{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"FM25640B-G2TR","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"FM25640B-G2TR","canonicalUrl":"https://icboms.com/infineon/FM25640B-G2TR","factsUrl":"https://icboms.com/api/mcp/products/FM25640B-G2TR","rawCanonicalId":null},"summary":{"shortDescription":"Infineon F-RAM™ series, FRAM (Ferroelectric RAM), 64Kbit, SPI, 20 MHz, 4.5V~5.5V, -40°C~85°C, 8-SOIC (0.154\", 3.90mm Width), Surface Mount, Tape & Reel.","salesMarkdown":"The FM25640B-G2TR is a 64Kbit ferroelectric RAM organized as 8K x 8 bits, accessed over an SPI bus running up to 20 MHz. The FRAM cell writes without a page-erase cycle — each byte is written at bus speed, so the effective write throughput is limited by the SPI clock, not by the memory's internal timing. For a data logger logging 64-byte packets at 20 MHz, the write completes in roughly 30 µs, compared to several milliseconds for a serial EEPROM of the same density. ## Obsolete — sourcing through surplus and broker channels A pin-compatible alternative from the same family is not listed; any replacement would require a board spin or a parametric search across the 8-SOIC SPI FRAM class. Surface-mount in an 8-SOIC package (3.90 mm body width, 0.154\" pitch). The footprint matches industry-standard SOIC-8 land patterns used by serial memories and EEPROMs. No exposed pad — standard reflow profile for lead-free solder applies.","metaTitle":"Infineon FM25640B-G2TR 64Kbit FRAM, SPI, 8-SOIC","metaDescription":"Infineon FM25640B-G2TR 64Kbit FRAM, SPI 20 MHz, 4.5-5.5V, -40°C to 85°C, 8-SOIC. Obsolete — sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Memory (DRAM / SRAM / Flash / EEPROM)"],"specifications":{"Mfr":"Infineon Technologies","Series":"F-RAM™","Package":"Tape & Reel (TR)","Technology":"FRAM (Ferroelectric RAM)","Memory Size":"64Kbit","Memory Type":"Non-Volatile","Memory Format":"FRAM","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","Product Status":"Obsolete","Clock Frequency":"20 MHz","lifecycle_stage":"eol_hot","Memory Interface":"SPI","Voltage - Supply":"4.5V ~ 5.5V","Base Product Number":"FM25640","Memory Organization":"8K x 8","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"8-SOIC","Write Cycle Time - Word, Page":"-"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/e1320cd27a800b168bd2ba2bbd5e3dd1.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What replaces FM25640B-G2TR?","answer":"No official successor or cross-reference is listed in this record. A pin-compatible SPI F-RAM at the same density tier from the Cypress/Infineon family is the design path — confirm firmware compatibility before substituting."},{"question":"Where can I buy FM25640B-G2TR and what is the lead time?","answer":"Sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time; the part ships as available from broker and excess-stock channels rather than new production."},{"question":"What is FM25640B-G2TR's memory technology and interface?","answer":"It is a ferroelectric non-volatile memory (F-RAM) with a SPI interface, organized as 8K×8 bits at up to 20 MHz clock — a different technology class than EEPROM, with orders-of-magnitude higher write endurance and no erase cycle required before write."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/FM25640B-G2TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/FM25640B-G2TR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:20:40.986Z","lastPublished":"2026-07-21T02:20:40.986Z","indexable":true}}