{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"11LC040-I/SN","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"11LC040-I-SN","canonicalUrl":"https://icboms.com/microchip/11LC040-I-SN","factsUrl":"https://icboms.com/api/mcp/products/11LC040-I%2FSN","rawCanonicalId":null},"summary":{"shortDescription":"Microchip 11LC040-I/SN, 4Kbit serial EEPROM, single-wire interface, 512 x 8 organization, 100 kHz clock, 2.5V to 5.5V supply, -40°C to 85°C, 8-SOIC package, Tube.","salesMarkdown":"## Single-wire EEPROM for GPIO-constrained designs The Microchip 11LC040-I/SN is a 4Kbit serial EEPROM that communicates over a single-wire interface — data and clock share one pin. That frees up GPIO on small-package MCUs or when every I/O line is already allocated. Organized as 512 x 8 bits, it stores calibration tables, device configuration, or serial numbers without tying up an I²C or SPI bus. The 100 kHz clock rate is typical for single-wire parts — fine for infrequent reads and writes of small data blocks. Microchip lists the 11LC040-I/SN as Active. ROHS3 compliant, so it passes into EU and RoHS-regulated markets without exemption paperwork. ## Surface-mount 8-SOIC, tube delivery Packaged in an 8-pin SOIC (3.90 mm body width) for surface-mount assembly. Shipped in tube form — factor that into your pick-and-place feeder setup if your line expects tape-and-reel for this footprint.","metaTitle":"Microchip 11LC040-I/SN EEPROM, 4Kbit Single-Wire, 8-SOIC","metaDescription":"Microchip 11LC040-I/SN 4Kbit serial EEPROM with single-wire interface, 2.5V-5.5V supply, -40°C to 85°C range. Active, RoHS3 compliant.","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":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","Clock Frequency":"100 kHz","lifecycle_stage":"eol_hot","Memory Interface":"Single Wire","Voltage - Supply":"2.5V ~ 5.5V","Memory Organization":"512 x 8","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"8-SOIC","Write Cycle Time - Word, Page":"5ms"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.32","priceTiers":[{"qty":1,"price":"$0.32000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/7e0bb80ac6f9ae234873f64c6baf4f4d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/11LC040-I%2FSN/alternatives.json"},"ai":{"faq":[{"question":"What interface protocol does 11LC040-I/SN use?","answer":"It uses a single-wire interface — data and clock are combined on one pin, unlike I²C or SPI which need two or more signal lines."},{"question":"Is 11LC040-I/SN RoHS compliant?","answer":"Yes, it is ROHS3 compliant per Microchip's lifecycle data."},{"question":"What is the memory size and organization of 11LC040-I/SN?","answer":"4Kbit total, organized as 512 x 8 bits."},{"question":"When sourcing 11LC040-I/SN, what's the closest functional second-source?","answer":"The AT24C04C-XHM-B is a 4Kbit I²C EEPROM with similar supply range and temperature grade, but it uses a two-wire I²C interface rather than single-wire — the bus protocol differs, so a firmware change is required."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/11LC040-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/11LC040-I-SN when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T14:34:45.345Z","lastPublished":"2026-07-20T14:34:45.345Z","indexable":true}}