{"product_id":"hd74ls138p-dip-16-decoder-multiplexer-ic-5-pack-74ls138","title":"HD74LS138P DIP-16 Decoder Multiplexer IC – 5 Pack | 74LS138","description":"\u003ch2\u003eHD74LS138P 3-to-8 Line Decoder \/ Demultiplexer – 5-Piece Set\u003c\/h2\u003e\n\u003cp\u003eGet five brand-new \u003cstrong\u003eHD74LS138P integrated circuits\u003c\/strong\u003e in a single pack. These DIP-16 through-hole ICs are 3-to-8 line decoder\/demultiplexers built on the proven 74LS TTL logic family — a staple in digital design, prototyping, and electronics repair projects. Each chip features three enable inputs for straightforward cascading and glitch-free switching, making them ideal for memory address decoding, data routing, and embedded system design.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e HD74LS138P \/ HD74LS138\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage:\u003c\/strong\u003e DIP-16 (Dual In-Line, 16-pin, straight\/through-hole)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e 3-to-8 Line Decoder \/ Demultiplexer\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLogic Family:\u003c\/strong\u003e 74LS (Low-Power Schottky TTL)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Brand New\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 5 pieces per order\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Concern Chemicals:\u003c\/strong\u003e None\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eMade in Mainland China\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e3-to-8 line decoding with active-LOW outputs for versatile logic interfacing\u003c\/li\u003e\n  \u003cli\u003eThree enable inputs (2 active-LOW, 1 active-HIGH) allow easy cascading and chip selection\u003c\/li\u003e\n  \u003cli\u003eStandard DIP-16 footprint fits breadboards, perfboards, and PCB sockets with no special tooling\u003c\/li\u003e\n  \u003cli\u003eLow-power Schottky (LS) process ensures fast switching with minimal current draw\u003c\/li\u003e\n  \u003cli\u003eCompatible with all standard 74-series TTL and CMOS logic designs\u003c\/li\u003e\n  \u003cli\u003ePack of 5 — great for prototyping spares, classroom kits, or multi-board builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eMemory address decoding in microcontroller and microprocessor circuits\u003c\/li\u003e\n  \u003cli\u003eData demultiplexing and bus expansion\u003c\/li\u003e\n  \u003cli\u003eSeven-segment display driving via decoder logic\u003c\/li\u003e\n  \u003cli\u003eDigital logic education, breadboard experimentation, and lab projects\u003c\/li\u003e\n  \u003cli\u003eReplacement or spare for existing HD74LS138 or compatible 74LS138 chips\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cp\u003e\n  \u003ca href=\"\/products\/electromagnetic-induction-tester-coil-motherboard-fault-detector\"\u003eElectromagnetic Induction Tester – Coil \u0026amp; Circuit Fault Detector\u003c\/a\u003e\u003cbr\u003e\n  \u003ca href=\"\/products\/air-compressor-pressure-gauge-0-10-0-12-0-25-bar-hydraulic-diy\"\u003eAir Compressor Pressure Gauge 0-10\/0-12\/0-25 Bar | DIY Tool\u003c\/a\u003e\n\u003c\/p\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/eye-face-protection\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on eye and face protection\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Are these HD74LS138P ICs compatible with standard 74LS138 pinouts and circuits?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The HD74LS138P follows the industry-standard 74LS138 pinout and electrical specification, making it a direct drop-in replacement for any circuit designed around the 74LS138, SN74LS138, or M74LS138 in a DIP-16 package. It works with both TTL and CMOS 5V logic systems.\u003c\/p\u003e\n\u003ch4\u003eQ: What does the 3-to-8 decoder\/demultiplexer function mean in practice?\u003c\/h4\u003e\n\u003cp\u003eA: The HD74LS138P takes a 3-bit binary input (8 possible combinations) and activates one of eight corresponding active-LOW output lines. This makes it perfect for selecting one of eight memory chips, I\/O ports, or devices in a digital system — only the selected output goes LOW while all others remain HIGH.\u003c\/p\u003e\n\u003ch4\u003eQ: Is the DIP-16 package breadboard-compatible?\u003c\/h4\u003e\n\u003cp\u003eA: Absolutely. The DIP-16 through-hole package has standard 0.1-inch (2.54 mm) pin spacing, so it plugs directly into any standard breadboard, PCB socket, or perfboard without adapters or soldering fixtures.\u003c\/p\u003e\n\u003ch4\u003eQ: Why buy a 5-pack instead of a single chip?\u003c\/h4\u003e\n\u003cp\u003eA: Having multiple units on hand is ideal for multi-board projects, prototyping iterations, classroom or lab kits, and keeping spares for future repairs. The 5-pack offers better value per chip compared to buying individually.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Are these HD74LS138P ICs compatible with standard 74LS138 pinouts and circuits?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. The HD74LS138P follows the industry-standard 74LS138 pinout and electrical specification, making it a direct drop-in replacement for any circuit designed around the 74LS138, SN74LS138, or M74LS138 in a DIP-16 package. It works with both TTL and CMOS 5V logic systems.\"}}, {\"@type\": \"Question\", \"name\": \"What does the 3-to-8 decoder\/demultiplexer function mean in practice?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The HD74LS138P takes a 3-bit binary input (8 possible combinations) and activates one of eight corresponding active-LOW output lines. This makes it perfect for selecting one of eight memory chips, I\/O ports, or devices in a digital system — only the selected output goes LOW while all others remain HIGH.\"}}, {\"@type\": \"Question\", \"name\": \"Is the DIP-16 package breadboard-compatible?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Absolutely. The DIP-16 through-hole package has standard 0.1-inch (2.54 mm) pin spacing, so it plugs directly into any standard breadboard, PCB socket, or perfboard without adapters or soldering fixtures.\"}}, {\"@type\": \"Question\", \"name\": \"Why buy a 5-pack instead of a single chip?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Having multiple units on hand is ideal for multi-board projects, prototyping iterations, classroom or lab kits, and keeping spares for future repairs. The 5-pack offers better value per chip compared to buying individually.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/n8ande-60.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Home page\", \"item\": \"https:\/\/n8ande-60.myshopify.com\/collections\/frontpage\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"HD74LS138P DIP-16 Decoder Multiplexer IC – 5 Pack | 74LS138\", \"item\": \"https:\/\/n8ande-60.myshopify.com\/products\/hd74ls138p-dip16-decoder-demultiplexer-ic-5-pack-74ls138\"}]}\u003c\/script\u003e","brand":"Axl","offers":[{"title":"Default Title","offer_id":43699450642493,"sku":"\u003cnone\u003e","price":47.61,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0671\/3439\/0333\/files\/Sadd147b712444954b7a95115c7cbb54dz.webp?v=1790183637","url":"https:\/\/qtiply.com\/products\/hd74ls138p-dip-16-decoder-multiplexer-ic-5-pack-74ls138","provider":"QTP","version":"1.0","type":"link"}