wp-json\/wp\/v2\/comments?post=10972"}],"version-history":[{"count":34,"href":"https:\/\/www.fambach.net\/en\/wp-json\/wp\/v2\/posts\/10972\/revisions"}],"predecessor-version":[{"id":18457,"href":"https:\/\/www.fambach.net\/en\/wp-json\/wp\/v2\/posts\/10972\/revisions\/18457"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.fambach.net\/en\/wp-json\/wp\/v2\/media\/10986"}],"wp:attachment":[{"href":"https:\/\/www.fambach.net\/en\/wp-json\/wp\/v2\/media?parent=10972"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fambach.net\/en\/wp-json\/wp\/v2\/categories?post=10972"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fambach.net\/en\/wp-json\/wp\/v2\/tags?post=10972"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}