{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CD74HC251MT","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"CD74HC251MT","canonicalUrl":"https://icboms.com/texas-instruments/CD74HC251MT","factsUrl":"https://icboms.com/api/mcp/products/CD74HC251MT","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74HC series, CD74HC251MT, Type: Multiplexer, Circuit: 1 x 8:1, Supply: 2V ~ 6V, Single Supply, Output: 5.2mA / 5.2mA, -55°C ~ 125°C, 16-SOIC, Surface Mount, Active, ROHS3.","salesMarkdown":"It selects one of eight data inputs and routes it to a single output, controlled by three address lines and an output-enable (strobe) pin. The 2V to 6V supply range means it works in 5V TTL systems as well as 3.3V or battery-powered designs. ## Supply voltage and logic-level fit The CD74HC251MT runs from 2V to 6V, so it is fully compatible with 5V logic — no level-shifting needed when interfacing with 5V microcontrollers or legacy TTL buses. At 5V the HC family's input thresholds are well within standard CMOS and TTL levels. The same part also works at 3.3V for mixed-voltage designs, though output drive is reduced at lower supply. The single-supply operation keeps the BOM simple — no separate analog rail needed. ## Temperature grade and deployment That makes it a candidate for avionics, satellite, downhole drilling, and engine-bay electronics where the ambient can swing from arctic cold to under-hood heat. The 74HC family is well-characterised over this range, so timing and drive strength are predictable. For a field-service swap, the 16-SOIC body is large enough to hand-solder with care, though a hot-air station is cleaner. ## Output drive and fan-out The CD74HC251MT can source or sink 5.2mA per output. That is typical for HC logic — enough to drive a few CMOS inputs, an LED with a series resistor, or a low-power relay driver through a transistor. For heavier loads, buffer the output. The output current is symmetric (5.2mA high, 5.2mA low), so the high and low levels have similar drive strength. ## Lifecycle and sourcing posture There is no announced end-of-life, so it is safe to qualify into new designs. No LTB risk or last-time-buy window to track.","metaTitle":"CD74HC251MT Multiplexer, 74HC, 1 x 8:1, 16-SOIC","metaDescription":"CD74HC251MT 74HC 1 x 8:1 multiplexer from Texas Instruments. 2V to 6V supply, 5.2mA output drive, -55°C to 125°C. Active, ROHS3.","metaKeywords":null},"attributes":{"series":"74HC","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Logic ICs"],"specifications":{"Type":"Multiplexer","Series":"74HC","Circuit":"1 x 8:1","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":"2V ~ 6V","Independent Circuits":"1","Operating Temperature":"-55°C ~ 125°C","Voltage Supply Source":"Single Supply","Supplier Device Package":"16-SOIC","Current - Output High, Low":"5.2mA, 5.2mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.04","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.04000","currency":"USD"},{"qty":10,"price":"$0.92600","currency":"USD"},{"qty":25,"price":"$0.87840","currency":"USD"},{"qty":100,"price":"$0.72160","currency":"USD"},{"qty":250,"price":"$0.67460","currency":"USD"},{"qty":500,"price":"$0.59614","currency":"USD"},{"qty":1250,"price":"$0.47064","currency":"USD"},{"qty":2500,"price":"$0.44400","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/1f2e3cef6af1f9f38c1bf1bcaf8fa7c3.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Can I use CD74HC251MT in 5V logic?","answer":"Yes. The CD74HC251MT operates from 2V to 6V, so 5V supply is within its normal range. The 74HC family's input thresholds at 5V are compatible with standard 5V CMOS and TTL logic levels."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/CD74HC251MT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/CD74HC251MT 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}}