{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7C4211V-15AXI","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7C4211V-15AXI","canonicalUrl":"https://icboms.com/infineon/CY7C4211V-15AXI","factsUrl":"https://icboms.com/api/mcp/products/CY7C4211V-15AXI","rawCanonicalId":null},"summary":{"shortDescription":"Infineon CY7C4211V-15AXI synchronous FIFO, 66.7 MHz data rate, 10 ns access time, 4.5 Kbit (512 x 9), 3 V–3.6 V supply, -40°C to 85°C, 32-TQFP (7x7) package, Tray.","salesMarkdown":"## Synchronous FIFO at 66.7 MHz — 4.5 Kbit buffer for rate-matching and data staging The Infineon CY7C4211V-15AXI is a synchronous FIFO memory from the CY7C family, organized as 512 words by 9 bits wide for a total of 4.5 Kbit. The 9-bit width accommodates an eighth data bit or a parity/control flag alongside the byte-wide data path, which is typical for telecom frame buffers, DSP data staging, or PCI bus-rate matching where the extra bit carries sideband information. ## 66.7 MHz clock and 10 ns access — timing margin for synchronous buses At 66.7 MHz the clock period is 15 ns, so the 10 ns access leaves 5 ns of setup margin before the next clock edge — enough for most 3.3 V logic families without adding pipeline stages. If the receiving device has a tighter setup requirement, the 10 ns access still gives headroom for board trace delay and fan-out loading. The synchronous architecture eliminates the dead cycles associated with asynchronous FIFOs on read-to-write turnaround, which matters when the FIFO sits between two clock domains running at the same nominal frequency but with phase drift. ## Depth and width expansion — daisy-chain for larger buffers The CY7C4211V-15AXI supports expansion in both depth and width. Depth expansion chains multiple devices by cascading the full-flag and read-enable signals, building a larger FIFO without external logic — useful when 512 words is insufficient for a packet buffer or line accumulator. Width expansion pairs two or more devices with the same clock and control signals to create a wider data path (e.g., 18 bits from two 9-bit parts). The retransmit capability allows the FIFO to re-read data from the beginning without a full reset, which is handy for protocol retry buffers or test-pattern loops. Note that programmable flags and first-word fall-through (FWFT) are not supported, so the empty/full flags are fixed at the boundary states — the host must poll or interrupt on these boundaries rather than set custom thresholds. The CY7C4211V-15AXI is listed as Obsolete. No official replacement part number is recorded in the lifecycle data, so there is no direct pin-compatible successor from Infineon or Cypress. For a repair or a last-time-build run, the CY7C4211V-15AXI remains available on the spot market while inventory lasts.","metaTitle":"CY7C4211V-15AXI synchronous FIFO, 66.7 MHz, 4.5 Kbit","metaDescription":"Infineon CY7C4211V-15AXI synchronous FIFO: 66.7 MHz data rate, 10 ns access, 4.5 Kbit (512 x 9), 3 V–3.6 V, -40°C to 85°C, 32-TQFP.","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":"Tray","Function":"Synchronous","Data Rate":"66.7MHz","Access Time":"10ns","Memory Size":"4.5K (512 x 9)","FWFT Support":"No","Mounting Type":"Surface Mount","Expansion Type":"Depth, Width","Package / Case":"32-TQFP","Product Status":"Obsolete","Bus Directional":"Uni-Directional","lifecycle_stage":"eol_hot","Voltage - Supply":"3 V ~ 3.6 V","Base Product Number":"7C4211","Operating Temperature":"-40°C ~ 85°C","Retransmit Capability":"Yes","Current - Supply (Max)":"-","Supplier Device Package":"32-TQFP (7x7)","Programmable Flags Support":"No"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$14.1200","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/62dcb76eba7347429b991a76494e1063.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is CY7C4211V-15AXI obsolete?","answer":"Yes, the CY7C4211V-15AXI is listed as Obsolete. No official replacement part is recorded, so it must be sourced through surplus or broker channels."},{"question":"Does CY7C4211V-15AXI support first-word fall-through?","answer":"No, the CY7C4211V-15AXI does not support first-word fall-through (FWFT). The first word appears on the outputs after the read enable is asserted, not automatically on the bus."},{"question":"How does CY7C4211V-15AXI compare to similar FIFO memories?","answer":"Compared to asynchronous FIFOs of similar density (e.g., the IDT7201 series), the CY7C4211V-15AXI's synchronous clocking eliminates dead cycles on read-to-write transitions and supports higher data rates (66.7 MHz vs. typical 20–40 MHz for async). The trade-off is the lack of programmable flags and FWFT, which some newer synchronous FIFOs offer. For a drop-in replacement, no direct pin-compatible part exists — evaluate the IDT72V211 or CY7C42xxV series if a board spin is acceptable."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7C4211V-15AXI","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7C4211V-15AXI 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}}