{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74HCS138DYYR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74HCS138DYYR","canonicalUrl":"https://icboms.com/texas-instruments/SN74HCS138DYYR","factsUrl":"https://icboms.com/api/mcp/products/SN74HCS138DYYR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74HCS series, SN74HCS138DYYR, Type Decoder/Demultiplexer, Circuit 1 x 3:8, Grade Automotive, Qualification AEC-Q100, Voltage - Supply 2V ~ 6V, Operating Temperature -40°C ~ 125°C, Package / Case SOT-23-16 Thin, Surface Mount.","salesMarkdown":"## 3-to-8 decoder/demultiplexer for automotive and industrial buses The Texas Instruments SN74HCS138DYYR is a single 3-to-8 line decoder/demultiplexer from the 74HCS family, qualified to AEC-Q100 for automotive applications. It accepts three binary address inputs and drives one of eight active-low outputs low, with a single active-low enable and two active-high enables for cascading. The part operates across a 2V to 6V supply range, covering 3.3V and 5V logic rails without translation, and is rated for -40°C to 125°C ambient — suited for under-hood ECUs, industrial motor drives, and outdoor telecom line cards where temperature cycling is a given. ## SOT-23-16 Thin — board-area fit Housed in a 16-pin thin SOT-23 variant (SOT-23-16 Thin), this decoder fits dense layouts on automotive ECU inner layers. Surface-mount only; no through-hole option exists. ## Output drive and enable logic Each output sources or sinks 7.8 mA — enough to drive CMOS logic inputs or a low-current indicator LED directly. The three enable inputs (one active-low, two active-high) let you daisy-chain multiple devices without external gating for address expansion beyond 8 lines. ## Lifecycle and sourcing posture Listed as Active and current-production. No direct factory second-source is listed.","metaTitle":"SN74HCS138DYYR 3-to-8 Decoder/Demux, AEC-Q100, -40 to 125°C","metaDescription":"TI SN74HCS138DYYR automotive-grade 3-to-8 decoder/demultiplexer in SOT-23-16 Thin. AEC-Q100 qualified, 2V to 6V supply, -40°C to 125°C.","metaKeywords":null},"attributes":{"series":"74HCS","packageCase":null,"mountingType":null,"rohsStatus":"Not applicable","productStatus":"Active","categoryPath":["DC-DC Power Modules"],"specifications":{"Type":"Decoder/Demultiplexer","Grade":"Automotive","Series":"74HCS","Circuit":"1 x 3:8","Package":"Tape & Reel (TR); Cut Tape (CT)","Mounting Type":"Surface Mount","Qualification":"AEC-Q100","Package / Case":"SOT-23-16 Thin, SOT-23 Variant","lifecycle_stage":"eol_hot","Voltage - Supply":"2V ~ 6V","Independent Circuits":"1","Operating Temperature":"-40°C ~ 125°C","Voltage Supply Source":"Single Supply","Supplier Device Package":"16-SOT-23-THIN","Current - Output High, Low":"7.8mA, 7.8mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.64","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.64000","currency":"USD"},{"qty":10,"price":"$0.54500","currency":"USD"},{"qty":25,"price":"$0.50920","currency":"USD"},{"qty":100,"price":"$0.40720","currency":"USD"},{"qty":250,"price":"$0.37816","currency":"USD"},{"qty":500,"price":"$0.31996","currency":"USD"},{"qty":1000,"price":"$0.24725","currency":"USD"},{"qty":3000,"price":"$0.07474","currency":"USD"},{"qty":6000,"price":"$0.06727","currency":"USD"},{"qty":15000,"price":"$0.05979","currency":"USD"},{"qty":30000,"price":"$0.05606","currency":"USD"},{"qty":75000,"price":"$0.04970","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/53e401a9cdf3fa56910be3cc68efeff3.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is SN74HCS138DYYR AEC-Q100 qualified?","answer":"Yes, the SN74HCS138DYYR is AEC-Q100 qualified, making it suitable for automotive-grade designs including under-hood and chassis-domain applications."},{"question":"What is the difference between SN74HCS138 and SN74HC138?","answer":"The SN74HCS138 is the automotive-grade (AEC-Q100) variant with an extended temperature range of -40°C to 125°C, versus the standard SN74HC138 which is typically commercial (0°C to 70°C) or industrial (-40°C to 85°C) grade. Function and pinout are identical."},{"question":"Can SN74HCS138 be used as a demultiplexer?","answer":"Yes. The 3-to-8 decoder core functions as a 1-to-8 demultiplexer when the address lines are used as data inputs and the enable pins route the signal to the selected output. The active-low outputs invert the data."},{"question":"What is the replacement or equivalent for SN74HCS138DYYR?","answer":"No direct pin-compatible second source is listed. For non-automotive builds, the standard 74HC138 in the same SOT-23-16 Thin package is a functional equivalent but lacks AEC-Q100 qualification and the full -40°C to 125°C range."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74HCS138DYYR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74HCS138DYYR 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}}