{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7C1021B-15ZXET","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7C1021B-15ZXET","canonicalUrl":"https://icboms.com/infineon/CY7C1021B-15ZXET","factsUrl":"https://icboms.com/api/mcp/products/CY7C1021B-15ZXET","rawCanonicalId":null},"summary":{"shortDescription":"Infineon Technologies CY7C1021B-15ZXET, asynchronous SRAM, 1Mbit (64K x 16), 15 ns access, 4.5 V – 5.5 V, -40°C to +125°C, 44-TSOP II, Tape & Reel.","salesMarkdown":"The CY7C1021B-15ZXET: The 44-TSOP II package (0.400-inch body, 10.16 mm width) is surface-mount, so no socket; you need a hot-air station or a reflow profile to swap it on site. The -40°C to +125°C operating range qualifies it for industrial and automotive-adjacent environments where the board sees thermal cycling — engine bay, outdoor telecom, or a hot enclosure. At 125°C junction, the standby current creeps up, but the 15 ns access holds across the band. ## Obsolete — sourcing reality for the BOM line Infineon lists this part as Obsolete. That means the only supply channel is independent surplus and broker inventory — no factory orders, no last-time-buy window. If this is on your BOM, the procurement move is to secure a lot against the remaining build run or qualify a replacement. ## Package and board-fit — what the 44-TSOP II demands The 44-TSOP II footprint is a standard JEDEC outline — 0.400-inch body width, 10.16 mm, with leads on 0.80 mm pitch. The supplier device package is the thin small-outline version (TSOP II), which sits lower than a standard TSOP and has a narrower body. The Tape & Reel delivery means it comes on a 13-inch reel for automated pick-and-place; the reel quantity is not stated, but typical for this package is around 1000 pieces per reel. The 15 ns access time means the address-to-data valid window is tight; trace length matching on the 16-bit data bus matters if the board runs at the rated speed.","metaTitle":"CY7C1021B-15ZXET Infineon 1Mbit Async SRAM, 15ns, 44-TSOP","metaDescription":"CY7C1021B-15ZXET Infineon 1Mbit asynchronous SRAM, 15ns access, 4.5V-5.5V, -40°C to +125°C. Obsolete — sourced to order through independent distribution.","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":"1Mbit","Memory Type":"Volatile","Memory Format":"SRAM","Mounting Type":"Surface Mount","Package / Case":"44-TSOP (0.400\\\", 10.16mm Width)","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Memory Interface":"Parallel","Voltage - Supply":"4.5V ~ 5.5V","Base Product Number":"CY7C1021","Memory Organization":"64K x 16","Operating Temperature":"-40°C~125°C(TA)","Supplier Device Package":"44-TSOP II","Write Cycle Time - Word, Page":"15ns"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/0fb2bf1fb1bf1eaa7b1a14798a1f21cb.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Who supplies CY7C1021B-15ZXET and how is it quoted for volume purchases?","answer":"We source it through independent distribution and surplus channels."},{"question":"What is the closest pin-compatible alternative to CY7C1021B-15ZXET in this SRAM family?","answer":"For a drop-in replacement, you would need to cross-reference against other 64K x 16 asynchronous SRAMs in a 44-TSOP II package with a 15 ns access time and 5 V supply — but no single part is confirmed as a direct second source."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7C1021B-15ZXET","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7C1021B-15ZXET when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T01:54:33.833Z","lastPublished":"2026-07-21T01:54:33.833Z","indexable":true}}