{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74HCT139DR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74HCT139DR","canonicalUrl":"https://icboms.com/texas-instruments/SN74HCT139DR","factsUrl":"https://icboms.com/api/mcp/products/SN74HCT139DR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74HCT series dual 1-of-4 decoder/demultiplexer, SN74HCT139DR, 4.5-5.5V supply, 4mA output drive, 16-SOIC surface mount package, -40 to 85°C.","salesMarkdown":"## Dual 1-of-4 decoder/demultiplexer in 16-SOIC The SN74HCT139DR is a dual 1-of-4 decoder/demultiplexer from TI's 74HCT logic family. Each of the two independent circuits selects one of four active-low outputs based on a 2-bit binary address input, with a common active-low enable per decoder. The 1.27mm lead pitch and gull-wing leads are pick-and-place friendly with good solder-joint inspection access. Surface-mount assembly on a two-layer board is straightforward — the 4mA output drive per channel does not demand heavy copper pour for thermal management. Standard reflow profiles for 1.6mm FR-4 apply. ## Output drive and fan-out Each output sources or sinks 4mA at the rated supply voltage. This is sufficient to drive up to 10 standard 74HCT gate inputs per output (fan-out of 10), or directly switch a low-power LED indicator through a current-limiting resistor. The 4mA drive is typical for HCT family parts — adequate for on-board logic fan-out but not intended for driving relays or high-capacitance bus lines without a buffer.","metaTitle":"SN74HCT139DR Texas Instruments 74HCT Decoder/Demux, 16-SOIC","metaDescription":"TI SN74HCT139DR dual 1-of-4 decoder/demultiplexer, 4.5-5.5V supply, -40 to 85°C, 16-SOIC. Active production, ROHS3 compliant. Quoted to order.","metaKeywords":null},"attributes":{"series":"74HCT","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Type":"Decoder/Demultiplexer","Series":"74HCT","Circuit":"1 x 2:4","Package":"Tape & Reel (TR); Cut Tape (CT)","Mounting Type":"Surface Mount","Package / Case":"16-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"4.5V ~ 5.5V","Independent Circuits":"2","Operating Temperature":"-40°C ~ 85°C","Voltage Supply Source":"Single Supply","Supplier Device Package":"16-SOIC","Current - Output High, Low":"4mA, 4mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.45","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.45000","currency":"USD"},{"qty":10,"price":"$0.38600","currency":"USD"},{"qty":25,"price":"$0.36000","currency":"USD"},{"qty":100,"price":"$0.28790","currency":"USD"},{"qty":250,"price":"$0.26732","currency":"USD"},{"qty":500,"price":"$0.22620","currency":"USD"},{"qty":1000,"price":"$0.17479","currency":"USD"},{"qty":2500,"price":"$0.15937","currency":"USD"},{"qty":5000,"price":"$0.14909","currency":"USD"},{"qty":12500,"price":"$0.14550","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/e7f8becf6ccdad9279f902d170c5e2d0.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the SN74HCT139DR used for?","answer":"The SN74HCT139DR is a dual 1-of-4 decoder/demultiplexer. It routes a signal to one of four outputs based on a 2-bit address, or decodes a 2-bit address into an active-low output line. Common uses include memory chip select decoding, I/O port expansion, and address demultiplexing in 5V logic systems."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74HCT139DR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74HCT139DR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}