{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7C4231-15JXCT","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7C4231-15JXCT","canonicalUrl":"https://icboms.com/infineon/CY7C4231-15JXCT","factsUrl":"https://icboms.com/api/mcp/products/CY7C4231-15JXCT","rawCanonicalId":null},"summary":{"shortDescription":"Infineon Technologies CY7C series synchronous FIFO, CY7C4231-15JXCT, 18K (2K x 9), 66.7 MHz data rate, 10 ns access time, 32-PLCC (J-Lead), 4.5 V–5.5 V supply, 0°C–70°C.","salesMarkdown":"## Synchronous FIFO in a 32-PLCC footprint The CY7C4231-15JXCT is a synchronous FIFO from the CY7C series, organized as 18K (2K x 9) and clocked at 66.7 MHz with a 10 ns access time. ## 66.7 MHz clock and 10 ns access — the timing budget A 66.7 MHz data rate with 10 ns access time means the FIFO can sustain one read or write per clock cycle at full speed — the access time is the window the controller must respect for the first word after a read request. At 66.7 MHz the cycle time is 15 ns, so the 10 ns access leaves 5 ns of setup margin for the downstream logic, assuming zero board delay. The 2K x 9 organization (18 Kbit) provides 2,048 words of 9 bits each — the ninth bit is often used as a parity or data-type flag in networking and telecom buffers. Depth and width expansion are supported, so multiple devices can cascade for larger buffers without external glue logic. Infineon lists the CY7C4231-15JXCT as Obsolete.","metaTitle":"Infineon CY7C4231-15JXCT synchronous FIFO, 18K, 66.7 MHz","metaDescription":"CY7C4231-15JXCT synchronous FIFO, 18K (2Kx9), 66.7 MHz, 10 ns access time, 32-PLCC. Obsolete — sourced to order via independent distribution. Request a quote.","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":"18K (2K x 9)","FWFT Support":"No","Mounting Type":"Surface Mount","Expansion Type":"Depth, Width","Package / Case":"32-LCC (J-Lead)","Product Status":"Obsolete","Bus Directional":"Uni-Directional","lifecycle_stage":"eol_hot","Voltage - Supply":"4.5 V ~ 5.5 V","Base Product Number":"7C4231","Operating Temperature":"0°C~70°C","Retransmit Capability":"No","Current - Supply (Max)":"35mA","Supplier Device Package":"32-PLCC (11.43x13.97)","Programmable Flags Support":"Yes"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$11.8700","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/b0115a44e89566724ee3f49375c67cf8.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is CY7C4231-15JXCT obsolete?","answer":"Yes, Infineon lists the CY7C4231-15JXCT as Obsolete. There is no official successor from the manufacturer."},{"question":"Where can I buy CY7C4231-15JXCT?","answer":"The CY7C4231-15JXCT is sourced to order through independent distribution and surplus channels."},{"question":"What is a direct replacement for CY7C4231-15JXCT?","answer":"A functionally equivalent FIFO from another vendor would require a board-level evaluation of the 32-PLCC footprint, supply voltage, and timing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7C4231-15JXCT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7C4231-15JXCT when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:18:47.927Z","lastPublished":"2026-07-21T02:18:47.927Z","indexable":true}}