{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7C1021B-15VXC","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7C1021B-15VXC","canonicalUrl":"https://icboms.com/infineon/CY7C1021B-15VXC","factsUrl":"https://icboms.com/api/mcp/products/CY7C1021B-15VXC","rawCanonicalId":null},"summary":{"shortDescription":"Cypress CY7C1021B-15VXC asynchronous SRAM, 1 Mbit (64K x 16), 15 ns access time, parallel interface, 4.5 V to 5.5 V supply, 0°C to 70°C, 44-SOJ surface-mount package, Tube.","salesMarkdown":"The CY7C1021B-15VXC is a 1 Mbit asynchronous SRAM organized as 64K words by 16 bits, accessed through a parallel interface. The 44-SOJ package is surface-mount. ## 15 ns access time — bus timing margin for legacy controllers Access time is 15 ns. Write cycle time is 15 ns. ## Lifecycle reality — obsolete, not an active production part The CY7C1021B-15VXC is Obsolete. No manufacturer LTB window remains. ## Package and mounting — 44-SOJ surface-mount J-lead The 44-SOJ package has a body width of 10.16 mm (0.400 inch), J-lead formed on 1.27 mm pitch, and is surface-mount soldered. Unlike a TSOP with gull-wing leads, the J-lead tucks under the body, so the solder fillet is hidden — visual inspection requires an angled mirror or X-ray. The MSL (moisture sensitivity level) is not specified in the ledger, but for a 44-SOJ from this era it is typically MSL 3 (168-hour floor life); if the original packaging seal is broken, a 24-hour bake at 125°C before reflow is prudent. The SOJ footprint is compatible with standard SOIC-44 land patterns, but the J-lead standoff is lower — ensure the solder paste stencil aperture is sized for J-lead geometry, not gull-wing.","metaTitle":"CY7C1021B-15VXC SRAM, 1 Mbit 64Kx16, 15 ns, 44-SOJ","metaDescription":"Cypress CY7C1021B-15VXC asynchronous SRAM, 1 Mbit (64K x 16), 15 ns access, 4.5 V to 5.5 V, 0°C to 70°C, 44-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":"Tube","Technology":"SRAM - Asynchronous","Access Time":"15 ns","Memory Size":"1Mbit","Memory Type":"Volatile","Memory Format":"SRAM","Mounting Type":"Surface Mount","Package / Case":"44-BSOJ (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":"0°C~70°C(TA)","Supplier Device Package":"44-SOJ","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":"Is CY7C1021B-15VXC obsolete?","answer":"Yes, the CY7C1021B-15VXC is listed as Obsolete. Cypress (Infineon) no longer manufactures this part. There is no official replacement part number from the manufacturer. Availability is limited to surplus and broker inventory, which we can source and quote to order."},{"question":"What is the replacement for CY7C1021B-15VXC?","answer":"No official successor has been designated by Cypress/Infineon. For a 5 V, 1 Mbit asynchronous SRAM with 15 ns access in a 44-pin SOJ footprint, you would need to evaluate alternative manufacturers' offerings — such as the ISSI IS62WV1024BLL-15HLI (3.3 V) or the Alliance Memory AS7C34096A-15TIN (5 V, 44-TSOP) — but these change the package or supply voltage. A pin-compatible drop-in is not confirmed without checking the JEDEC standard pinout against your board."},{"question":"Where can I buy CY7C1021B-15VXC?","answer":"We source the CY7C1021B-15VXC through independent distribution channels — surplus and broker inventory. Submit an RFQ for current availability and pricing. Because the part is obsolete, confirmed stock and lead time are determined at quote time; we do not carry it on the shelf."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7C1021B-15VXC","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7C1021B-15VXC 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}}