{"product_id":"74266-74hc266-74ls266-xnor-gates-quad-exclusive-nor-gate","title":"74266 74hc266 74ls266 Xnor Gates Quad Exclusive-nor Gate","description":"\u003cp\u003eThe 74×266 (ex 74HC266) is a chip with four open-collector XNOR gates. Open-collector outputs make it simple to connect to other chips that use different logic levels. But it also means you can’t use this chip as a direct replacement for a normal XNOR gate chip.\u003c\/p\u003e\n\u003cp\u003eIn this guide, you will learn all about this chip and how you can use its XNOR gates in your own circuit.\u003c\/p\u003e\n\u003cfigure class=\"wp-block-image size-large\"\u003e\u003cimg sizes=\"(max-width: 1024px) 100vw, 1024px\" srcset=\"https:\/\/www.build-electronic-circuits.com\/wp-content\/uploads\/2023\/10\/74x266_package-and-pinout.png 1024w, https:\/\/www.build-electronic-circuits.com\/wp-content\/uploads\/2023\/10\/74x266_package-and-pinout-500x282.png 500w, https:\/\/www.build-electronic-circuits.com\/wp-content\/uploads\/2023\/10\/74x266_package-and-pinout-768x433.png 768w\" class=\"wp-image-21460\" alt=\"74LS266 \/ 74HC266 Package and Pinout\" src=\"https:\/\/www.build-electronic-circuits.com\/wp-content\/uploads\/2023\/10\/74x266_package-and-pinout-1024x578.png\" height=\"578\" width=\"1024\" decoding=\"async\" fetchpriority=\"high\" data-original=\"https:\/\/www.build-electronic-circuits.com\/wp-content\/uploads\/2023\/10\/74x266_package-and-pinout-1024x578.png\" loading=\"lazy\"\u003e\u003c\/figure\u003e\n\u003ch2 class=\"wp-block-heading\" id=\"what-does-the-74hc266-74ls266-do\"\u003eWhat does the 74HC266 \/ 74LS266 do?\u003c\/h2\u003e\n\u003cp\u003eThe 74×266 gives you four open-collector XNOR gates that can be used individually. An\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.build-electronic-circuits.com\/xnor-gate\/\" title=\"Xnor gate - logic gates tutorial\"\u003eXNOR gate\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003eis a\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.build-electronic-circuits.com\/logic-gates\/\" title=\"Logic gates: understand the basics of digital electronics\"\u003elogic gate\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003ethat outputs 1 (HIGH) if its inputs are equal (both 1 or both 0). In the truth table below, you can see what the output will be for any given input:\u003c\/p\u003e\n\u003cdiv class=\"wp-block-image\"\u003e\n\u003cfigure class=\"aligncenter size-full is-resized\"\u003e\u003cimg sizes=\"(max-width: 500px) 100vw, 500px\" srcset=\"https:\/\/www.build-electronic-circuits.com\/wp-content\/uploads\/2022\/09\/Truth-table-XNOR-gate.png 500w, https:\/\/www.build-electronic-circuits.com\/wp-content\/uploads\/2022\/09\/Truth-table-XNOR-gate-417x500.png 417w\" class=\"wp-image-18474\" alt=\"XNOR gate truth table\" src=\"https:\/\/www.build-electronic-circuits.com\/wp-content\/uploads\/2022\/09\/Truth-table-XNOR-gate.png\" height=\"600\" width=\"500\" decoding=\"async\" data-original=\"https:\/\/www.build-electronic-circuits.com\/wp-content\/uploads\/2022\/09\/Truth-table-XNOR-gate.png\" loading=\"lazy\"\u003e\n\u003cfigcaption class=\"wp-element-caption\"\u003eTruth table for the XNOR gate\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n\u003c\/div\u003e\n\u003ch2 class=\"wp-block-heading\" id=\"how-to-use-this-chip\"\u003eHow To Use This Chip\u003c\/h2\u003e\n\u003cp\u003eThe 74HC266 comes in a 14-pin package, and you need to connect it to power before you can use it. Most 7400 ICs support a VCC voltage of 5V. One difference between the HC and LS version of the chip is that the 74HC266 supports 2V to 6V, while the 74LS266 only supports 5V.