{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7C4251-15AXCT","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7C4251-15AXCT","canonicalUrl":"https://icboms.com/infineon/CY7C4251-15AXCT","factsUrl":"https://icboms.com/api/mcp/products/CY7C4251-15AXCT","rawCanonicalId":null},"summary":{"shortDescription":"Infineon CY7C series synchronous FIFO memory, CY7C4251-15AXCT, 72K (8K x 9), 66.7 MHz data rate, 10 ns access time, 4.5 V to 5.5 V supply, 0°C to 70°C, 32-TQFP (7x7), Tape & Reel.","salesMarkdown":"## Synchronous FIFO for 5 V data buffering The Infineon CY7C4251-15AXCT is a synchronous FIFO memory organized as 72K (8K x 9) words, designed for high-speed data buffering in systems that need to match data rates between a producer and a consumer clock domain. ## Obsolete — last-time-buy and sourcing The 66.7 MHz data rate and 10 ns access time define the throughput ceiling — this FIFO can sustain back-to-back reads and writes at that clock rate without dead cycles, which is the main reason to pick a synchronous FIFO over an asynchronous one. The 72K (8K x 9) depth gives you 8,192 words of 9 bits each; the extra bit is typically used for a parity or control flag. The Tape & Reel (TR) packaging is the shipping medium; the device itself is the TQFP. The footprint is standard for 32-pin TQFP, so layout is straightforward.","metaTitle":"Infineon CY7C4251-15AXCT Synchronous FIFO, 72K (8K x 9)","metaDescription":"Infineon CY7C4251-15AXCT synchronous FIFO memory: 72K (8K x 9), 66.7 MHz data rate, 10 ns access time, 32-TQFP, 0°C to 70°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Memory (DRAM / SRAM / Flash / EEPROM)"],"specifications":{"Mfr":"Infineon Technologies","Series":"CY7C","Package":"Tape & Reel (TR)","Function":"Synchronous","Data Rate":"66.7MHz","Access Time":"10ns","Memory Size":"72K (8K x 9)","FWFT Support":"No","Mounting Type":"Surface Mount","Expansion Type":"Depth, Width","Package / Case":"32-TQFP","Product Status":"Obsolete","Bus Directional":"Uni-Directional","lifecycle_stage":"eol_hot","Voltage - Supply":"4.5 V ~ 5.5 V","Base Product Number":"7C4251","Operating Temperature":"0°C ~ 70°C","Retransmit Capability":"No","Current - Supply (Max)":"35mA","Supplier Device Package":"32-TQFP (7x7)","Programmable Flags Support":"Yes"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/a7b146673824ba494f9688cebdc79959.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the replacement for CY7C4251-15AXCT?","answer":"No official replacement is listed on the record. The CY7C series includes other synchronous FIFO densities, but a direct pin-compatible drop-in is not confirmed. A design review is needed to select a functionally equivalent FIFO with the same 8K x 9 organization and 5 V supply."},{"question":"Is CY7C4251-15AXCT obsolete?","answer":"Yes, the lifecycle status is obsolete. There is no last-time-buy window currently active; remaining stock is available only through the surplus and broker channel."},{"question":"What is the access time of CY7C4251-15AXCT?","answer":"The access time is 10 ns, which supports the 66.7 MHz synchronous data rate."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7C4251-15AXCT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7C4251-15AXCT 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}}