{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"25AA640A-I/P","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"25AA640A-I-P","canonicalUrl":"https://icboms.com/microchip/25AA640A-I-P","factsUrl":"https://icboms.com/api/mcp/products/25AA640A-I%2FP","rawCanonicalId":null},"summary":{"shortDescription":"Microchip 25AA640A-I/P, 64Kbit SPI EEPROM, 10 MHz clock, 1.8V-5.5V supply, 8K x 8 organization, through-hole 8-PDIP, -40°C to 85°C.","salesMarkdown":"## 64 Kbit SPI EEPROM in a through-hole DIP — what you get It clocks up to 10 MHz and operates from 1.8V to 5.5V, making it usable across 3.3V and 5V logic domains without a level shifter. The 8-PDIP package suits through-hole prototyping, legacy board repairs, or designs where socketed firmware storage is preferred. ## 10 MHz SPI — bus timing headroom The 10 MHz SPI clock lets the host controller read or write the full 64 Kbit array in under 7 ms at maximum speed. For comparison, the older 25LC640-I/P sibling tops out at 2 MHz — the 25AA640A-I/P gives five times the throughput for firmware updates or high-speed parameter logging. The write cycle time per page is 5 ms, so burst writes still need a polling or interrupt-driven wait loop. The wide supply range covers 1.8V low-power MCUs, 3.3V mainstream controllers, and legacy 5V buses. No external regulator is needed when the EEPROM shares a rail with the host. At 1.8V the SPI clock still hits 10 MHz, which is rare for a serial EEPROM — most 1.8V parts derate to 5 MHz or less. This part keeps the full speed across the entire voltage range. Microchip has not issued an EOL notice or last-time-buy window for this order code.","metaTitle":"Microchip 25AA640A-I/P 64Kbit SPI EEPROM, 10 MHz, 8-PDIP","metaDescription":"Microchip 25AA640A-I/P 64Kbit SPI EEPROM, 10 MHz clock, 1.8V-5.5V supply, 8-PDIP. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Memory (DRAM / SRAM / Flash / EEPROM)"],"specifications":{"Package":"Tube","Technology":"EEPROM","Memory Size":"64Kbit","Memory Type":"Non-Volatile","Memory Format":"EEPROM","Mounting Type":"Through Hole","Package / Case":"8-DIP (0.300\\\", 7.62mm)","Clock Frequency":"10 MHz","lifecycle_stage":"eol_hot","Memory Interface":"SPI","Voltage - Supply":"1.8V ~ 5.5V","Memory Organization":"8K x 8","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"8-PDIP","Write Cycle Time - Word, Page":"5ms"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.88","priceTiers":[{"qty":1,"price":"$0.88000","currency":"USD"},{"qty":25,"price":"$0.84800","currency":"USD"},{"qty":100,"price":"$0.82500","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/572e74a017e1a7aeb4cb98ccabccdbce.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/25AA640A-I%2FP/alternatives.json"},"ai":{"faq":[{"question":"What is the maximum clock frequency of 25AA640A-I/P?","answer":"The SPI clock runs at 10 MHz maximum across the full 1.8V to 5.5V supply range. This is faster than the 2 MHz limit on the 25LC640-I/P peer."},{"question":"Does 25AA640A-I/P operate at 1.8V?","answer":"Yes, the supply range is 1.8V to 5.5V. At 1.8V the part still supports the full 10 MHz SPI clock."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/25AA640A-I-P","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/25AA640A-I-P 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}}