{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7C1021BN-15ZSXET","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7C1021BN-15ZSXET","canonicalUrl":"https://icboms.com/infineon/CY7C1021BN-15ZSXET","factsUrl":"https://icboms.com/api/mcp/products/CY7C1021BN-15ZSXET","rawCanonicalId":null},"summary":{"shortDescription":"Infineon CY7C1021BN-15ZSXET, 1Mbit (64K x 16) Asynchronous SRAM, 15 ns access time, 4.5V–5.5V supply, -40°C to 125°C, 44-TSOP II, Tape & Reel.","salesMarkdown":"The Infineon CY7C1021BN-15ZSXET is a 1Mbit asynchronous SRAM organized as 64K x 16 bits, a workhorse memory part for legacy industrial, telecom, and embedded systems that need fast, simple parallel memory without refresh overhead. Its 15 ns access time supports 16-bit microcontrollers and DSPs. For a 40 MHz bus (25 ns cycle), that leaves about 10 ns of margin for address decode, PCB trace delay, and setup time at the processor — tight but workable with careful layout. At 50 MHz (20 ns cycle) the margin shrinks to near zero, so verify timing closure in your specific system. Write cycle time is also 15 ns, so back-to-back writes can run at the same speed as reads — no penalty for mixed traffic. For an existing BOM that uses this exact SRAM, the path forward is either last-time-buy inventory from the factory (if still within the LTB window — check with your Infineon contact) or sourcing from the independent surplus and broker channel. We can quote current availability and pricing against an RFQ through our distribution network. If you are qualifying a replacement, the key parameters to match are the 64K x 16 organization, 15 ns access time, 4.5V–5.5V supply, and 44-TSOP II footprint. Several vendors (ISSI, Alliance Memory, Renesas) offer pin-compatible 1Mbit async SRAMs in the same package — but always verify the pinout and timing against your specific layout. ## Package and handling in the field The CY7C1021BN-15ZSXET comes in a 44-TSOP II (10.16 mm body width) surface-mount package, supplied in Tape & Reel.","metaTitle":"Infineon CY7C1021BN-15ZSXET 1Mbit Async SRAM, 15 ns","metaDescription":"Infineon CY7C1021BN-15ZSXET is a 1Mbit (64K x 16) asynchronous SRAM with 15 ns access time, 4.5V–5.5V supply, -40°C to 125°C range.","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":"$5.4700","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/b005a36e8e3c18743572ba4643b8046f.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/CY7C1021BN-15ZSXET/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy CY7C1021BN-15ZSXET?","answer":"Submit an RFQ through this listing; we will confirm current availability and pricing at quote time. No stock or price is shown here because the supply is quoted to order."},{"question":"Is CY7C1021BN-15ZSXET obsolete?","answer":"Yes, the part carries an Obsolete lifecycle status. Infineon has discontinued production, and no direct replacement has been announced."},{"question":"What is the replacement for CY7C1021BN-15ZSXET?","answer":"No official replacement is listed. For a pin-compatible alternative, look for 1Mbit (64K x 16) asynchronous SRAMs with 15 ns access time, 4.5V–5.5V supply, in a 44-TSOP II package from vendors like ISSI, Alliance Memory, or Renesas. Verify the pinout and timing against your design before committing."},{"question":"Is CY7C1021BN-15ZSXET compatible with 3.3V systems?","answer":"No. The supply range is 4.5V to 5.5V only. This part cannot be used on a 3.3V rail without level shifters on the address, data, and control lines."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7C1021BN-15ZSXET","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7C1021BN-15ZSXET 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}}