{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7C12681KV18-450BZXC","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7C12681KV18-450BZXC","canonicalUrl":"https://icboms.com/infineon/CY7C12681KV18-450BZXC","factsUrl":"https://icboms.com/api/mcp/products/CY7C12681KV18-450BZXC","rawCanonicalId":null},"summary":{"shortDescription":"Cypress CY7C12681KV18-450BZXC, 36Mbit Synchronous DDR II+ SRAM, 450 MHz clock, 2M x 18 organization, 1.7V-1.9V supply, 165-FBGA (13x15), 0°C to 70°C.","salesMarkdown":"## 36Mbit DDR II+ SRAM at 450 MHz — what it does in the system The Cypress CY7C12681KV18-450BZXC is a 36Mbit synchronous SRAM using a DDR II+ (Double Data Rate II+) interface, organized as 2M x 18. It operates at a 450 MHz clock frequency, delivering back-to-back read/write throughput without dead cycles — a key requirement for high-bandwidth buffer applications in networking line cards, telecom switches, and test equipment where the memory bus must keep pace with fast packet processors or FPGAs. The part uses a parallel memory interface and requires a 1.7V to 1.9V supply rail, typical for the DDR II+ generation. ## 450 MHz clock — timing margin and bus design At 450 MHz the data window is roughly 2.2 ns for a single-edge cycle, and the DDR II+ interface transfers data on both clock edges, so the effective data rate is 900 MT/s per pin. The 165-FBGA package (13x15 mm) keeps signal inductance low, but the board designer must match trace lengths within a few hundred mils and use controlled impedance to maintain setup/hold margins. ## Package and mounting — 165-FBGA considerations Surface-mount assembly requires a BGA reflow profile with proper stencil design for the 1.0 mm ball pitch typical of this package. The package is not compatible with hand-soldering or hot-air rework without a dedicated BGA rework station.","metaTitle":"Cypress CY7C12681KV18-450BZXC 36Mbit DDR II+ SRAM, 450 MHz","metaDescription":"Cypress CY7C12681KV18-450BZXC 36Mbit synchronous DDR II+ SRAM, 450 MHz clock, 165-FBGA, 1.7V-1.9V supply.","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":"Tray","Technology":"SRAM - Synchronous, DDR II+","Memory Size":"36Mbit","Memory Type":"Volatile","Memory Format":"SRAM","Mounting Type":"Surface Mount","Package / Case":"165-LBGA","Product Status":"Obsolete","Clock Frequency":"450 MHz","lifecycle_stage":"eol_hot","Memory Interface":"Parallel","Voltage - Supply":"1.7V ~ 1.9V","Base Product Number":"CY7C12681","Memory Organization":"2M x 18","Operating Temperature":"0°C~70°C(TA)","Supplier Device Package":"165-FBGA (13x15)","Write Cycle Time - Word, Page":"-"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$60.2600","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/36020056f9df0e5f660738fd69b338c6.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/CY7C12681KV18-450BZXC/alternatives.json"},"ai":{"faq":[{"question":"Is the CY7C12681KV18-450BZXC obsolete?","answer":"Yes, the CY7C12681KV18-450BZXC carries an Obsolete lifecycle status. Cypress (Infineon) no longer produces this part in active manufacturing. Procurement must rely on surplus or broker channels for this exact order code."},{"question":"What is a replacement for CY7C12681KV18-450BZXC?","answer":"A replacement would require a pin-compatible and function-compatible DDR II+ SRAM with the same 36Mbit density, 450 MHz clock, 2M x 18 organization, and 165-FBGA footprint. Any candidate must be validated against the original PCB layout and timing budget before BOM substitution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7C12681KV18-450BZXC","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7C12681KV18-450BZXC 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}}