{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7C1399BN-15VXIT","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7C1399BN-15VXIT","canonicalUrl":"https://icboms.com/infineon/CY7C1399BN-15VXIT","factsUrl":"https://icboms.com/api/mcp/products/CY7C1399BN-15VXIT","rawCanonicalId":null},"summary":{"shortDescription":"Infineon CY7C1399BN-15VXIT, 256Kbit asynchronous SRAM, 32K x 8 organization, 15 ns access time, 3V–3.6V supply, -40°C to 85°C, 28-SOJ surface-mount package, Tape & Reel.","salesMarkdown":"## 15 ns asynchronous SRAM for legacy bus timing The Infineon CY7C1399BN-15VXIT is a 256Kbit asynchronous SRAM organized as 32K x 8, with a 15 ns access time that sets the bus-cycle window for the host controller. This speed grade suits processors and ASICs with read-cycle requirements in the 15 ns to 20 ns range — common in industrial control boards, telecom line cards, and test equipment from the late-1990s through mid-2000s design cycles. ## Industrial temperature grade and deployment context The 28-SOJ package (JEDEC MO-061, 300-mil body width) is a surface-mount outline that was widely used in high-density memory arrays on multi-layer FR4 boards. Reflow profiles follow standard J-STD-020 for MSL 3 devices; the SOJ lead form is less tolerant of board flex than a TSOP, so mechanical stress around the solder joints should be reviewed during PCB layout. Infineon (formerly Cypress Semiconductor) has discontinued this part; no last-time-buy window remains open through the factory. Sourcing is limited to independent distribution and surplus inventory channels. Buyers should verify date code freshness and request counterfeit-screening documentation for any lot offered.","metaTitle":"Infineon CY7C1399BN-15VXIT 256Kbit Async SRAM, 15 ns","metaDescription":"Infineon CY7C1399BN-15VXIT 256Kbit asynchronous SRAM, 32K x 8, 15 ns access time, 3V–3.6V, -40°C to 85°C, 28-SOJ.","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":"Tape & Reel (TR)","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)","Product Status":"Obsolete","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":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/69ff54d69906280bfa12bf5ffcc96488.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy CY7C1399BN-15VXIT?","answer":"This obsolete SRAM is sourced through independent distribution. Submit an RFQ for current availability and pricing; each order is quoted individually and confirmed at quote time."},{"question":"Is CY7C1399BN-15VXIT obsolete?","answer":"Yes, the lifecycle status is Obsolete. Infineon has discontinued production; no factory last-time-buy is available."},{"question":"What is the access time of CY7C1399BN-15VXIT?","answer":"The access time is 15 ns, which defines the read-cycle window for the host bus."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7C1399BN-15VXIT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7C1399BN-15VXIT 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}}