{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7C1338B-100AC","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7C1338B-100AC","canonicalUrl":"https://icboms.com/infineon/CY7C1338B-100AC","factsUrl":"https://icboms.com/api/mcp/products/CY7C1338B-100AC","rawCanonicalId":null},"summary":{"shortDescription":"Cypress CY7C1338B-100AC synchronous SRAM, 4Mbit (128K x 32), 8 ns access time, 100 MHz clock frequency, parallel interface, 3.15V–3.6V supply, 100-TQFP (14x20), 0°C–70°C.","salesMarkdown":"## 8 ns access, 100 MHz clock — synchronous SRAM for wide-word pipelines The Cypress CY7C1338B-100AC is a 4 Mbit synchronous SRAM organized as 128K x 32 bits, with a single-cycle burst capability driven by a 100 MHz clock and an 8 ns access time. The synchronous SDR (single data rate) interface simplifies timing closure at the board level — the address and control signals are captured on the rising clock edge, so the bus controller only needs to manage setup and hold relative to that single edge. ## Obsolete — last-time-buy and surplus sourcing This part carries an official obsolete status. Cypress has discontinued the CY7C1338B-100AC, so new production through the original manufacturer is no longer available. For sustainment of existing designs — particularly in telecom infrastructure, industrial controllers, or test equipment that already has the 100-TQFP footprint laid out — the only supply channel is last-time-buy inventory or qualified surplus from independent distribution. No direct replacement part number has been assigned by Cypress for this specific speed and package variant, so any pin-compatible alternative must be validated against the 8 ns access time and 100 MHz clock requirements. ## 100-TQFP footprint and supply rails The CY7C1338B-100AC is supplied in a 100-TQFP package with a 14x20 mm body. The supply voltage range is 3.15 V to 3.6 V, which aligns with a nominal 3.3 V rail — no additional regulator needed if the board already runs 3.3 V. The parallel memory interface uses standard SRAM control signals (chip enable, output enable, write enable, and burst control), so it integrates directly with most 32-bit bus masters without glue logic.","metaTitle":"CY7C1338B-100AC Cypress 4Mbit Sync SRAM, 8 ns, 100 MHz","metaDescription":"Cypress CY7C1338B-100AC synchronous SRAM: 4Mbit (128K x 32), 8 ns access, 100 MHz clock, 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":"8 ns","Memory Size":"4Mbit","Memory Type":"Volatile","Memory Format":"SRAM","Mounting Type":"Surface Mount","Package / Case":"100-LQFP","Product Status":"Obsolete","Clock Frequency":"100 MHz","lifecycle_stage":"eol_hot","Memory Interface":"Parallel","Voltage - Supply":"3.15V ~ 3.6V","Base Product Number":"CY7C1338","Memory Organization":"128K x 32","Operating Temperature":"0°C~70°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/ab32017f2ce13bd2992e9ee01e59cd02.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the replacement for CY7C1338B-100AC?","answer":"Cypress has not assigned a direct replacement part number for the CY7C1338B-100AC in the same speed and package. Any pin-compatible alternative must match the 100-TQFP footprint, 8 ns access time, 100 MHz clock, and 3.3 V supply. A parametric search for 4 Mbit synchronous SRAMs in 100-TQFP with similar timing is the practical route, but each candidate requires full timing validation against the original design."},{"question":"What is the clock frequency of CY7C1338B-100AC?","answer":"The CY7C1338B-100AC operates at a 100 MHz clock frequency, with an 8 ns access time from clock edge to data valid."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7C1338B-100AC","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7C1338B-100AC 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}}