{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7C425-20VXCT","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7C425-20VXCT","canonicalUrl":"https://icboms.com/infineon/CY7C425-20VXCT","factsUrl":"https://icboms.com/api/mcp/products/CY7C425-20VXCT","rawCanonicalId":null},"summary":{"shortDescription":"Cypress CY7C425-20VXCT, Series CY7C, Asynchronous FIFO, 9K (1K x 9) memory, 20 ns access time, 50 MHz data rate, 4.5 V ~ 5.5 V supply, 0°C ~ 70°C, 28-SOJ surface mount.","salesMarkdown":"## Asynchronous FIFO — 9K buffer, 20 ns access, 50 MHz ceiling The CY7C425-20VXCT is a 9K (1K x 9) asynchronous FIFO with 20 ns access time and 50 MHz data rate. It operates from 4.5 V to 5.5 V supply and is rated 0°C to 70°C. The 20 ns access time means the FIFO can present valid data on the output bus within 20 ns of the read enable going active. For a system running a 50 MHz read clock (20 ns period), this timing leaves essentially no margin for board trace delay or logic propagation — the host controller must latch the data on the same clock edge that drives the read enable. Designs with slower controllers or relaxed timing can run comfortably below the 50 MHz ceiling, but the 20 ns access is the hard floor for cycle time. ## Commercial temperature only — indoor, controlled environments Not suitable for automotive under-hood, outdoor telecom cabinets, or factory floor applications without thermal management. The CY7C425-20VXCT is formally obsolete per Cypress's product lifecycle status. No official replacement order code is listed in the available documentation. ## No FWFT — standard asynchronous handshake only This FIFO does not support First-Word Fall-Through (FWFT) operation. Data is read using the standard asynchronous handshake: the empty flag goes low when data is available, the host asserts read enable, and data appears on the bus after the access time. No automatic data pre-fetch on the output — the controller must manage the read cycle explicitly. ## 28-SOJ surface mount — compact footprint for dense boards Packaged in a 28-lead SOJ (Small Outline J-lead) body, 0.300-inch wide, 7.62 mm pitch. Surface mount only — no through-hole variant in this order code.","metaTitle":"Cypress CY7C425-20VXCT Async FIFO, 9K (1K x 9), 20 ns, 50 MHz","metaDescription":"Cypress CY7C425-20VXCT asynchronous FIFO — 9K memory, 20 ns access time, 50 MHz data rate, 5 V supply, 0°C to 70°C. 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":"Tape & Reel (TR)","Function":"Asynchronous","Data Rate":"50MHz","Access Time":"20ns","Memory Size":"9K (1K 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":"7C425","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":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d1b3aa501e8d01556d95a050d492892d.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What are the specifications of CY7C425-20VXCT?","answer":"The CY7C425-20VXCT is a 9K (1K x 9) asynchronous FIFO with a 20 ns access time and 50 MHz maximum data rate. It operates from a 4.5 V to 5.5 V supply, draws 55 mA maximum supply current, and is rated for 0°C to 70°C. It supports depth and width expansion, retransmit capability, but not FWFT or programmable flags. Package is a 28-SOJ surface mount."},{"question":"Where to buy CY7C425-20VXCT?","answer":"As an obsolete part, the CY7C425-20VXCT is sourced to order through independent distribution. Submit an RFQ for current availability, pricing, and date code verification."},{"question":"Does CY7C425-20VXCT require FWFT support?","answer":"No, the CY7C425-20VXCT does not support First-Word Fall-Through. It uses a standard asynchronous read handshake — the controller must assert read enable and wait the access time for data to appear."},{"question":"Can I use CY7C425-20VXC instead of CY7C425-20VXCT?","answer":"The CY7C425-20VXC is the tube/tray packaged variant of the same die. The CY7C425-20VXCT is the Tape & Reel variant. Electrically and functionally they are identical — the difference is only the shipping medium. If your pick-and-place line is set up for Tape & Reel, the -VXCT is the correct order code."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7C425-20VXCT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7C425-20VXCT 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}}