{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7C4251-10AXI","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7C4251-10AXI","canonicalUrl":"https://icboms.com/infineon/CY7C4251-10AXI","factsUrl":"https://icboms.com/api/mcp/products/CY7C4251-10AXI","rawCanonicalId":null},"summary":{"shortDescription":"Infineon (Cypress) CY7C4251-10AXI, Synchronous FIFO, 72K (8K x 9), 100 MHz Data Rate, 8 ns Access Time, 4.5 V to 5.5 V, -40°C to 85°C, 32-TQFP.","salesMarkdown":"## Synchronous FIFO for 5 V data-buffering pipelines The Infineon (formerly Cypress) CY7C4251-10AXI is a synchronous FIFO memory organized as 8K x 9 bits (72 Kbit total), designed for unidirectional data buffering in 5 V logic systems. It clocks at 100 MHz with an 8 ns access time, supporting depth and width expansion for wider or deeper queues without external logic. The 100 MHz data rate means the FIFO can sustain a 100 MHz read/write cycle on the same clock edge, with the first word appearing 8 ns after the rising edge. That 8 ns access time is the window the controller must meet for setup-and-hold. ## Obsolete — last-time-buy and surplus sourcing Buyers should verify stock position and lead time at quote time, and consider qualifying a pin-compatible synchronous FIFO from the same CY7C family for new production runs. ## 5 V supply and industrial temperature — deployment context Programmable flags are supported, which allows the designer to set almost-empty and almost-full thresholds for flow control without polling the status flags. No retransmit capability and no FWFT (First-Word Fall-Through) support — the first word is not available until the first read cycle completes.","metaTitle":"CY7C4251-10AXI Synchronous FIFO, 72K (8K x 9), 100 MHz, 8 ns","metaDescription":"Infineon (Cypress) CY7C4251-10AXI synchronous FIFO memory: 72K (8K x 9), 100 MHz data rate, 8 ns access time, 32-TQFP, -40°C to 85°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":"Tray","Function":"Synchronous","Data Rate":"100MHz","Access Time":"8ns","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":"-40°C ~ 85°C","Retransmit Capability":"No","Current - Supply (Max)":"40mA","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":"Is CY7C4251-10AXI obsolete? What is the replacement?","answer":"Yes, the CY7C4251-10AXI is obsolete per Infineon's product status. For new designs, consider a pin-compatible synchronous FIFO from the same CY7C family with similar 8K x 9 organization and 100 MHz data rate, but verify the exact footprint and timing compatibility against your BOM."},{"question":"Does CY7C4251-10AXI support full-word flag?","answer":"No, the CY7C4251-10AXI does not support FWFT (First-Word Fall-Through). It is a standard synchronous FIFO where the first word is not available until the first read cycle completes. It does support programmable flags for almost-empty and almost-full thresholds."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7C4251-10AXI","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7C4251-10AXI 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}}