{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"93LC66B/P","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"93LC66B-P","canonicalUrl":"https://icboms.com/microchip/93LC66B-P","factsUrl":"https://icboms.com/api/mcp/products/93LC66B%2FP","rawCanonicalId":null},"summary":{"shortDescription":"Microchip 93LC66B/P, 4Kbit serial EEPROM, Microwire interface, 2 MHz clock, 2.5V–5.5V supply, 256 x 16 organization, 8-DIP through-hole package, 0°C to 70°C operating temperature.","salesMarkdown":"The Microchip 93LC66B/P is a 4 Kbit serial EEPROM organized as 256 x 16 bits, accessed through a Microwire interface at clock rates up to 2 MHz. ## 2 MHz Microwire — what the clock speed means for your bus The 2 MHz clock rate is the Microwire bus speed. Each read or write cycle shifts data serially at up to 2 MHz. It is not suited for automotive under-hood, outdoor telecom cabinets, or unheated storage where temperatures drop below freezing. If your application sees -40°C or +85°C, look at the industrial-temperature sibling 93C66B-I/P, which shares the same 4 Kbit density and DIP footprint but extends the range.","metaTitle":"Microchip 93LC66B/P 4Kbit Microwire EEPROM, 2 MHz, 8-DIP","metaDescription":"Microchip 93LC66B/P 4Kbit EEPROM, Microwire interface, 2 MHz clock, 2.5V–5.5V supply, 8-DIP through-hole package. Active lifecycle, ROHS3.","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":"4Kbit","Memory Type":"Non-Volatile","Memory Format":"EEPROM","Mounting Type":"Through Hole","Package / Case":"8-DIP (0.300\\\", 7.62mm)","Clock Frequency":"2 MHz","lifecycle_stage":"eol_hot","Memory Interface":"Microwire","Voltage - Supply":"2.5V ~ 5.5V","Memory Organization":"256 x 16","Operating Temperature":"0°C ~ 70°C (TA)","Supplier Device Package":"8-PDIP","Write Cycle Time - Word, Page":"6ms"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.46","priceTiers":[{"qty":1,"price":"$0.46000","currency":"USD"},{"qty":25,"price":"$0.43480","currency":"USD"},{"qty":100,"price":"$0.42400","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/166b1e973ae972dafd128a2ddead82b6.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/93LC66B%2FP/alternatives.json"},"ai":{"faq":[{"question":"What is the equivalent of 93LC66B/P?","answer":"For a surface-mount alternative, the 93AA66B-I/MS runs from 1.8 V in an 8-MSOP package."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/93LC66B-P","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/93LC66B-P when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T14:34:45.345Z","lastPublished":"2026-07-20T14:34:45.345Z","indexable":true}}