{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"93AA66C-I/SN","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"93AA66C-I-SN","canonicalUrl":"https://icboms.com/microchip/93AA66C-I-SN","factsUrl":"https://icboms.com/api/mcp/products/93AA66C-I%2FSN","rawCanonicalId":null},"summary":{"shortDescription":"Microchip 93AA66C-I/SN, 4Kbit serial EEPROM, Microwire interface, 3 MHz clock, 1.8-5.5V supply, 512 x 8 / 256 x 16 organization, -40 to 85°C, 8-SOIC, Tube.","salesMarkdown":"## 4 Kbit Microwire EEPROM in SOIC-8 — BOM fit at a glance The Microchip 93AA66C-I/SN is a 4 Kbit serial EEPROM using the Microwire interface, organized as 512 x 8 or 256 x 16 bits. The 3 MHz clock rate is the key differentiator from the 93AA66B variant, which runs at 2 MHz. For a host controller that supports Microwire at 3 MHz, this part reduces the read/write cycle time by a third, which matters if the EEPROM is polled frequently during calibration or configuration load.","metaTitle":"Microchip 93AA66C-I/SN 4Kbit Microwire EEPROM, 3 MHz, SOIC-8","metaDescription":"Microchip 93AA66C-I/SN 4Kbit serial EEPROM, Microwire interface, 3 MHz clock, 1.8-5.5V supply, -40 to 85°C, SOIC-8. Active, RoHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Package":"Tube","Technology":"EEPROM","Memory Size":"4Kbit","Memory Type":"Non-Volatile","Memory Format":"EEPROM","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","Clock Frequency":"3 MHz","lifecycle_stage":"eol_hot","Memory Interface":"Microwire","Voltage - Supply":"1.8V ~ 5.5V","Memory Organization":"512 x 8, 256 x 16","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"8-SOIC","Write Cycle Time - Word, Page":"6ms"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.35","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.35000","currency":"USD"},{"qty":25,"price":"$0.34000","currency":"USD"},{"qty":100,"price":"$0.33000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/166b1e973ae972dafd128a2ddead82b6.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How do I get current pricing and availability for 93AA66C-I/SN?","answer":"Submit an RFQ for this order code and we will return a firm price and lead time based on current distributor inventory and factory allocation."},{"question":"What is the difference between 93AA66C and 93AA66B?","answer":"The 93AA66C-I/SN runs at 3 MHz clock frequency, while the 93AA66B-I/MS is limited to 2 MHz. Both are 4 Kbit Microwire EEPROMs in the same 8-pin SOIC footprint, with identical supply range and temperature grade. The C variant is the faster option for designs that can use the extra bus speed."},{"question":"Is 93AA66C-I/SN RoHS compliant?","answer":"Yes, it is ROHS3 Compliant. No exemptions or lead-bearing finishes are listed for this part number."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/93AA66C-I-SN","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/93AA66C-I-SN 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}}