{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MM74HC257J","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"MM74HC257J","canonicalUrl":"https://icboms.com/texas-instruments/MM74HC257J","factsUrl":"https://icboms.com/api/mcp/products/MM74HC257J","rawCanonicalId":null},"summary":{"shortDescription":"Fairchild MM74HC257J, 74HC series, Type Multiplexer, Circuit 4 x 2:1, Voltage - Supply 2V ~ 6V, Single Supply, Operating Temperature -55°C ~ 125°C, Current - Output High, Low 7.8mA, 7.8mA, Package Bulk.","salesMarkdown":"The Fairchild MM74HC257J is a 74HC-series quad 2-input multiplexer with a single supply range of 2V to 6V. It routes one of two 4-bit data sources to a common output, controlled by a select line and an output-enable gate. ## RoHS status — plan for leaded assembly It is acceptable for builds where leaded solder is permitted. No official successor is listed. The DIP package may have thinner availability than surface-mount variants. ## Output drive — what 7.8 mA means for the load The 7.8 mA output high and low current is the rated sink/source capability at the rated output voltage.","metaTitle":"MM74HC257J Multiplexer, 4 x 2:1, 2V~6V, -55°C~125°C","metaDescription":"MM74HC257J is a 74HC-series 4 x 2:1 multiplexer from Fairchild. Operates on 2V~6V single supply, -55°C~125°C. Active, RoHS non-compliant.","metaKeywords":null},"attributes":{"series":"74HC","packageCase":null,"mountingType":null,"rohsStatus":"RoHS non-compliant","productStatus":"Active","categoryPath":["DC-DC Power Modules"],"specifications":{"Type":"Multiplexer","Series":"74HC","Circuit":"4 x 2:1","Package":"Bulk","lifecycle_stage":"eol_hot","Voltage - Supply":"2V ~ 6V","Independent Circuits":"1","Operating Temperature":"-55°C ~ 125°C","Voltage Supply Source":"Single Supply","Current - Output High, Low":"7.8mA, 7.8mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.13","priceTiers":[{"qty":265,"price":"$1.13000","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/MM74HC257J/alternatives.json"},"ai":{"faq":[{"question":"What is the function of MM74HC257J?","answer":"It is a 4-bit 2-input multiplexer (4 x 2:1). It selects one of two 4-bit data buses and routes the chosen bus to the output, controlled by a single select line and an output-enable input."},{"question":"What is the closest functional second-source — SN74LS348N?","answer":"The SN74LS348N is a priority encoder (1 x 8:3), not a multiplexer. It is not a functional replacement for the MM74HC257J. For a second-source multiplexer, look at the 74HC257 from TI, NXP, or other manufacturers in the same DIP package."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/MM74HC257J","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/MM74HC257J when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T14:34:45.345Z","lastPublished":"2026-07-20T14:34:45.345Z","indexable":true}}