{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7C4251-15AC","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7C4251-15AC","canonicalUrl":"https://icboms.com/infineon/CY7C4251-15AC","factsUrl":"https://icboms.com/api/mcp/products/CY7C4251-15AC","rawCanonicalId":null},"summary":{"shortDescription":"Infineon Technologies CY7C series synchronous FIFO, CY7C4251-15AC, 72K (8K x 9) memory, 10ns access time, 66.7MHz data rate, 4.5V-5.5V supply, 32-TQFP.","salesMarkdown":"The CY7C4251-15AC is marked Obsolete by Infineon Technologies. ## 10 ns access time and synchronous operation This is a synchronous FIFO with a 10 ns access time and a 66.7 MHz data rate — the access time sets the minimum read-cycle window, so the controller must meet that setup/hold timing to avoid data corruption on the bus. The 72K memory is organized as 8K x 9 bits, with the ninth bit often used for parity or data tagging in FIFO applications like rate-buffering between asynchronous clock domains. ## 32-TQFP package and board integration Housed in a 32-TQFP (7x7 mm) surface-mount package — the 0.8 mm pitch requires standard SMT assembly; no special via-in-pad or microvia fan-out is needed for a two-layer board. Supports depth and width expansion via the Expansion Type pins, and programmable flags are available for almost-full/almost-empty thresholds — useful for flow control in multi-FIFO designs.","metaTitle":"Infineon CY7C4251-15AC 72K FIFO, 10ns, 32-TQFP","metaDescription":"Infineon CY7C4251-15AC synchronous FIFO, 72K (8K x 9) memory, 10ns access time, 66.7MHz data rate. Obsolete — sourced to order against RFQ.","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":"Bag","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":"Where can I buy CY7C4251-15AC?","answer":"The CY7C4251-15AC is obsolete and sourced through independent distribution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7C4251-15AC","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7C4251-15AC when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:19:30.891Z","lastPublished":"2026-07-21T02:19:30.891Z","indexable":true}}