{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7C109B-12VC","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7C109B-12VC","canonicalUrl":"https://icboms.com/infineon/CY7C109B-12VC","factsUrl":"https://icboms.com/api/mcp/products/CY7C109B-12VC","rawCanonicalId":null},"summary":{"shortDescription":"Infineon CY7C109B-12VC, 1 Mbit asynchronous SRAM, 128K x 8 organization, 12 ns access time, parallel interface, 4.5 V to 5.5 V supply, 0°C to 70°C, 32-SOJ package.","salesMarkdown":"## 12 ns access time — timing closure for the bus The CY7C109B-12VC is a 1 Mbit asynchronous SRAM from Infineon (formerly Cypress), organized as 128K x 8 bits. Its 12 ns access time means the part can deliver data within 12 ns of an address change, which is fast enough for many mid-speed 8-bit or 16-bit bus systems without inserting wait states. The write cycle time matches the read at 12 ns, so back-to-back writes are equally tight. This part runs on a 5 V ±0.5 V supply rail — a legacy voltage that is becoming less common in newer designs but is still standard in many industrial controllers, telecom line cards, and test equipment that maintain a 5 V bus. The 32-SOJ package (32-BSOJ, 0.400\" body width) is a surface-mount, J-bend footprint that was common in the 1990s and 2000s for memory modules. Infineon lists the CY7C109B-12VC as obsolete.","metaTitle":"Infineon CY7C109B-12VC 1 Mbit Async SRAM, 12 ns, 32-SOJ","metaDescription":"Infineon CY7C109B-12VC 1 Mbit asynchronous SRAM, 12 ns access time, 128K x 8, 4.5V-5.5V, 0°C-70°C, 32-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":"12 ns","Memory Size":"1Mbit","Memory Type":"Volatile","Memory Format":"SRAM","Mounting Type":"Surface Mount","Package / Case":"32-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":"CY7C109","Memory Organization":"128K x 8","Operating Temperature":"0°C~70°C(TA)","Supplier Device Package":"32-SOJ","Write Cycle Time - Word, Page":"12ns"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/9348473d542f5020948178887c70842d.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the replacement for CY7C109B-12VC?","answer":"Infineon has not published an official direct replacement. For new designs, consider current-production 5 V async SRAMs in the same 32-SOJ footprint from ISSI, Alliance Memory, or Renesas — but verify pin compatibility against the respective datasheets."},{"question":"What is the access time of CY7C109B-12VC?","answer":"The access time is 12 ns for both read and write cycles."},{"question":"Can CY7C109B-12VC be used as replacement for CY7C109B-10VC?","answer":"The CY7C109B-12VC is a slower-speed variant (12 ns) of the same base part number. The CY7C109B-10VC has a 10 ns access time. If your system timing requires 10 ns, the 12 ns part will not meet the spec. Otherwise, they are pin-compatible and functionally identical."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7C109B-12VC","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7C109B-12VC 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}}