{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7C421-20VXC","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7C421-20VXC","canonicalUrl":"https://icboms.com/infineon/CY7C421-20VXC","factsUrl":"https://icboms.com/api/mcp/products/CY7C421-20VXC","rawCanonicalId":null},"summary":{"shortDescription":"Infineon CY7C series asynchronous FIFO, CY7C421-20VXC, 4.5K (512 x 9) memory, 20 ns access time, 50 MHz data rate, 28-SOJ package, tube.","salesMarkdown":"## Obsolete FIFO — sourcing through independent channels The CY7C421-20VXC: This part is sourced to order against an RFQ through independent surplus channels. ## Memory organization and key timing The CY7C421-20VXC is a 4.5K (512 x 9) asynchronous FIFO memory. The 9-bit width supports parity or control bit alongside the data byte, common in datacom and telecom buffer applications. Access time is 20 ns, and the maximum data rate is 50 MHz. The 20 ns access time sets the read-cycle floor — the downstream logic must latch data within that window after the read-enable edge. ## Supply, temperature, and package Housed in a 28-SOJ (Small Outline J-Lead) package, 0.300-inch body width, 7.62 mm. The J-lead footprint saves board space compared to a DIP but requires a reflow solder profile compatible with SOIC-28 land patterns.","metaTitle":"Infineon CY7C421-20VXC FIFO, 4.5K (512x9), 20ns, 50MHz","metaDescription":"Infineon CY7C421-20VXC asynchronous FIFO, 4.5K (512 x 9), 20ns access time, 50MHz data rate, 28-SOJ.","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":"Asynchronous","Data Rate":"50MHz","Access Time":"20ns","Memory Size":"4.5K (512 x 9)","FWFT Support":"No","Mounting Type":"Surface Mount","Expansion Type":"Depth, Width","Package / Case":"28-BSOJ (0.300\\\", 7.62mm Width)","Product Status":"Obsolete","Bus Directional":"Uni-Directional","lifecycle_stage":"eol_hot","Voltage - Supply":"4.5 V ~ 5.5 V","Base Product Number":"7C421","Operating Temperature":"0°C~70°C","Retransmit Capability":"Yes","Current - Supply (Max)":"55mA","Supplier Device Package":"28-SOJ","Programmable Flags Support":"No"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.4500","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/4ff2b25f88134e2a3806033ba16d7ff7.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is CY7C421-20VXC obsolete and where can I buy it?","answer":"Yes, the CY7C421-20VXC is obsolete per Infineon's lifecycle status. It is no longer manufactured."},{"question":"What are the specifications of CY7C421-20VXC?","answer":"Supports retransmit and depth/width expansion."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7C421-20VXC","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7C421-20VXC when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:18:48.884Z","lastPublished":"2026-07-21T02:18:48.884Z","indexable":true}}