{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74LS138D","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74LS138D","canonicalUrl":"https://icboms.com/texas-instruments/SN74LS138D","factsUrl":"https://icboms.com/api/mcp/products/SN74LS138D","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74LS series Decoder/Demultiplexer, SN74LS138D, 1 x 3:8 circuit, 16-SOIC package, Surface Mount, 4.75V ~ 5.25V supply, 0°C ~ 70°C.","salesMarkdown":"## Active 3-to-8 line decoder for address decoding and demultiplexing The SN74LS138D is a 1-of-8 decoder/demultiplexer from the 74LS family, active in production and ROHS3 compliant. It accepts a 3-bit binary input and asserts one of eight active-low outputs, making it a standard building block for memory-mapped I/O address decoding and data routing in 5 V logic systems. The device sources 400 µA and sinks 8 mA per output (high/low) — enough to drive one or two standard TTL loads directly, but not enough for high-fan-out buses without buffering. For a memory chip select line or a single LED indicator, the 8 mA sink handles the load without an external transistor. The surface-mount form factor suits high-density PCBs where through-hole decoders would consume more board area. ## Sourcing and compliance for the BOM line The ROHS3 compliance covers current EU substance restrictions, so no exemption paperwork is needed for new builds shipping into regulated markets.","metaTitle":"SN74LS138D Decoder/Demultiplexer, 1x3:8, 16-SOIC, Active","metaDescription":"Texas Instruments SN74LS138D 1-of-8 decoder/demultiplexer, 4.75-5.25V supply, 400µA/8mA output drive, 0-70°C, ROHS3. Active production. Request quote.","metaKeywords":null},"attributes":{"series":"74LS","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Type":"Decoder/Demultiplexer","Series":"74LS","Circuit":"1 x 3:8","Package":"Tube","Mounting Type":"Surface Mount","Package / Case":"16-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"4.75V ~ 5.25V","Independent Circuits":"1","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":"$0.91","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.91000","currency":"USD"},{"qty":10,"price":"$0.81300","currency":"USD"},{"qty":25,"price":"$0.77160","currency":"USD"},{"qty":100,"price":"$0.63390","currency":"USD"},{"qty":250,"price":"$0.59256","currency":"USD"},{"qty":500,"price":"$0.52364","currency":"USD"},{"qty":1000,"price":"$0.41340","currency":"USD"},{"qty":2500,"price":"$0.39000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/a2a6db0ff07322d193a670f2cfc006b5.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How can I order SN74LS138D or check current pricing?","answer":"The SN74LS138D is an active Texas Instruments part."},{"question":"What is the closest pin-compatible alternative to SN74LS138D?","answer":"The 74LS138 is a standard logic function with many second-source manufacturers (e.g., NXP, ON Semiconductor), but each variant should be verified for pinout and timing compatibility against the TI datasheet."},{"question":"What compliance documentation does Texas Instruments provide for SN74LS138D?","answer":"The SN74LS138D is ROHS3 compliant. Texas Instruments typically provides a Declaration of Conformity and material composition data on request through distribution channels."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74LS138D","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74LS138D when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}