{"id":10972,"date":"2024-06-01T11:49:23","date_gmt":"2024-06-01T11:49:23","guid":{"rendered":"https:\/\/www.fambach.net\/?p=10972"},"modified":"2024-06-03T19:15:51","modified_gmt":"2024-06-03T19:15:51","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_85 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-1'><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-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Schaltzeichen_fur_NAND\" >Schaltzeichen f&uuml;r NAND<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Schaltplan\" >Schematic<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Wahrheitstabelle\" >Truth table<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Logiktester\" >Logic tester<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Datenblatt\" >Data sheet<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Anwendungsbereiche\" >Areas of application<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Ansichten\" >Views<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Schaltung\" >Circuit<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Test\" >Test<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Programm\" >Programme<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Probleme\" >Problems<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" 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-1'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Sonstiges\" >Miscellaneous<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#NOT_Schaltung\" >NOT circuit<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#AND_Schaltung\" >AND circuit<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#OR_Schaltung\" >OR circuit<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#NOR_Schaltung\" >OR gate<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#RS-FlipFlop\" >RS-FlipFlop<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#XNOR\" >XNOR<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#XOR\" >XOR<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Platine_Gelotet\" >Platine Gel&ouml;tet<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Ansicht\" >View<\/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\/#Materialliste_BOM\" >Materialliste<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><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-1'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/#Verwandte_Beitrage\" >Verwandte Beitr&auml;ge<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><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-1'><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&auml;ngen. Man k&ouml;nnte sich nun fragen &#8222;Wo ist nach dem 7400 der 7401 geblieben?&#8220;. Der 7401 ist Baugleich mit dem 7400 nur dass er einen Open Collector verwendet. Auf die Open Collector Technik gehe ich evtl. in sp&auml;teren Betrachtungen noch n&auml;her ein.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.fambach.net\/en\/ttlerklaert\/\" data-type=\"post\" data-id=\"10909\">Was ist ein TTL IC?<\/a><\/p>\n\n\n\n<h1 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Fakten\"><\/span>Facts<span class=\"ez-toc-section-end\"><\/span><\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Schaltzeichen f&uuml;r NOR<\/h2>\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\"><figcaption class=\"wp-element-caption\">NOR Logic Gate Symbol \u2013 Source: <a href=\"https:\/\/de.wikipedia.org\/wiki\/Logikgatter\">https:\/\/de.wikipedia.org\/wiki\/Logikgatter<\/a><\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">IC circuit diagram<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">4 NOR-Gatter sowie Anschl&uuml;sse f&uuml;r die Versorgungsspannung.<\/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\"><figcaption class=\"wp-element-caption\">7402 \u2013 Internal circuitry (Source: TTL Handbook)<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">State table<\/h2>\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<h2 class=\"wp-block-heading\">Simulation<\/h2>\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\"><\/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\"><\/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\"><\/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\"><\/figure>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Logiktester\"><\/span>Logic tester<span