\u003c\/p\u003e\n\u003cp\u003eOnce it’s connected, you can use any of the four open-collector XNOR gates inside.\u003c\/p\u003e\n\u003cdiv class=\"wp-block-image\"\u003e\n\u003cfigure class=\"aligncenter size-full\"\u003e\u003cimg sizes=\"(max-width: 1024px) 100vw, 1024px\" srcset=\"https:\/\/www.build-electronic-circuits.com\/wp-content\/uploads\/2023\/03\/7400-series-DIP14-powered.png 1024w, https:\/\/www.build-electronic-circuits.com\/wp-content\/uploads\/2023\/03\/7400-series-DIP14-powered-500x289.png 500w, https:\/\/www.build-electronic-circuits.com\/wp-content\/uploads\/2023\/03\/7400-series-DIP14-powered-768x444.png 768w\" class=\"wp-image-20021\" alt=\"7400 series IC connected to 5V on a breadboard\" src=\"https:\/\/www.build-electronic-circuits.com\/wp-content\/uploads\/2023\/03\/7400-series-DIP14-powered.png\" height=\"592\" width=\"1024\" decoding=\"async\" data-original=\"https:\/\/www.build-electronic-circuits.com\/wp-content\/uploads\/2023\/03\/7400-series-DIP14-powered.png\" loading=\"lazy\"\u003e\n\u003cfigcaption class=\"wp-element-caption\"\u003eThe 74HC266\/74LS266 IC connected to power\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n\u003c\/div\u003e\n\u003cp\u003eThis chip uses\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.build-electronic-circuits.com\/open-collector-outputs\/\" title=\"Open collector output - what is it and how do i use it?\"\u003eopen-collector outputs\u003c\/a\u003e. That means you can only\u003cspan\u003e \u003c\/span\u003e\u003cem\u003esink\u003cspan\u003e \u003c\/span\u003e\u003c\/em\u003ecurrent (current can flow into the chip), not\u003cspan\u003e \u003c\/span\u003e\u003cem\u003esource\u003c\/em\u003e\u003cspan\u003e \u003c\/span\u003eit (current cannot flow out of the chip).\u003c\/p\u003e\n\u003cp\u003eEach gate output of the 74HC266 can sink about 4 mA when powered with 5V. While the 74LS266 can usually sink about 8 mA of current. These values can vary between manufacturers of the chip though.\u003c\/p\u003e\n\u003ch3 class=\"wp-block-heading\" id=\"how-to-use-open-collector-outputs\"\u003eHow To Use Open-Collector Outputs\u003c\/h3\u003e\n\u003cp\u003eThe outputs from the 74HC266 are not your normal high\/low outputs. Instead, they use something called\u003cspan\u003e \u003c\/span\u003e\u003cem\u003eopen-collector\u003c\/em\u003e. Open-collector outputs are outputs that are connected via a\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.build-electronic-circuits.com\/how-transistors-work\/\" title=\"How transistors work (bjt and mosfet) - the simple explanation\"\u003etransistor\u003c\/a\u003e. And the collector of the transistor is available at the pin. For an XNOR gate, it will look like this:\u003c\/p\u003e\n\u003c!----\u003e","brand":"Digilog Electronics","offers":[{"title":"Default Title","offer_id":43962541998145,"sku":"b693","price":150.0,"currency_code":"PKR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0727\/2805\/1777\/files\/7426674HC26674LS266XNORGatesQuadEXCLUSIVE-NORGate1.jpg?v=1779568739","url":"https:\/\/stem.pk\/products\/74266-74hc266-74ls266-xnor-gates-quad-exclusive-nor-gate","provider":"stem.pk","version":"1.0","type":"link"}