{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7C4271-10JC","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7C4271-10JC","canonicalUrl":"https://icboms.com/infineon/CY7C4271-10JC","factsUrl":"https://icboms.com/api/mcp/products/CY7C4271-10JC","rawCanonicalId":null},"summary":{"shortDescription":"Cypress CY7C4271-10JC synchronous FIFO, 288K (32K x 9), 8 ns access time, 100 MHz data rate, 4.5 V to 5.5 V supply, 0°C to 70°C, 32-PLCC (J-Lead) surface mount.","salesMarkdown":"## Synchronous FIFO — 288K (32K x 9) at 100 MHz The Cypress CY7C4271-10JC is a synchronous FIFO memory from the CY7C series, organized as 32K words by 9 bits (288K total). It supports a 100 MHz data rate with an 8 ns access time, making it suitable for high-speed data buffering in telecom, datacom, and video processing applications where sustained throughput and deterministic latency matter. The 9-bit width is notable — the extra bit is often used for parity or control signaling alongside the 8-bit data word. ## 5 V supply — 3.3 V compatibility requires level shifting Its inputs and outputs are 5 V logic levels. If your system runs on 3.3 V, direct connection will violate the input thresholds — you need external level translators or a separate 5 V rail for this FIFO. This is a common oversight when sourcing a legacy FIFO for a newer design. ## 32-PLCC footprint — legacy surface-mount package Housed in a 32-lead PLCC (J-Lead) package (supplier device package 32-PLCC, 11.43x13.97 mm), this is a legacy surface-mount footprint. The J-Lead form factor is still manufacturable but less common in modern high-density designs. If you are retrofitting an existing board, the footprint is standard; for a new layout, consider whether a newer FIFO in a QFP or BGA package offers a smaller board area. If your application sees temperature extremes, look for a FIFO with an extended temperature grade. New production has ceased; availability is limited to surplus inventory and broker channels.","metaTitle":"CY7C4271-10JC Cypress FIFO, 288K (32K x 9), 8 ns, 100 MHz","metaDescription":"Cypress CY7C4271-10JC synchronous FIFO memory, 288K (32K x 9), 8 ns access time, 100 MHz data rate, 5V supply, 32-PLCC, 0°C to 70°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":"Tube","Function":"Synchronous","Data Rate":"100MHz","Access Time":"8ns","Memory Size":"288K (32K 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":"7C4271","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":"Is the CY7C4271-10JC compatible with 3.3V logic?","answer":"No. Direct connection to 3.3 V logic will violate input thresholds; level translation is required."},{"question":"What is the replacement for CY7C4271-10JC because it is obsolete?","answer":"Cypress/Infineon has not published an official direct replacement for the CY7C4271-10JC. For a pin-compatible alternative within the same CY7C family, review the CY7C42xx series synchronous FIFOs — parametric differences (depth, speed, package) must be verified against your design. We can assist with cross-reference research on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7C4271-10JC","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7C4271-10JC 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}}