class=\"ez-toc-section-end\"><\/span><\/h2>\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\"><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Datenblatt\"><\/span>Data sheet<span class=\"ez-toc-section-end\"><\/span><\/h2>\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\" 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\" download aria-describedby=\"wp-block-file--media-6ccd3078-f5db-4cbe-9655-e5a780287bb7\">Download<\/a>\n\n\n\n<h1 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Anwendungsbereiche\"><\/span>Areas of application<span class=\"ez-toc-section-end\"><\/span><\/h1>\n\n\n\n<ul class=\"wp-block-list\">\n<li>1 output switch, as soon as an input is high, the power turns off.<\/li>\n\n\n\n<li>In computing from the early 60s to approximately the late 90s <\/li>\n\n\n\n<li>Fenstersteuerung, zwei &Ouml;ffner-Kontake (oben und unten), wenn Fenster komplett ge&ouml;ffnet, beide  Eing&auml;nge auf LOW, Ausgang High =&gt; WarnLED an.<\/li>\n\n\n\n<li>Inverter, Eing&auml;nge verbunden.<\/li>\n\n\n\n<li>Logical sequences<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ansichten\"><\/span>Views<span class=\"ez-toc-section-end\"><\/span><\/h1>\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\"><figcaption class=\"wp-element-caption\">7402 \u2013 4x NOR Gates \u2013 Front Panel<\/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\"><\/a><figcaption class=\"wp-element-caption\">7402 &#8211; 4x NOR Gatter &#8211; R&uuml;ckseite<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<h1 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Schaltung\"><\/span>Circuit<span class=\"ez-toc-section-end\"><\/span><\/h1>\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\"><figcaption class=\"wp-element-caption\">7402 \u2013 Circuit Diagram Test Circuit with NOR Gate 4 (For creation, <a href=\"https:\/\/fritzing.org\/\">Fritzing <\/a>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\"><figcaption class=\"wp-element-caption\">7402 - Test circuit wiring instructions with NOR gate 4 (Used for creation <a href=\"https:\/\/fritzing.org\/\">Fritzing <\/a>used)<\/figcaption><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Test\"><\/span>Test<span class=\"ez-toc-section-end\"><\/span><\/h1>\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\"><figcaption class=\"wp-element-caption\">NOR-Gatter &#8211; Beide Eing&auml;nge 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\"><figcaption class=\"wp-element-caption\">NOR gate \u2013 Input A HIGH, B LOW =&gt; Output 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\"><figcaption class=\"wp-element-caption\">NOR gate \u2013 input A on LOW, B on HIGH =&gt; output 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\"><figcaption class=\"wp-element-caption\">NOR-Gatter &#8211; Beide Eing&auml;nge 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<figcaption class=\"wp-element-caption\">NOR gate \u2013 Video for the images<\/figcaption><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Programm\"><\/span>Programme<span class=\"ez-toc-section-end\"><\/span><\/h1>\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<h1 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Probleme\"><\/span>Problems<span class=\"ez-toc-section-end\"><\/span><\/h1>\n\n\n\n<h2 class=\"wp-block-heading\"><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><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Nicht alle ICs ziehen automatisch die Eing&auml;nge auf Masse, um das Problem zu beheben m&uuml;ssen Pulldown-Widerst&auml;nde zwischen dem Eingang und Masse geschaltet werden. 1kOhm ist OK kann auch mehr sein.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Sonstiges\"><\/span>Miscellaneous<span class=\"ez-toc-section-end\"><\/span><\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Implementing other logic gates with NOR gates.