{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7C199D-25SXE","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7C199D-25SXE","canonicalUrl":"https://icboms.com/infineon/CY7C199D-25SXE","factsUrl":"https://icboms.com/api/mcp/products/CY7C199D-25SXE","rawCanonicalId":null},"summary":{"shortDescription":"Infineon Technologies CY7C199D-25SXE, 256Kbit (32K x 8) asynchronous SRAM, 25 ns access time, parallel interface, 4.5V–5.5V supply, -40°C to 125°C, 28-SOIC wide-body (0.295\", 7.50mm width), Tube.","salesMarkdown":"## 256Kbit asynchronous SRAM in 28-SOIC wide — 25 ns access The CY7C199D-25SXE is a 256Kbit asynchronous SRAM organised as 32K x 8, with a 25 ns access time and a 4.5V to 5.5V supply rail. The wide 28-SOIC (7.50 mm body width) footprint is the same as the industry-standard 28-pin SOIC used by many legacy 32K x 8 SRAMs, so it can drop onto an existing board layout that was routed for a 5 V asynchronous SRAM. That 125°C ceiling is the junction temperature limit — the part can sit next to a hot processor without needing an air duct. Infineon lists the CY7C199D-25SXE as Obsolete. The 28-SOIC wide package is still widely stocked across surplus channels, but the available pool shrinks as time passes. ## Design-in note: 5 V supply and 25 ns timing The 4.5V–5.5V supply range means this SRAM is a 5 V nominal device. The 25 ns access time is specified from address valid to data valid; a 40 MHz bus with one wait state has a 50 ns cycle, which leaves 25 ns margin after the SRAM access — comfortable for most 8-bit microcontrollers but tight for a 16-bit bus with an external memory controller.","metaTitle":"CY7C199D-25SXE 256Kbit SRAM 25 ns Obsolete – Sourcing via","metaDescription":"Infineon CY7C199D-25SXE 256Kbit asynchronous SRAM, 32K x 8, 25 ns access, -40°C to 125°C, 28-SOIC wide.","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":"Tube","Technology":"SRAM - Asynchronous","Access Time":"25 ns","Memory Size":"256Kbit","Memory Type":"Volatile","Memory Format":"SRAM","Mounting Type":"Surface Mount","Package / Case":"28-SOIC (0.295\\\", 7.50mm Width)","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Memory Interface":"Parallel","Voltage - Supply":"4.5V ~ 5.5V","Base Product Number":"CY7C199","Memory Organization":"32K x 8","Operating Temperature":"-40°C ~ 125°C (TA)","Supplier Device Package":"28-SOIC","Write Cycle Time - Word, Page":"25ns"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/0f32eb2cec733b3c06d4d41c03f7955f.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How can I order the CY7C199D-25SXE or get a quote?","answer":"The CY7C199D-25SXE is obsolete and not in production. We source it through independent supply channels against your BOM quantity. Submit an RFQ with the target quantity and required delivery window — we confirm availability and pricing at quote time. No stock-holding claim is made on this page."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7C199D-25SXE","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7C199D-25SXE 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}}