{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74ALS139D","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74ALS139D","canonicalUrl":"https://icboms.com/texas-instruments/SN74ALS139D","factsUrl":"https://icboms.com/api/mcp/products/SN74ALS139D","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments SN74ALS139D, 74ALS series Decoder/Demultiplexer, 1 x 2:4 circuit, dual independent decoders, 16-SOIC surface mount, single 4.5V ~ 5.5V supply, 0°C ~ 70°C operating temperature.","salesMarkdown":"## Dual 2:4 decoder/demultiplexer for address decoding and signal routing The Texas Instruments SN74ALS139D is a dual 2-line to 4-line decoder/demultiplexer from the 74ALS family. Each of the two independent circuits selects one of four active-low outputs based on a 2-bit address input, with an active-low enable per section. ## Output drive — fan-out and bus loading Outputs source 400 µA and sink 8 mA. That sink current is enough to drive up to ten 74ALS or 74LS standard loads, but the weak source current means it cannot directly drive LED indicators or relay coils without a buffer. For bus-oriented designs, the 8 mA sink handles terminated backplanes with moderate fan-out; expect to add a line driver for heavily loaded or long traces. ## Lifecycle and sourcing The SN74ALS139D carries an active lifecycle status. There is no last-time-buy notice or NRND flag, so it remains a valid line-item for both new production and ongoing builds.","metaTitle":"SN74ALS139D Decoder/Demultiplexer, 1 x 2:4, 16-SOIC","metaDescription":"SN74ALS139D dual 2:4 decoder/demultiplexer from TI 74ALS family. Single 4.5-5.5 V supply, 0-70°C, 16-SOIC.","metaKeywords":null},"attributes":{"series":"74ALS","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Type":"Decoder/Demultiplexer","Series":"74ALS","Circuit":"1 x 2:4","Package":"Tube","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":"0°C ~ 70°C","Voltage Supply Source":"Single Supply","Supplier Device Package":"16-SOIC","Current - Output High, Low":"400µA, 8mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.29","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.29000","currency":"USD"},{"qty":10,"price":"$1.15700","currency":"USD"},{"qty":25,"price":"$1.09800","currency":"USD"},{"qty":100,"price":"$0.90210","currency":"USD"},{"qty":250,"price":"$0.84324","currency":"USD"},{"qty":500,"price":"$0.74518","currency":"USD"},{"qty":1000,"price":"$0.58830","currency":"USD"},{"qty":2500,"price":"$0.55500","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/9dd1a07fb4df9d15176c482353433dae.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the difference between SN74ALS139D and 74LS139?","answer":"Both are dual 2:4 decoder/demultiplexers in the same 16-SOIC footprint and 5 V supply range. The ALS variant typically offers lower propagation delay and reduced power consumption per gate compared to the LS family, but the exact speed/power trade-off should be verified against the respective datasheets for timing closure in a given design."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74ALS139D","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74ALS139D when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}