<\/h2>\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<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"NOT_Schaltung\"><\/span>NOT circuit<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">F&uuml;r eine Not Schaltung werden zwei Eing&auml;nge 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>Input A (12)<\/th><th>B (13)<\/th><th>Exit Z<\/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 Gate inputs A and B connected =&gt; NOT gate<\/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\"><figcaption class=\"wp-element-caption\">7402- Nor gate input LOW, output 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\"><figcaption class=\"wp-element-caption\">7402- Not gate input HIGH, output LOW<\/figcaption><\/figure>\n<figcaption class=\"blocks-gallery-caption wp-element-caption\">7402 \u2013 NAND gate<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"OR_Schaltung\"><\/span>OR circuit<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">F&uuml;r die OR Schaltung werden zwei Gatter ben&ouml;tigt eins als NOR und eins als NOT beschaltet.<\/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\"><figcaption class=\"wp-element-caption\">7402- OR Schaltung beide Eing&auml;nge auf LOW, Ausgang 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\"><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\"><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\"><figcaption class=\"wp-element-caption\">7402- OR Schaltung beide Eing&auml;nge auf HIGH, Ausgang HIGH<\/figcaption><\/figure>\n<figcaption class=\"blocks-gallery-caption wp-element-caption\">7402 - OR circuit <\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"AND_Schaltung\"><\/span>AND circuit<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Diese  Schaltung ben&ouml;tigt schon drei Gatter.<\/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\"><figcaption class=\"wp-element-caption\">7402- AND Schaltung beide Eing&auml;nge LOW, Ausagang 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\"><figcaption class=\"wp-element-caption\">7402- AND circuit 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=\"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\"><figcaption class=\"wp-element-caption\">7402 - AND circuit, input A LOW, B HIGH, output 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\"><figcaption class=\"wp-element-caption\">7402- AND Schaltung beide Eing&auml;nge HIGH, Ausagang HIGH<\/figcaption><\/figure>\n<figcaption class=\"blocks-gallery-caption wp-element-caption\">NOR \u2013 AND gate<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">NAND gate<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Diese  Schaltung ben&ouml;tigt vier Gatter und somit alle eines ICs.<\/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\"><figcaption class=\"wp-element-caption\">7402- NAND Schaltung beide Eing&auml;nge LOW, Ausgang 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\"><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\"><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\"><figcaption class=\"wp-element-caption\">7402 &#8211; NAND Schaltung beide Eing&auml;nge HIGH, Ausgang LOW<\/figcaption><\/figure>\n<figcaption class=\"blocks-gallery-caption wp-element-caption\">7402 - NAND Gate<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"RS-FlipFlop\"><\/span>RS-FlipFlop<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Mit den NOR Gattern ben&ouml;tigt man nur zwei Gatter somit kann man mit einem IC gleich zwei Bit speichern. Beim NOR Gatter RS-FlipFlop sind die Ausg&auml;nge Q und !Q (nicht Q) vertauscht.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Durch die R&uuml;ckkopplung muss immer der Vorg&auml;nger 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>Erl&auml;uterung<\/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>Rest on 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>Settings 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>Unzul&auml;ssiger Zustand<\/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>Resetz wird gew&auml;hlt<\/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>Unzul&auml;ssiger Zustand (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>Set wird gew&auml;hlt<\/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&auml;nge auf HIGH, ist unzul&auml;sseig. Der weitere Verlauf h&auml;ngt davon ab welcher der beiden Eing&auml;nge zuerst auf LOW gesetzt wird. Dies f&uuml;hrt dazu dass der Jeweils andere z&auml;hlt. Wird S zuerst auf LOW gesetzt z&auml;hlt der R Eingang somit ist !Q1 aktiv. Im umgekehrten Fall wird R zuerst auf LOW gesetzt z&auml;hlt 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\"><figcaption class=\"wp-element-caption\">7402- RS FlipFlop beide Eing&auml;nge auf LOW, beide Ausg&auml;nge nich 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\"><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\"><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\"><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\"><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\"><figcaption class=\"wp-element-caption\">7402- RS FlipFlop beide Eing&auml;nge auf HIGH, beide Ausg&auml;nge HIGH unzul&auml;ssiger Zustand.