{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY74FCT257ATD","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"CY74FCT257ATD","canonicalUrl":"https://icboms.com/texas-instruments/CY74FCT257ATD","factsUrl":"https://icboms.com/api/mcp/products/CY74FCT257ATD","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74FCT series multiplexer, CY74FCT257ATD, 4 x 2:1 circuit, 16-SOIC surface mount package, 4.75V-5.25V single supply, -40°C to 85°C industrial temperature range.","salesMarkdown":"## 4 x 2:1 multiplexer for data-path selection The Texas Instruments CY74FCT257ATD is a 4 x 2:1 multiplexer from the 74FCT logic family — it selects one of two 4-bit input buses onto a single 4-bit output bus, controlled by a common select line. ## Output drive and signal integrity The output stage sources 32 mA and sinks 64 mA — that's enough drive to fan out to multiple CMOS loads on a short backplane trace without a buffer. The asymmetric sink/source ratio matches the typical loading of a TTL-compatible input bus where the low-level current demand is higher. The 0.154-inch pitch leaves room for a probe clip during bring-up.","metaTitle":"Texas Instruments CY74FCT257ATD 4x2:1 Multiplexer, 16-SOIC","metaDescription":"Active Texas Instruments CY74FCT257ATD 4 x 2:1 multiplexer, 4.75V-5.25V supply, -40°C to 85°C, 32mA/64mA output drive, 16-SOIC. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":"74FCT","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Type":"Multiplexer","Series":"74FCT","Circuit":"4 x 2:1","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":"-40°C ~ 85°C","Voltage Supply Source":"Single Supply","Supplier Device Package":"16-SOIC","Current - Output High, Low":"32mA, 64mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.01","priceTiers":[{"qty":1,"price":"$1.01000","currency":"USD"},{"qty":10,"price":"$0.90100","currency":"USD"},{"qty":25,"price":"$0.85480","currency":"USD"},{"qty":100,"price":"$0.70210","currency":"USD"},{"qty":250,"price":"$0.65636","currency":"USD"},{"qty":500,"price":"$0.58004","currency":"USD"},{"qty":1000,"price":"$0.45792","currency":"USD"},{"qty":2500,"price":"$0.43200","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/97086a84a3088c56dec9d3e1f67ecb17.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/CY74FCT257ATD/alternatives.json"},"ai":{"faq":[{"question":"What is the CY74FCT257ATD used for?","answer":"It is a 4 x 2:1 multiplexer that selects between two 4-bit input buses. Common applications include data-path selection in processor or FPGA systems, bus isolation, and signal routing in industrial control logic."},{"question":"Can the CY74FCT257ATD replace a DS90CP22MT/NOPB in an existing design?","answer":"No — the DS90CP22MT/NOPB is a 1 x 2:2 crosspoint switch with a different function and pinout. The CY74FCT257ATD is a 4 x 2:1 multiplexer and will not drop in without a board spin."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/CY74FCT257ATD","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/CY74FCT257ATD 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}}