{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7C4251V-15AXCT","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7C4251V-15AXCT","canonicalUrl":"https://icboms.com/infineon/CY7C4251V-15AXCT","factsUrl":"https://icboms.com/api/mcp/products/CY7C4251V-15AXCT","rawCanonicalId":null},"summary":{"shortDescription":"Cypress CY7C4251V-15AXCT synchronous FIFO, 72K (8K x 9) memory, 11 ns access time, 66.7 MHz data rate, 3 V to 3.6 V supply, 32-TQFP (7x7) package, commercial temperature range 0°C to 70°C.","salesMarkdown":"The Cypress CY7C4251V-15AXCT is a synchronous FIFO memory from the CY7C series, organized as 8K x 9 bits (72 Kbit total). It operates at a 66.7 MHz data rate with an 11 ns access time, making it suitable for buffering data between asynchronous clock domains or rate-matching in telecom, networking, and video processing equipment. The 9-bit width supports parity alongside an 8-bit data byte. It is a unidirectional, depth- and width-expandable FIFO without FWFT (First-Word Fall-Through) or programmable flags. Retransmit capability is not supported. ## Package and temperature grade — board-fit details If the reel's moisture-barrier bag has been opened, bake before reflow to avoid popcorning. ## Obsolete — sourcing and replacement reality The CY7C4251V-15AXCT is officially obsolete. For new designs, a current-generation synchronous FIFO from Cypress (now Infineon) or a pin-compatible alternative from another vendor should be evaluated.","metaTitle":"CY7C4251V-15AXCT Synchronous FIFO, 72K, 11ns, 66.7MHz","metaDescription":"Cypress CY7C4251V-15AXCT synchronous FIFO memory: 72K (8K x 9), 11ns access time, 66.7MHz data rate, 3V-3.6V supply, 32-TQFP.","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":"11ns","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":"3 V ~ 3.6 V","Base Product Number":"7C4251","Operating Temperature":"0°C~70°C","Retransmit Capability":"No","Current - Supply (Max)":"20mA","Supplier Device Package":"32-TQFP (7x7)","Programmable Flags Support":"No"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/06df22868d8a34fd15e9034e48ed2c13.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is CY7C4251V-15AXCT obsolete?","answer":"Yes, the CY7C4251V-15AXCT is listed as obsolete. It is not recommended for new designs."},{"question":"What is the replacement for CY7C4251V-15AXCT?","answer":"No official replacement or cross-reference part is recorded for the CY7C4251V-15AXCT. For a new design, consider a current-generation synchronous FIFO from Cypress/Infineon or an equivalent from another vendor with similar depth, width, and speed."},{"question":"What is the access time of CY7C4251V-15AXCT?","answer":"The CY7C4251V-15AXCT has an 11 ns access time, supporting a 66.7 MHz data rate."},{"question":"Can CY7C4251V-15AXCT be used in new designs?","answer":"No. The part is obsolete, so it should not be designed into new products. It is only suitable for repair or replacement in existing BOMs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7C4251V-15AXCT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7C4251V-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}}