<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"XNOR\"><\/span>XNOR<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Der Ausgang ist immer HIGH wenn die Eing&auml;nge gleiches Potential haben (A=B= LOW od. A=B=HIGH). F&uuml;r diese Schaltung ben&ouml;tigt 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><\/tr><\/thead><tbody><tr><td>1<\/td><td>0<\/td><td>0<\/td><td>1<\/td><td>1<\/td><td>1<\/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><\/tr><tr><td>3<\/td><td>0<\/td><td>1<\/td><td>1<\/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>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\"><figcaption class=\"wp-element-caption\">7402- XNOR Schaltung, beide Eing&auml;nge LOW, Ausgang 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\"><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\"><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\"><figcaption class=\"wp-element-caption\">XOR- XNOR Schaltung, beide Eing&auml;nge HIGH, Ausgang HIGH<\/figcaption><\/figure>\n<figcaption class=\"blocks-gallery-caption wp-element-caption\">NOR \u2013 XNOR circuit<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"XOR\"><\/span>XOR<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Beim XOR ist der Ausgang HIGH wenn die Eing&auml;nge unterschiedliedlich sind. F&uuml;r diese Schaltung ben&ouml;tigt 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><\/tr><\/thead><tbody><tr><td>1<\/td><td>0<\/td><td>0<\/td><td>1<\/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>1<\/td><\/tr><tr><td>3<\/td><td>0<\/td><td>1<\/td><td>1<\/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><td>0<\/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\"><figcaption class=\"wp-element-caption\">7402- XOR Schaltung, beide Eing&auml;nge LOW, Ausgang 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\"><figcaption class=\"wp-element-caption\">7402- XNOR circuit, 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=\"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\"><figcaption class=\"wp-element-caption\">7402- XNOR 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=\"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\"><figcaption class=\"wp-element-caption\">7402- XOR Schaltung, beide Eing&auml;nge HIGH, Ausgang LOW<\/figcaption><\/figure>\n<figcaption class=\"blocks-gallery-caption wp-element-caption\">OR - XOR Circuit<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Platine_Gelotet\"><\/span>Platine Gel&ouml;tet<span class=\"ez-toc-section-end\"><\/span><\/h2>\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 schnelle. Dennoch habe ich noch einen Denkfehler gemacht, man beachte die L&ouml;tbr&uuml;cke rechts unten die von einen Widerstand gekr&auml;uzt wird. Die untere Pinleiste ist nicht angeschlossen, das habe ich mir erstmal gespart, ich h&ouml;tte diese direkt an den IC setzen sollen.  Die Jumper trennen die Taster und LED s vom IC sollten andere Schaltungen gesteckt werden. Die Pins sind zum Verbinden der andern Gatter. Ich habe zwei Widerst&auml;nde eingespart indem ich die LED in reihe zu den Pulldown Widerst&auml;nden geschaltet haben. Die 4,5v Versorgungsspannung  &#8211; 1,5V Diodenspannung sind noch &uuml;ber 2,4V und somit ein HIGH ;).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ansicht\"><\/span>View<span class=\"ez-toc-section-end\"><\/span><\/h3>\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\"><figcaption class=\"wp-element-caption\">7402 L&ouml;tplatine &#8211; 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\"><figcaption class=\"wp-element-caption\">7402 L&ouml;tplatine &#8211; R&uuml;ckseite<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Materialliste_BOM\"><\/span>Materialliste<span class=\"ez-toc-section-end\"><\/span><\/h3>\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&uuml;n\/Gelb\/Rot (K&ouml;nnen auch die gleich Farbe haben)<\/td><td>3<\/td><\/tr><tr><td>Jumper (Rot, Gr&uuml;n und Gelb entsp. den LED Farben gew&auml;hlt)<\/td><td>3<\/td><\/tr><tr><td>2 straight Polig pins<\/td><td>3<\/td><\/tr><tr><td>2 Polig Pins abgewingkelt f&uuml;r die Stromversorgung<\/td><td>1<\/td><\/tr><tr><td>7 Polig Pins f&uuml;r zus&auml;tzliche Verbindungen <\/td><td>3<\/td><\/tr><tr><td>Taster mit langen Dr&uuml;cker<\/td><td>2<\/td><\/tr><tr><td>1K Widerstand (Pulldown\/Vorwiederstand f&uuml;r LED)<\/td><td>3<\/td><\/tr><tr><td>14-pin IC socket<\/td><td>1<\/td><\/tr><tr><td>Silberbdraht f&uuml;r die Verbidnungen auf der R&uuml;ckseite<\/td><td>?