{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7C1399BN-20ZXCT","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7C1399BN-20ZXCT","canonicalUrl":"https://icboms.com/infineon/CY7C1399BN-20ZXCT","factsUrl":"https://icboms.com/api/mcp/products/CY7C1399BN-20ZXCT","rawCanonicalId":null},"summary":{"shortDescription":"Infineon CY7C1399BN-20ZXCT, 256Kbit asynchronous SRAM, 32K x 8 organization, 20 ns access time, parallel interface, 3V–3.6V supply, 28-TSOP I package, 0°C–70°C commercial temperature range, Tape & Reel.","salesMarkdown":"The CY7C1399BN-20ZXCT: Sourcing now runs through independent distribution, where available inventory is quoted against an RFQ. ## 20 ns access time — bus timing margin The 20 ns access time is the key timing spec for this asynchronous SRAM. A host controller with a 25 ns or longer memory-cycle period can run this part with zero wait states; a faster bus may need to stretch the cycle or insert a wait state. The 20 ns figure is consistent with a 33 MHz to 40 MHz bus clock, assuming one-cycle access. ## 256Kbit density in 32K x 8 — buffer or scratchpad fit Organised as 32K words of 8 bits each, this 256Kbit SRAM serves as a small-footprint data buffer, parameter store, or working scratchpad in embedded systems. The parallel interface ties directly to an MCU or FPGA local bus without serialisation overhead. For designs that need a byte-wide memory window in the 0x0000–0x7FFF address range, the 32K x 8 layout maps cleanly. Rated supply range of 3V to 3.6V aligns with standard 3.3V logic families. ## Package — 28-TSOP I, surface mount Housed in a 28-TSOP I package, 11.80 mm body width, this is a standard thin small-outline package for memory devices. The surface-mount footprint suits automated assembly.","metaTitle":"CY7C1399BN-20ZXCT Infineon 256Kbit Async SRAM, 20 ns","metaDescription":"Infineon CY7C1399BN-20ZXCT 256Kbit async SRAM, 20 ns access, 32K x 8, 3V-3.6V, 28-TSOP I, 0°C-70°C. Obsolete.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Memory (DRAM / SRAM / Flash / EEPROM)"],"specifications":{"title":"CY7C1399BN-20ZXCT","Package":"Tape & Reel (TR)","Technology":"SRAM - Asynchronous","Access Time":"20 ns","Memory Size":"256Kbit","Memory Type":"Volatile","Memory Format":"SRAM","Mounting Type":"Surface Mount","Package / Case":"28-TSSOP (0.465\\\", 11.80mm Width)","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":"20ns"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/c257168b8bd736a4b27a5c7d87cabcfb.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the replacement for CY7C1399BN-20ZXCT?","answer":"For an active-design replacement, evaluate a current-production 256Kbit asynchronous SRAM in 28-TSOP I from Infineon or another vendor. The closest pin-compatible alternative within the same Cypress family would need to match the 32K x 8 organisation, 20 ns speed grade, and 3.3V supply — check the CY7C1399BN-20ZXI (industrial temperature) if temperature range is not a concern, but it too may be end-of-life."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7C1399BN-20ZXCT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7C1399BN-20ZXCT 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}}