{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY7C1265V18-400BZXC","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY7C1265V18-400BZXC","canonicalUrl":"https://icboms.com/infineon/CY7C1265V18-400BZXC","factsUrl":"https://icboms.com/api/mcp/products/CY7C1265V18-400BZXC","rawCanonicalId":null},"summary":{"shortDescription":"Cypress CY7C1265V18-400BZXC, QDR II synchronous SRAM, 36Mbit (1M x 36), 400 MHz clock, parallel interface, 1.7V–1.9V supply, 0°C–70°C, 165-FBGA (15x17 mm), Tray.","salesMarkdown":"## 36Mbit QDR II SRAM at 400 MHz — what it does It clocks at 400 MHz on the read and write ports, giving back-to-back bus transactions without dead cycles — the key advantage of QDR II over standard synchronous SRAM. The parallel interface and 1.7V to 1.9V core supply target high-throughput data buffers in network switches, test instrumentation, and baseband processing where every clock cycle carries a valid word. At 400 MHz the QDR II interface delivers a peak bandwidth of 1.6 Gbps per I/O pin (double-data-rate on both read and write ports). That throughput is what makes this part a fit for designs that cannot stall the pipeline — think packet buffers in 10 GbE line cards or real-time radar processing. The trade-off is tighter timing closure on the PCB: the 400 MHz clock demands controlled-impedance traces and matched-length routing between the SRAM and the controller. The 165-ball FBGA (15x17 mm) footprint gives enough signal layers to route the full 36-bit data bus plus address and control without excessive via stubs. The CY7C1265V18-400BZXC carries an official Obsolete lifecycle status. Cypress (now part of Infineon) no longer manufactures this density-speed-grade combination. If you are designing a new board, look at current-generation QDR II+ or QDR IV SRAMs from Cypress/Infineon or Renesas that maintain the 1.7V–1.9V supply and 165-ball FBGA footprint, but verify pin compatibility — the QDR II family has multiple ballout revisions.","metaTitle":"CY7C1265V18-400BZXC QDR II SRAM, 36Mbit, 400 MHz, Obsolete","metaDescription":"Cypress CY7C1265V18-400BZXC is a 36Mbit QDR II synchronous SRAM with 400 MHz clock, 1.7V–1.9V supply, 165-FBGA.","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, QDR II","Memory Size":"36Mbit","Memory Type":"Volatile","Memory Format":"SRAM","Mounting Type":"Surface Mount","Package / Case":"165-LBGA","Product Status":"Obsolete","Clock Frequency":"400 MHz","lifecycle_stage":"eol_hot","Memory Interface":"Parallel","Voltage - Supply":"1.7V ~ 1.9V","Base Product Number":"CY7C1265","Memory Organization":"1M x 36","Operating Temperature":"0°C ~ 70°C (TA)","Supplier Device Package":"165-FBGA (15x17)","Write Cycle Time - Word, Page":"-"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/0ebd4ce34fea997a966446ce63110662.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is CY7C1265V18-400BZXC obsolete?","answer":"Yes, the CY7C1265V18-400BZXC is officially obsolete. Cypress/Infineon no longer produces this part."},{"question":"What is the replacement for CY7C1265V18-400BZXC?","answer":"No direct replacement is listed in the official records. The base product number CY7C1265 covers other speed and temperature variants, but the 400 MHz commercial-grade BZXC suffix is the specific obsolete configuration. For new designs, consider current QDR II+ or QDR IV SRAMs from Cypress/Infineon or Renesas with similar supply voltage and package, but verify ballout compatibility."},{"question":"What is CY7C1265V18-400BZXC's listed technology?","answer":"It is a synchronous SRAM using the QDR II (Quad Data Rate II) architecture, organized as 1M x 36 bits for a total of 36Mbit. It is volatile memory with a parallel interface."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY7C1265V18-400BZXC","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY7C1265V18-400BZXC 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}}