<\/td><\/tr><tr><td>L&ouml;tzinn<\/td><td>? <\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\">7402 L&ouml;tplatine Materialliste<\/figcaption><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Fazit\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Der 7402 ist nicht weniger faszinierended 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&uuml;r heutige Speicherchips verschwindend gering ist, Stellt dies die Basis f&uuml;r alle neuen Techniken dar. <\/p>\n\n\n\n<h1 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Verwandte_Beitrage\"><\/span>Verwandte Beitr&auml;ge<span class=\"ez-toc-section-end\"><\/span><\/h1>\n\n\n<ul class=\"display-posts-listing\">\n<li class=\"listing-item\"><a class=\"title\" href=\"https:\/\/www.fambach.net\/en\/ttl7402\/\">TTL IC 7402<\/a><\/li>\n<li class=\"listing-item\"><a class=\"title\" href=\"https:\/\/www.fambach.net\/en\/ttlerklaert\/\">TTL \u2013 Transistor-Transistor Logic ICs<\/a><\/li>\n<li class=\"listing-item\"><a class=\"title\" href=\"https:\/\/www.fambach.net\/en\/ttl7400\/\">TTL IC 7400<\/a><\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Quellen\"><\/span>Sources<span class=\"ez-toc-section-end\"><\/span><\/h1>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/de.wikipedia.org\/wiki\/7402\">https:\/\/de.wikipedia.org\/wiki\/7402<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/logigator.com\/editor\">https:\/\/logigator.com\/editor<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/sourceforge.net\/projects\/circuit\">https:\/\/sourceforge.net\/projects\/circuit<\/a> (Logik Simu, Verwende ich f&uuml;r meine Zeichnungen)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/fritzing.org\" target=\"_blank\" rel=\"noreferrer noopener\">Fritzing Circuit Diagram Tool<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"http:\/\/www.cburch.com\/logisim\/de\/index.html\">LogiSim \u2013 Circuit simulator<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/archive.org\/details\/das_ttl_kochbuch\/\">TTL Cookbook<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.elektronik-kompendium.de\/service\/ttlcode.php\">TTL Code Database<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.elektronik-kompendium.de\">https:\/\/www.elektronik-kompendium.de<\/a><\/p>\n\n\n\n<h1 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Log\"><\/span>Log<span class=\"ez-toc-section-end\"><\/span><\/h1>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table id=\"wpls-table-10\"><thead><tr><th>Date<\/th><th>Description<\/th><\/tr><\/thead><tbody><tr><td>26.05.2024<\/td><td>Entry created<\/td><\/tr><tr><td>27.05.2024<\/td><td>Am Schaltplan verwirrt mich die Benennung. Hier ist bspw. der Eingang B des 4. Norgatters mit 4Y Bezeichnet. Die Benennung sollte aber f&uuml;r die Eing&auml;nge Buchstaben am Anfang des Alphabets verweden und f&uuml;r die Ausg&auml;nge am ENDE. Ich habe aber kein Bild gefunden welches benannt ist. (evtl mal im TTL Buch checken) Im Datenblatt sind sie wiederum richtig.<\/td><\/tr><tr><td>29.05.2024<\/td><td>Circuit built on breadboard and pictures taken.<\/td><\/tr><tr><td>30.05.2024<\/td><td>Logic gates built in a simulator.<\/td><\/tr><tr><td>01.06.2024<\/td><td>Beitrag ist erstmal fertig und ver&ouml;ffentlicht.<\/td><\/tr><tr><td>01.06.2024<\/td><td>Platine gel&ouml;tet und fotographiert.<\/td><\/tr><tr><td>03.06.2024<\/td><td>Looked up 7402 in the TTL handbook, designation from the internet is wrong. Image replaced.<\/td><\/tr><tr><td><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><\/tr><tr><td><br><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\">LOG<\/figcaption><\/figure>\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":26,"href":"https:\/\/www.fambach.net\/en\/wp-json\/wp\/v2\/posts\/10972\/revisions"}],"predecessor-version":[{"id":11140,"href":"https:\/\/www.fambach.net\/en\/wp-json\/wp\/v2\/posts\/10972\/revisions\/11140"}],"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}]}}