{"product_id":"74hc02-quad-2-input-nor-gate-ic-14-pin-dip-package","title":"74HC02 (Quad 2-Input NOR Gate IC - 14-Pin DIP Package)","description":"\u003cp data-path-to-node=\"5\" id=\"p-rc_9604430517ad7bf4-671\"\u003eWhen your digital logic requires an action to happen \u003ci data-path-to-node=\"5\" data-index-in-node=\"53\"\u003eonly\u003c\/i\u003e when all other conditions are completely quiet or off, the \u003cb data-path-to-node=\"5\" data-index-in-node=\"117\"\u003e74HC02\u003c\/b\u003e is the integrated circuit you need. \u003cspan class=\"citation-759 citation-end-759\"\u003eThis classic 14-pin chip houses four completely independent, 2-input NOR (NOT-OR) gates.\u003csup class=\"superscript\" data-turn-source-index=\"2\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e A NOR gate follows a strict and highly useful truth table: its output will only turn ON (High) if Input A \u003ci data-path-to-node=\"5\" data-index-in-node=\"355\"\u003eand\u003c\/i\u003e Input B are both OFF (Low). \u003cspan class=\"citation-758 citation-end-758\"\u003eIf either input, or both inputs, receive a High signal, the output is immediately forced Low.\u003csup class=\"superscript\" data-turn-source-index=\"3\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"6\" id=\"p-rc_9604430517ad7bf4-672\"\u003e\u003cspan class=\"citation-757\"\u003eThe \"HC\" designation signifies \u003c\/span\u003e\u003cb data-path-to-node=\"6\" data-index-in-node=\"31\"\u003e\u003cspan class=\"citation-757\"\u003eHigh-Speed CMOS\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-757 citation-end-757\"\u003e technology, giving this chip the blazing switching speeds of vintage TTL logic but with the ultra-low power consumption and wide voltage tolerance of modern silicon.\u003csup class=\"superscript\" data-turn-source-index=\"4\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003cspan class=\"citation-756 citation-end-756\"\u003eOperating comfortably anywhere from 2.0V to 6.0V, it bridges standard 5V logic and modern 3.3V systems seamlessly.\u003csup class=\"superscript\" data-turn-source-index=\"5\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003cspan class=\"citation-755 citation-end-755\"\u003eBeyond basic decision-making, the NOR gate is famous in computing history as the foundational building block for the \"SR (Set-Reset) Latch\"—the fundamental circuit used to create physical memory states from raw logic gates.\u003csup class=\"superscript\" data-turn-source-index=\"6\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"7\"\u003e\u003cb data-path-to-node=\"7\" data-index-in-node=\"0\"\u003eKey Features \u0026amp; Functional Advantages:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"8\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,0,0\" id=\"p-rc_9604430517ad7bf4-673\"\u003e\u003cspan class=\"citation-754\"\u003e\u003c\/span\u003e\u003cb data-path-to-node=\"8,0,0\" data-index-in-node=\"0\"\u003e\u003cspan class=\"citation-754\"\u003eFour Independent Gates:\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-754 citation-end-754\"\u003e Packs four separate 2-input NOR gates into a single 14-pin footprint, allowing you to execute multiple parallel logic operations or build dual SR latches on one chip.\u003csup class=\"superscript\" data-turn-source-index=\"7\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,1,0\"\u003e\u003cb data-path-to-node=\"8,1,0\" data-index-in-node=\"0\"\u003eHigh-Speed CMOS (HC) Architecture:\u003c\/b\u003e Delivers high-speed propagation with virtually zero quiescent power draw, making it highly efficient for always-on, battery-powered alarm or logic circuits.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,2,0\"\u003e\u003cb data-path-to-node=\"8,2,0\" data-index-in-node=\"0\"\u003eWide Operating Voltage:\u003c\/b\u003e Operates flawlessly across a 2.0V to 6.0V range, ensuring plug-and-play compatibility with nearly every modern hobbyist microcontroller.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,3,0\"\u003e\u003cb data-path-to-node=\"8,3,0\" data-index-in-node=\"0\"\u003eHigh Noise Immunity:\u003c\/b\u003e The CMOS inputs naturally resist false triggering from electrical interference, providing rock-solid logic states in messy, wire-heavy breadboard environments.