{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7C4225-15AXCT","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7C4225-15AXCT","canonicalUrl":"https://icboms.com/infineon/CY7C4225-15AXCT","factsUrl":"https://icboms.com/api/mcp/products/CY7C4225-15AXCT","rawCanonicalId":null},"summary":{"shortDescription":"Cypress CY7C series, Synchronous FIFO, CY7C4225-15AXCT, 18K (1K x 18) memory, 66.7 MHz data rate, 10 ns access time, 4.5 V ~ 5.5 V supply, 0°C~70°C, 64-LQFP, Tape & Reel.","salesMarkdown":"## Synchronous FIFO for clock-domain bridging It is designed for buffering data between two clock domains in digital systems — think FPGA-to-processor links, DSP data pipelines, or network packet queues where you need a clean read/write handshake without dead cycles. At 66.7 MHz, the 10 ns access time gives you roughly 5 ns of setup margin after the clock edge — enough for most 5 V logic families (HCT, LVT, or classic ASIC I/O) without adding wait states. If your system runs at the same clock rate but uses slower PLD outputs, budget the access time against the combined propagation delay through the source register and trace flight time. ## Obsolete — plan the replacement now For new designs or volume production, you will need to qualify a replacement — typically a modern synchronous FIFO from the same 5 V supply family, or a dual-clock FIFO IP block inside an FPGA. ## Package and supply details for the layout Housed in a 64-LQFP (supplier device package 64-TQFP, 14x14 mm body), this is a surface-mount part with 0.5 mm pitch. Maximum supply current is 45 mA. ## Depth and width expansion — no FWFT The part supports depth and width expansion via cascading multiple devices, but it does not offer First-Word Fall-Through (FWFT) operation. If your design relies on FWFT for zero-latency reads, this is not the right FIFO — look at the Cypress CY7C42X5V series instead. Retransmit capability is present, and programmable flags are supported, giving you flexible almost-full/almost-empty thresholds.","metaTitle":"Cypress CY7C4225-15AXCT Synchronous FIFO, 18K (1K x 18)","metaDescription":"Cypress CY7C4225-15AXCT synchronous FIFO memory, 18K (1K x 18), 66.7 MHz data rate, 10 ns access time.","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 (1K x 18)","FWFT Support":"No","Mounting Type":"Surface Mount","Expansion Type":"Depth, Width","Package / Case":"64-LQFP","Product Status":"Obsolete","Bus Directional":"Uni-Directional","lifecycle_stage":"eol_hot","Voltage - Supply":"4.5 V ~ 5.5 V","Base Product Number":"7C4225","Operating Temperature":"0°C~70°C","Retransmit Capability":"Yes","Current - Supply (Max)":"45mA","Supplier Device Package":"64-TQFP (14x14)","Programmable Flags Support":"Yes"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/1856114dd8a777112a8d90d2bbbb7108.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is CY7C4225-15AXCT obsolete?","answer":"Yes, the CY7C4225-15AXCT is listed as Obsolete. Cypress (Infineon) no longer produces it, and there is no official direct replacement."},{"question":"What is the direct replacement for CY7C4225-15AXCT?","answer":"No official direct replacement is listed in the manufacturer's records. For a pin-compatible alternative within the same Cypress FIFO family, you would need to evaluate a similar synchronous FIFO from the CY7C42X5V series (which adds FWFT support) or a modern dual-clock FIFO from IDT/Renesas. Neither is a drop-in without verifying the pinout and timing."},{"question":"What voltage does CY7C4225-15AXCT use?","answer":"Do not run it from a 3.3 V rail without a level translator."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7C4225-15AXCT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7C4225-15AXCT 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}}