{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7C1399BL-12ZXC","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7C1399BL-12ZXC","canonicalUrl":"https://icboms.com/infineon/CY7C1399BL-12ZXC","factsUrl":"https://icboms.com/api/mcp/products/CY7C1399BL-12ZXC","rawCanonicalId":null},"summary":{"shortDescription":"Infineon (Cypress) CY7C1399BL-12ZXC, 256Kbit (32K x 8) Asynchronous SRAM, 12 ns Access Time, Parallel Interface, 3V to 3.6V Supply, 0°C to 70°C, 28-TSSOP, Tray.","salesMarkdown":"For existing BOM lines, procurement must go through independent distribution or surplus channels. ## 12 ns access time — bus timing margin for fast processors The 12 ns access time is the headline rating for this 256Kbit asynchronous SRAM. It defines how quickly data appears on the output after the address is presented. For a processor running at 50 MHz or faster, a 12 ns SRAM typically allows zero-wait-state reads when the bus timing budget is tight. This part is organized as 32K x 8, which suits 8-bit microcontroller buses or as a fast scratchpad for DSPs. ## 28-TSSOP footprint — verify PCB layout Packaged in a 28-TSSOP with a body width of 0.465\" (11.80 mm). If replacing a different SRAM in the same density, confirm the pinout and footprint match — Cypress used multiple 28-pin SRAM packages (TSOP I, TSOP II, SOIC) with different pin arrangements.","metaTitle":"CY7C1399BL-12ZXC SRAM, 256Kbit, 12 ns, 28-TSSOP, Obsolete","metaDescription":"Infineon (Cypress) CY7C1399BL-12ZXC asynchronous SRAM, 32K x 8, 12 ns access time, 3V-3.6V, 0°C to 70°C, 28-TSSOP.","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 - Asynchronous","Access Time":"12 ns","Memory Size":"256Kbit","Memory Type":"Volatile","Memory Format":"SRAM","Mounting Type":"Surface Mount","Package / Case":"28-TSSOP (0.465\\\", 11.80mm 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":"0°C ~ 70°C (TA)","Supplier Device Package":"28-TSOP I","Write Cycle Time - Word, Page":"12ns"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.3300","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/a01599d373db306f08880242de2c1d40.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/CY7C1399BL-12ZXC/alternatives.json"},"ai":{"faq":[{"question":"What is the access time of CY7C1399BL-12ZXC?","answer":"This is a fast asynchronous SRAM suitable for zero-wait-state operation with many 8-bit and 16-bit microcontrollers and DSPs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7C1399BL-12ZXC","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7C1399BL-12ZXC 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}}