{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7C4261-15JXC","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7C4261-15JXC","canonicalUrl":"https://icboms.com/infineon/CY7C4261-15JXC","factsUrl":"https://icboms.com/api/mcp/products/CY7C4261-15JXC","rawCanonicalId":null},"summary":{"shortDescription":"Infineon Technologies CY7C series synchronous FIFO, CY7C4261-15JXC, 144K (16K x 9), 66.7 MHz data rate, 10 ns access time, 32-PLCC, tube.","salesMarkdown":"## 66.7 MHz synchronous FIFO — 144K buffer for unidirectional data paths The CY7C4261-15JXC is a synchronous FIFO from Infineon's CY7C series, organized as 16K x 9 bits (144K total). It clocks at 66.7 MHz with a 10 ns access time, meaning the read/write cycle repeats every 15 ns — the limiting factor for throughput in a unidirectional data buffer is this cycle time, not the memory depth. ## Operating envelope — supply, temperature, and current budget The commercial temperature grade (0 °C to 70 °C) suits indoor equipment and lab instrumentation; the 35 mA max supply draw means the FIFO's contribution to the board-level thermal budget is negligible even in a densely populated PLCC footprint. ## Package and board-fit — 32-PLCC with J-leads Housed in a 32-lead PLCC (J-lead) package, supplier device package size 11.43 x 13.97 mm. The J-lead form factor allows socketed or soldered mounting on a standard surface-mount pad layout; the 1.27 mm pitch is hand-solderable with a fine tip and does not require a stencil for prototyping. No exposed thermal pad — the die heat dissipates through the leads and the board copper. ## Feature set — depth/width expansion, programmable flags, no FWFT Supports depth and width expansion, so multiple devices cascade for deeper or wider buffers without external logic. Programmable flags let the system set almost-empty and almost-full thresholds to match the host controller's DMA latency. No FWFT (First-Word Fall-Through) and no retransmit capability — the first word is not available on the output pins until the first read clock after the write cycle, and the data cannot be re-read once read out. ## Lifecycle reality — obsolete, no successor on record Infineon lists the CY7C4261-15JXC as obsolete. No official successor part number is published.","metaTitle":"CY7C4261-15JXC Synchronous FIFO, 66.7MHz, 10ns, 144K","metaDescription":"Infineon CY7C4261-15JXC synchronous FIFO, 66.7 MHz, 10 ns access, 144K (16K x 9). Obsolete — sourced to order against RFQ through independent channels.","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":"Tube","Function":"Synchronous","Data Rate":"66.7MHz","Access Time":"10ns","Memory Size":"144K (16K 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":"7C4261","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":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/20c5e88916ab8bb4d871fe92ddbb00ea.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How do I get current pricing and availability for CY7C4261-15JXC?","answer":"Submit an RFQ for the required quantity; the quote will reflect current market conditions through independent distribution."},{"question":"What is the memory size and organization of CY7C4261-15JXC?","answer":"The FIFO is organized as 16K words by 9 bits, giving a total memory size of 144 Kbits. The 9-bit width accommodates an 8-bit data byte plus a parity or control bit."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7C4261-15JXC","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7C4261-15JXC when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:19:45.787Z","lastPublished":"2026-07-21T02:19:45.787Z","indexable":true}}