{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CD74HCT251M","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"CD74HCT251M","canonicalUrl":"https://icboms.com/texas-instruments/CD74HCT251M","factsUrl":"https://icboms.com/api/mcp/products/CD74HCT251M","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74HCT series CMOS multiplexer, CD74HCT251M, 1 x 8:1 circuit, 4.5V-5.5V single supply, 4mA output drive, -55°C to 125°C, 16-SOIC package.","salesMarkdown":"## SOIC-16 footprint and board integration The CD74HCT251M comes in a 16-SOIC body measuring 0.154\" wide by 3.90 mm — the standard narrow SOIC footprint that routes out on a two-layer board without micro-vias. The 1.27 mm pin pitch is forgiving for hand-solder rework; a field-service kit with a fine-tip iron and flux pen can swap this part in under three minutes. The 4 mA source/sink per output drives one standard LSTTL load or a CMOS gate input — no buffer needed for a single fan-out. ## What the 8:1 mux does in a real circuit This is a single 8-channel to 1-line multiplexer with three address selects (A, B, C) and an active-low strobe. The 1 x 8:1 topology means you route eight digital signals — sensor interrupts, switch banks, or data lines — into one shared input on a microcontroller, saving GPIO pins. The strobe lets you cascade two of these into a 16:1 mux without external gating. If your board lives in a 0-70°C commercial box, the margin is still there; the HCT family's CMOS inputs with TTL-compatible thresholds mean it works with both 5 V logic families.","metaTitle":"Texas Instruments CD74HCT251M 74HCT 8:1 Multiplexer, 16-SOIC","metaDescription":"Texas Instruments CD74HCT251M 74HCT 8:1 multiplexer, 4.5V-5.5V supply, -55°C to 125°C, SOIC-16. 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":"Multiplexer","Series":"74HCT","Circuit":"1 x 8:1","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":"1","Operating Temperature":"-55°C ~ 125°C","Voltage Supply Source":"Single Supply","Supplier Device Package":"16-SOIC","Current - Output High, Low":"4mA, 4mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.3","priceTiers":[{"qty":1,"price":"$1.30000","currency":"USD"},{"qty":10,"price":"$1.16000","currency":"USD"},{"qty":25,"price":"$1.10120","currency":"USD"},{"qty":100,"price":"$0.90450","currency":"USD"},{"qty":250,"price":"$0.84552","currency":"USD"},{"qty":500,"price":"$0.74720","currency":"USD"},{"qty":1000,"price":"$0.58989","currency":"USD"},{"qty":2500,"price":"$0.55650","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/1f2e3cef6af1f9f38c1bf1bcaf8fa7c3.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/CD74HCT251M/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/CD74HCT251M","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/CD74HCT251M 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}}