{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7C4235V-15ASC","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7C4235V-15ASC","canonicalUrl":"https://icboms.com/infineon/CY7C4235V-15ASC","factsUrl":"https://icboms.com/api/mcp/products/CY7C4235V-15ASC","rawCanonicalId":null},"summary":{"shortDescription":"Infineon Technologies CY7C Series synchronous FIFO, 36K (2K x 18), 66.7 MHz data rate, 11 ns access time, 3 V ~ 3.6 V supply, 64-LQFP, bag packaging.","salesMarkdown":"## FIFO fit and board integration The CY7C4235V-15ASC is a synchronous FIFO from Infineon's CY7C series, organized as 2K words by 18 bits for a total of 36 Kbit of storage. The 18-bit word width matches a byte-plus-parity or 16-bit data bus with two control/status bits — common in telecom or packet-buffer applications where the extra bits carry sideband flags. Packaged in a 64-LQFP (supplier device package 64-TQFP, 10x10 mm), the 0.5 mm pitch demands a 4-layer PCB for reliable fan-out of all 64 pins. ## Timing and flow-control decisions With a 66.7 MHz data rate and 11 ns access time, the read-cycle window is tight — the downstream logic must latch data within 11 ns of the read clock edge, or the bus margin disappears. The synchronous clocked operation (no strobe handshake) means both read and write clocks must be free-running and phase-managed; a clock jitter above 100 ps may violate setup/hold at the FIFO inputs. Programmable almost-full and almost-empty flags let the system controller set flow-control thresholds at configurable levels, reducing the need for constant polling. Retransmit capability allows rereading a data packet without a full FIFO reset — useful in error-retry data paths where a corrupted word must be re-sent. Note that FWFT (First-Word Fall-Through) is not supported, so the first word written is not available on the output until the first read clock edge after the first read enable — budget one clock cycle of latency. Depth and width expansion is supported, so multiple CY7C4235V-15ASC devices can be cascaded for deeper or wider buffers without external glue logic. The uni-directional bus means data flows one way — not suitable for bidirectional data paths without external transceivers. RoHS compliance is standard for Infineon's CY7C series, but specific compliance documentation (REACH, UL, IEC) should be requested at quote time as it varies by date code.","metaTitle":"Infineon CY7C4235V-15ASC FIFO, 36K (2K x 18), 66.7 MHz","metaDescription":"Infineon CY7C4235V-15ASC synchronous FIFO, 36K (2K x 18), 66.7 MHz data rate, 11 ns access time, 3-3.6 V, 64-LQFP. 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":"Bag","Function":"Synchronous","Data Rate":"66.7MHz","Access Time":"11ns","Memory Size":"36K (2K 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":"3 V ~ 3.6 V","Base Product Number":"7C4235","Operating Temperature":"0°C ~ 70°C","Retransmit Capability":"Yes","Current - Supply (Max)":"30mA","Supplier Device Package":"64-TQFP (10x10)","Programmable Flags Support":"Yes"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/752749882f9a85cd674660298054106b.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the memory size and organization of the CY7C4235V-15ASC?","answer":"The CY7C4235V-15ASC is a 36 Kbit synchronous FIFO organized as 2K words by 18 bits. The 18-bit word width suits byte-plus-parity or 16-bit data buses with two sideband control bits."},{"question":"What package does the CY7C4235V-15ASC use?","answer":"It comes in a 64-LQFP package (supplier device package 64-TQFP, 10x10 mm). The 0.5 mm pitch requires a 4-layer PCB for reliable fan-out."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7C4235V-15ASC","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7C4235V-15ASC when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:19:09.573Z","lastPublished":"2026-07-21T02:19:09.573Z","indexable":true}}