{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BR93G66FVM-3AGTTR","brand":"ROHM Semiconductor","brandSlug":"rohm","productSlug":"BR93G66FVM-3AGTTR","canonicalUrl":"https://icboms.com/rohm/BR93G66FVM-3AGTTR","factsUrl":"https://icboms.com/api/mcp/products/BR93G66FVM-3AGTTR","rawCanonicalId":null},"summary":{"shortDescription":"ROHM BR93G66FVM-3AGTTR, 4Kbit EEPROM, Non-Volatile, Microwire interface, 3 MHz clock, 1.7V–5.5V supply, 256 x 16 organization, 5ms write cycle, 8-MSOP package, -40°C to 85°C.","salesMarkdown":"## 4Kbit Microwire EEPROM in an 8-MSOP The ROHM BR93G66FVM-3AGTTR is a 4Kbit serial EEPROM using the Microwire interface, organized as 256 words by 16 bits. ## Supply range and bus timing The 1.7 V minimum supply is the key differentiator here — this EEPROM stays alive during a deep brown-out on a 3.3 V rail, and it can be powered directly from a 1.8 V MCU I/O bank. The 3 MHz clock is the Microwire bus speed; at 1.7 V the AC timing margins tighten, so keep the bus capacitance low and the trace short. The 5 ms write cycle time (word or page) sets the firmware polling interval — after a write command the host must wait at least 5 ms before addressing the part again. ROHM lists the BR93G66FVM-3AGTTR as Active. That means the part is still in regular production, no last-time-buy notice, no EOL clock ticking. For procurement, this is a clean line item — no single-source flag, no allocation risk from a phase-out. The part is ROHS3 compliant. ## Second-source and density options The closest drop-in sibling is the BR93G46FVM-3AGTTR — same package, same 3 MHz clock, same supply range, but 1Kbit organized as 64 x 16. If the BOM needs more storage, the BR93H86RF-WCE2 offers 16Kbit (1K x 16) but runs at 1.25 MHz and requires 2.7 V minimum, so it is not a pin-for-pin swap without a layout and firmware update. For an automotive-grade variant, the BR93A46RFVT-WME2 is AEC-Q100 qualified, 1Kbit, 2 MHz, 2.5 V min, and rated to 105°C.","metaTitle":"ROHM BR93G66FVM-3AGTTR EEPROM, 4Kbit, 3MHz, 8-MSOP","metaDescription":"ROHM BR93G66FVM-3AGTTR 4Kbit EEPROM, Microwire interface, 3 MHz clock, 1.7V–5.5V supply, -40°C to 85°C, 8-MSOP. Active lifecycle.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Technology":"EEPROM","Memory Size":"4Kbit","Memory Type":"Non-Volatile","Memory Format":"EEPROM","Mounting Type":"Surface Mount","Package / Case":"8-VSSOP, 8-MSOP (0.110\\\", 2.80mm Width)","Clock Frequency":"3 MHz","lifecycle_stage":"eol_hot","Memory Interface":"Microwire","Voltage - Supply":"1.7V ~ 5.5V","Memory Organization":"256 x 16","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"8-MSOP","Write Cycle Time - Word, Page":"5ms"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.54","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.54000","currency":"USD"},{"qty":10,"price":"$0.52800","currency":"USD"},{"qty":25,"price":"$0.49080","currency":"USD"},{"qty":50,"price":"$0.48800","currency":"USD"},{"qty":100,"price":"$0.43340","currency":"USD"},{"qty":250,"price":"$0.42784","currency":"USD"},{"qty":500,"price":"$0.42138","currency":"USD"},{"qty":1000,"price":"$0.41013","currency":"USD"},{"qty":3000,"price":"$0.38905","currency":"USD"},{"qty":6000,"price":"$0.36868","currency":"USD"},{"qty":15000,"price":"$0.36221","currency":"USD"},{"qty":30000,"price":"$0.35359","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/5781ac8ced92b467680d3a896654b684.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the write cycle time of BR93G66FVM-3AGTTR?","answer":"The write cycle time is 5 ms for both word and page writes. Firmware must hold off any bus access to this device for at least 5 ms after a write command."},{"question":"Is BR93G66FVM-3AGTTR compatible with 3.3V logic?","answer":"The Microwire interface is 3.3 V compatible without external level shifting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/rohm/BR93G66FVM-3AGTTR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/rohm/BR93G66FVM-3AGTTR 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}}