{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7C433-20JXCT","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7C433-20JXCT","canonicalUrl":"https://icboms.com/infineon/CY7C433-20JXCT","factsUrl":"https://icboms.com/api/mcp/products/CY7C433-20JXCT","rawCanonicalId":null},"summary":{"shortDescription":"Infineon Technologies CY7C Series asynchronous FIFO, CY7C433-20JXCT, 36K (4K x 9) memory size, 20 ns access time, 50 MHz data rate, 32-LCC (J-Lead) package, Tape & Reel.","salesMarkdown":"## Asynchronous FIFO for 5 V systems The CY7C433-20JXCT is a 36K (4K x 9) asynchronous FIFO from Infineon's CY7C series, designed for buffering data across clock domains in 5 V logic systems. Its 20 ns access time and 50 MHz data rate set the timing budget for read/write cycles in a backplane or data-acquisition front-end. ## What the 20 ns access time means for the bus With a 20 ns access time, the FIFO's data output becomes valid 20 ns after the read-enable edge — this sets the minimum read-cycle period at 20 ns plus the controller's setup time. The 50 MHz data rate ceiling means the FIFO can sustain back-to-back reads or writes at 20 ns intervals, matching the cycle time of many CPLD or FPGA interfaces in the same 5 V domain. The 4K x 9 organization stores 4096 9-bit words — the ninth bit is typically used for parity or a control flag separate from the data bus. Retransmit capability allows resetting the internal read pointer to the beginning of the FIFO without a full reset, useful for retrying a corrupted data block. The commercial temperature range (0°C to 70°C) limits it to indoor, temperature-controlled environments — no extended or industrial temp grade on this variant. Infineon lists the CY7C433-20JXCT as Obsolete. This part is sourced through independent distribution channels; quantities are lot-specific and confirmed at RFQ. The 32-PLCC (11.43x13.97 mm) J-lead package was common for mid-2000s FIFO designs. The Tape & Reel packaging suggests original reel quantities for automated assembly, though surplus stock may arrive in cut-tape or tube as well.","metaTitle":"Infineon CY7C433-20JXCT 36K FIFO, 20 ns, 32-PLCC","metaDescription":"Obsolete Infineon CY7C433-20JXCT asynchronous FIFO, 36K (4K x 9), 20 ns access, 50 MHz. Sourced to order against RFQ through independent channels.","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":"36K (4K x 9)","FWFT Support":"No","Mounting Type":"Surface Mount","Expansion Type":"Depth, Width","Package / Case":"32-LCC (J-Lead)","Product Status":"Obsolete","Bus Directional":"Uni-Directional","lifecycle_stage":"eol_hot","Voltage - Supply":"4.5 V ~ 5.5 V","Base Product Number":"7C433","Operating Temperature":"0°C~70°C","Retransmit Capability":"Yes","Current - Supply (Max)":"55mA","Supplier Device Package":"32-PLCC (11.43x13.97)","Programmable Flags Support":"No"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/c6f17e93a3e6656c3e996644151f8e4d.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy the CY7C433-20JXCT?","answer":"The CY7C433-20JXCT is obsolete and sourced through independent distribution. Submit an RFQ for current availability and pricing; quantities are confirmed at quote time."},{"question":"What is the closest pin-compatible alternative to the CY7C433-20JXCT?","answer":"No official pin-compatible alternative or successor is recorded from Infineon for this specific order code. The CY7C series includes other densities and speeds, but their pinouts and timing may differ — verify against the original BOM position before substitution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7C433-20JXCT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7C433-20JXCT when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:20:26.217Z","lastPublished":"2026-07-21T02:20:26.217Z","indexable":true}}