{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7C1328G-133AXI","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7C1328G-133AXI","canonicalUrl":"https://icboms.com/infineon/CY7C1328G-133AXI","factsUrl":"https://icboms.com/api/mcp/products/CY7C1328G-133AXI","rawCanonicalId":null},"summary":{"shortDescription":"Cypress CY7C1328G-133AXI synchronous SRAM, 4.5Mbit (256K x 18), 133 MHz clock, 4 ns access time, 3.15V-3.6V supply, -40°C to 85°C, 100-TQFP (14x20 mm) tray.","salesMarkdown":"## What this synchronous SRAM does on the board The Cypress CY7C1328G-133AXI is a 4.5 Mbit synchronous SRAM organized as 256K x 18 bits, clocked at 133 MHz with a 4 ns access time. This part is typically used as a high-speed buffer or cache in networking switches, telecom line cards, and industrial controllers where deterministic read/write latency at clock frequency is critical. ## 133 MHz and 4 ns access — what that means for timing closure The 133 MHz clock rate and 4 ns access time let this SRAM keep pace with high-throughput ASICs and FPGAs without inserting wait states. For a system architect, that 4 ns access window sets the setup-and-hold budget on the data bus; if your controller's output valid window is tighter than 4 ns, you'll need to account for board trace delay and clock skew. At 133 MHz, the synchronous pipeline registers the address and control signals on the rising edge, so the memory controller must meet the setup time relative to that edge — something to verify in your timing analysis. No further factory orders are accepted, and no last-time-buy window remains open. If this part is on your BOM, you are now in the surplus and independent-distribution channel. There is no official Cypress successor listed for this exact order code, so any replacement will require a pin-compatible or functionally equivalent alternative from a different vendor.","metaTitle":"Cypress CY7C1328G-133AXI 4.5Mbit Sync SRAM, 133 MHz, 4 ns","metaDescription":"Cypress CY7C1328G-133AXI synchronous SRAM: 4.5Mbit (256K x 18), 133 MHz clock, 4 ns access, -40°C to 85°C, 100-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":"-","Package":"Tray","Technology":"SRAM - Synchronous, SDR","Access Time":"4 ns","Memory Size":"4.5Mbit","Memory Type":"Volatile","Memory Format":"SRAM","Mounting Type":"Surface Mount","Package / Case":"100-LQFP","Product Status":"Obsolete","Clock Frequency":"133 MHz","lifecycle_stage":"eol_hot","Memory Interface":"Parallel","Voltage - Supply":"3.15V ~ 3.6V","Base Product Number":"CY7C1328","Memory Organization":"256K x 18","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"100-TQFP (14x20)","Write Cycle Time - Word, Page":"-"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/fae0211181bbfce32e8425332fa6280d.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is CY7C1328G-133AXI obsolete?","answer":"Yes, Cypress has marked the CY7C1328G-133AXI as obsolete. No further factory orders are accepted. It is available only through surplus and independent distribution channels."},{"question":"What is the equivalent replacement for CY7C1328G-133AXI?","answer":"Cypress has not published an official successor for this exact order code. A functionally equivalent replacement would need to match the 256K x 18 organization, 133 MHz clock, 4 ns access, 3.3 V supply, and 100-pin TQFP footprint. Check with your design team for a pin-compatible alternative from the same or another vendor."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7C1328G-133AXI","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7C1328G-133AXI 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}}