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,4,0\"\u003e\u003cb data-path-to-node=\"8,4,0\" data-index-in-node=\"0\"\u003eBreadboard Native:\u003c\/b\u003e The 0.1-inch (2.54mm) pin pitch drops flawlessly into any solderless breadboard, perfboard, or standard 14-pin DIP socket.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"9\"\u003e\u003cb data-path-to-node=\"9\" data-index-in-node=\"0\"\u003ePerfect For:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"10\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,0,0\"\u003e\u003cb data-path-to-node=\"10,0,0\" data-index-in-node=\"0\"\u003eSR Flip-Flops (Latches):\u003c\/b\u003e The absolute standard hardware for cross-coupling two gates together to build basic 1-bit memory cells and custom hardware debouncing circuits for mechanical switches.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,1,0\"\u003e\u003cb data-path-to-node=\"10,1,0\" data-index-in-node=\"0\"\u003eFail-Safe Alarm Logic:\u003c\/b\u003e Easily triggers a \"System OK\" green LED \u003ci data-path-to-node=\"10,1,0\" data-index-in-node=\"63\"\u003eonly\u003c\/i\u003e when neither Sensor A nor Sensor B is detecting a fault.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,2,0\"\u003e\u003cb data-path-to-node=\"10,2,0\" data-index-in-node=\"0\"\u003eHomebrew 8-Bit Computers:\u003c\/b\u003e An indispensable component for hobbyists building custom instruction decoders, memory addressing logic, and clock gating in DIY CPU builds.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,3,0\"\u003e\u003cb data-path-to-node=\"10,3,0\" data-index-in-node=\"0\"\u003eEducational STEM Kits:\u003c\/b\u003e The perfect hands-on tool for teaching students the principles of De Morgan's laws, Boolean algebra, and universal logic gates (since any other logic gate can technically be built using only NOR gates).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"11\"\u003e\u003cb data-path-to-node=\"11\" data-index-in-node=\"0\"\u003eTechnical Specifications:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"12\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,0,0\"\u003e\u003cb data-path-to-node=\"12,0,0\" data-index-in-node=\"0\"\u003eLogic Family:\u003c\/b\u003e 74HC (High-Speed CMOS)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,1,0\"\u003e\u003cb data-path-to-node=\"12,1,0\" data-index-in-node=\"0\"\u003eLogic Function:\u003c\/b\u003e NOR Gate (NOT-OR)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,2,0\"\u003e\u003cb data-path-to-node=\"12,2,0\" data-index-in-node=\"0\"\u003eNumber of Gates:\u003c\/b\u003e 4 (Quad)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,3,0\"\u003e\u003cb data-path-to-node=\"12,3,0\" data-index-in-node=\"0\"\u003eNumber of Inputs:\u003c\/b\u003e 2 per gate\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,4,0\"\u003e\u003cb data-path-to-node=\"12,4,0\" data-index-in-node=\"0\"\u003eOperating Supply Voltage (Vcc):\u003c\/b\u003e 2.0V to 6.0V\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,5,0\"\u003e\u003cb data-path-to-node=\"12,5,0\" data-index-in-node=\"0\"\u003eMaximum Output Current:\u003c\/b\u003e ~5.2 mA (per pin at 5V)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,6,0\"\u003e\u003cb data-path-to-node=\"12,6,0\" data-index-in-node=\"0\"\u003ePropagation Delay:\u003c\/b\u003e ~9 ns (Typical at 5V)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,7,0\"\u003e\u003cb data-path-to-node=\"12,7,0\" data-index-in-node=\"0\"\u003ePackage \/ Case:\u003c\/b\u003e 14-DIP (0.300\", 7.62mm width)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,8,0\"\u003e\u003cb data-path-to-node=\"12,8,0\" data-index-in-node=\"0\"\u003eMounting Type:\u003c\/b\u003e Through-Hole (PTH)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"K-TECHNICS","offers":[{"title":"Default Title","offer_id":42865604689991,"sku":null,"price":50.0,"currency_code":"KES","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0680\/7637\/2039\/files\/74hc02-nor-gate-ic-500x500-1.webp?v=1781081761","url":"https:\/\/www.ktechnics.com\/products\/74hc02-quad-2-input-nor-gate-ic-14-pin-dip-package","provider":"K-TECHNICS","version":"1.0","type":"link"}