{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"FM25640B-G","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"FM25640B-G","canonicalUrl":"https://icboms.com/infineon/FM25640B-G","factsUrl":"https://icboms.com/api/mcp/products/FM25640B-G","rawCanonicalId":null},"summary":{"shortDescription":"Infineon F-RAM™ series, FRAM (Ferroelectric RAM), 64Kbit, SPI, 20 MHz, 8-SOIC, Tube, 4.5V-5.5V, -40°C to 85°C.","salesMarkdown":"## Active FRAM with SPI bus — 64Kbit for non-volatile logging The FM25640B-G is an Infineon F-RAM™ device offering 64Kbit of non-volatile storage accessed through an SPI interface at up to 20 MHz. Organized as 8K x 8, it provides the instant-write endurance and low power of ferroelectric technology without the page-write delays or wear limits of EEPROM. ## Supply rail and temperature grade — 5V logic, industrial range Operates from 4.5V to 5.5V, making it a direct fit for legacy 5V SPI buses or mixed-voltage systems with a level translator on the host side. The -40°C to +85°C industrial temperature range covers factory-floor and outdoor equipment without derating. Housed in an 8-SOIC narrow-body package (3.90 mm width), the footprint matches standard SOIC-8 land patterns — no board spin required if replacing an EEPROM in the same package. ## Compliance and packaging — ROHS3, tube delivery ROHS3 compliant, with no substance restrictions under current EU directives. Supplied in tubes — the standard SOIC-8 tube format — suitable for hand-assembly or pick-and-place with tube feeders.","metaTitle":"Infineon FM25640B-G FRAM, 64Kbit SPI 20MHz 8-SOIC","metaDescription":"Infineon FM25640B-G F-RAM™, 64Kbit non-volatile memory, SPI interface, 20 MHz clock, 4.5-5.5V, 8-SOIC. Active production, ROHS3. Quoted to order.","metaKeywords":null},"attributes":{"series":"F-RAM™","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Memory (DRAM / SRAM / Flash / EEPROM)"],"specifications":{"Mfr":"Infineon Technologies","Series":"F-RAM™","Package":"Tube","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":"Active","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":"$4.6300","priceTiers":[{"qty":1,"price":"$4.63000","currency":"USD"},{"qty":10,"price":"$4.19700","currency":"USD"},{"qty":25,"price":"$4.10640","currency":"USD"},{"qty":50,"price":"$4.08400","currency":"USD"},{"qty":100,"price":"$3.66190","currency":"USD"},{"qty":250,"price":"$3.64852","currency":"USD"},{"qty":500,"price":"$3.51520","currency":"USD"},{"qty":1000,"price":"$3.34189","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/e1320cd27a800b168bd2ba2bbd5e3dd1.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/FM25640B-G/alternatives.json"},"ai":{"faq":[{"question":"Is FM25640B-G a drop-in replacement for FM25040B-G?","answer":"Both parts share the same 8-SOIC package, SPI interface, and 4.5-5.5V supply range. The FM25640B-G offers 64Kbit versus 4Kbit — 16× the density. Electrically compatible on the same bus, but the larger memory may require firmware changes if the host expects the smaller device's address range."},{"question":"What is the FM25640B-G used for?","answer":"As a serial FRAM, it stores configuration parameters, calibration data, or event logs that must survive power loss and tolerate frequent writes — data-logging in industrial sensors, metering, and embedded control panels where EEPROM write endurance would be a constraint."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/FM25640B-G","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/FM25640B-G when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}