{"product_id":"74hc148-8-line-to-3-line-priority-encoder-ic-16-pin-dip-package","title":"74HC148 (8-Line to 3-Line Priority Encoder IC - 16-Pin DIP Package)","description":"\u003cp data-path-to-node=\"5\"\u003eWhen designing complex control panels, custom keyboards, or diagnostic arrays, monitoring 8 individual buttons or fault sensors typically eats up 8 precious GPIO pins on your microcontroller. The \u003cb data-path-to-node=\"5\" data-index-in-node=\"196\"\u003e74HC148\u003c\/b\u003e is the classic silicon solution to this pin-scarcity problem. It is an 8-line to 3-line priority encoder. It looks at 8 independent input lines and condenses them into a clean, 3-bit binary code output.\u003c\/p\u003e\n\u003cp data-path-to-node=\"6\"\u003eThe absolute superpower of this chip lies in the word \u003cb data-path-to-node=\"6\" data-index-in-node=\"54\"\u003ePriority\u003c\/b\u003e. If you were using a standard encoder and two buttons were pressed at the exact same millisecond, the chip would glitch out and output garbage data. The 74HC148 solves this through integrated hardware prioritization: if multiple inputs are triggered simultaneously, it completely ignores the lower-numbered pins and cleanly outputs the binary address of the highest-order active pin (with Input 7 having the absolute highest priority). Built on High-Speed CMOS technology, it operates across a wide 2.0V to 6.0V range, handling complex hardware prioritization in mere nanoseconds while drawing virtually zero power when idle.\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\"\u003e\u003cb data-path-to-node=\"8,0,0\" data-index-in-node=\"0\"\u003e8-to-3 Line Data Compression:\u003c\/b\u003e Encodes 8 individual input lines into a highly efficient 3-bit parallel binary format, freeing up 5 GPIO pins on your processor.\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\"\u003eTrue Hardware Priority Logic:\u003c\/b\u003e Automatically resolves input conflicts on the fly, ensuring your system always responds to the most critical, highest-numbered sensor first.\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\"\u003eCascadable Architecture:\u003c\/b\u003e Features dedicated Enable Input (EI) and Enable Output (EO) pins, allowing you to easily chain multiple 74HC148 chips together to build 16-to-4 or 32-to-5 line encoder blocks.\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\"\u003eMaster Status Flag (GS Pin):\u003c\/b\u003e Includes a Group Signal (GS) output pin that instantly flags your microcontroller whenever \u003ci data-path-to-node=\"8,3,0\" data-index-in-node=\"120\"\u003eany\u003c\/i\u003e valid input is triggered, acting as an excellent master interrupt driver.\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 (16-DIP):\u003c\/b\u003e Standard 0.1-inch (2.54mm) pin pitch allows it to drop effortlessly into any solderless breadboard, prototyping board, or 16-pin IC 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\"\u003eHardware Interrupt Expansion:\u003c\/b\u003e The standard choice for pooling multiple critical sensor or error lines down into a single master interrupt trigger for an Arduino or ESP32.\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\"\u003eCustom Control Panels \u0026amp; Macro Pads:\u003c\/b\u003e Efficiently decodes multi-button inputs, control panels, and navigation switches without burning through your processor's pin count.\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\"\u003eRotary Switch Decoding:\u003c\/b\u003e Transforms physical, multi-position mechanical rotary switches into a tidy, microcontroller-readable binary format.\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 Logic Training:\u003c\/b\u003e An essential teaching tool for demonstrating binary encoding, priority ranking, and cascading logic systems in digital electronics labs.\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 8-Line to 3-Line Priority Encoder\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\"\u003eInput Configuration:\u003c\/b\u003e 8 Active-LOW Inputs\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\"\u003eOutput Configuration:\u003c\/b\u003e 3-Bit Active-LOW Binary Output + GS + EO\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\"\u003eHigh-Speed Propagation Delay:\u003c\/b\u003e ~15 ns (Typical 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\"\u003eMaximum Output Current:\u003c\/b\u003e ~5.2 mA per pin\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 16-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":42866159386695,"sku":null,"price":0.0,"currency_code":"KES","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0680\/7637\/2039\/files\/20200806_192406_480x320_3ffbe963-a437-4a62-918b-9db39d5611ef.webp?v=1781092145","url":"https:\/\/www.ktechnics.com\/products\/74hc148-8-line-to-3-line-priority-encoder-ic-16-pin-dip-package","provider":"K-TECHNICS","version":"1.0","type":"link"}