{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7C1399B-15VXI","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7C1399B-15VXI","canonicalUrl":"https://icboms.com/infineon/CY7C1399B-15VXI","factsUrl":"https://icboms.com/api/mcp/products/CY7C1399B-15VXI","rawCanonicalId":null},"summary":{"shortDescription":"Cypress CY7C1399B-15VXI, 256Kbit asynchronous SRAM, 32K×8 organization, 15 ns access time, 3 V–3.6 V supply, 28-SOJ surface-mount, -40°C to 85°C.","salesMarkdown":"The CY7C1399B-15VXI is a 256Kbit asynchronous SRAM organized as 32K x 8 bits, with a 15 ns access time and a parallel memory interface. ## 15 ns access — what it buys on the bus A 15 ns access time means the SRAM can complete a read-to-data-valid cycle in 15 ns max. ## Obsolete — sourcing the CY7C1399B-15VXI today This part is officially obsolete per Cypress (now Infineon). No last-time-buy window remains open. No manufacturer-direct production is available. If you are freezing a new design, look at the active 28-SOJ asynchronous SRAM family from Cypress/Infineon or ISSI — but verify pinout and timing compatibility; the 32K x 8 organization and 15 ns speed grade are the constraints. ## Package and footprint — 28-SOJ The 28-SOJ package has a 0.300 inch body width, 7.62 mm.","metaTitle":"Cypress CY7C1399B-15VXI 256Kbit Async SRAM, 15 ns Access","metaDescription":"Cypress CY7C1399B-15VXI: 256Kbit asynchronous SRAM, 32K×8, 15 ns access, 3–3.6 V, 28-SOJ, -40°C to 85°C. Obsolete — sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Memory (DRAM / SRAM / Flash / EEPROM)"],"specifications":{"title":"CY7C1399B-15VXI","Package":"Tube","Technology":"SRAM - Asynchronous","Access Time":"15 ns","Memory Size":"256Kbit","Memory Type":"Volatile","Memory Format":"SRAM","Mounting Type":"Surface Mount","Package / Case":"28-BSOJ (0.300\\\", 7.62mm Width)","lifecycle_stage":"eol_hot","Memory Interface":"Parallel","Voltage - Supply":"3V ~ 3.6V","Base Product Number":"CY7C1399","Memory Organization":"32K x 8","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"28-SOJ","Write Cycle Time - Word, Page":"15ns"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6700","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/ece7e68f50620eb89e0b3d7eb36684f4.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/CY7C1399B-15VXI/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to CY7C1399B-15VXI?","answer":"There is no single official Cypress/Infineon pin-compatible replacement listed for this obsolete part. For a new design, evaluate active 32K x 8 asynchronous SRAMs in 28-SOJ from ISSI (e.g., IS61LV2568AL) or Alliance Memory, but verify supply voltage range (3 V–3.6 V) and 15 ns access time against your controller's timing budget."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7C1399B-15VXI","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7C1399B-15VXI 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}}