{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"24LC128T-I/SN","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"24LC128T-I-SN","canonicalUrl":"https://icboms.com/microchip/24LC128T-I-SN","factsUrl":"https://icboms.com/api/mcp/products/24LC128T-I%2FSN","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology 24LC128T-I/SN EEPROM, 128Kbit, I²C, 900 ns access, 2.5-5.5V, -40 to +85°C, 8-SOIC, Tape & Reel.","salesMarkdown":"## 128Kbit I²C EEPROM in 8-SOIC — active production, industrial temp The Microchip Technology 24LC128T-I/SN is a 128Kbit serial EEPROM organized as 16K x 8 bits, accessed through an I²C interface at clock frequencies up to 400 kHz. ## Second-source fit — 24AA128T-I/SN drop-in with voltage caveat The 24AA128T-I/SN is pin-compatible and functionally identical — same 128Kbit density, same I²C interface, same 8-SOIC package, same 900 ns access time and 5 ms write cycle. The critical difference is the supply voltage: the 24AA128T-I/SN operates from 1.7V up, while the 24LC128T-I/SN requires a minimum of 2.5V. A board designed for the 24LC128T-I/SN at 3.3V or 5V will accept the 24AA128T-I/SN without rewiring, but the reverse is not guaranteed — the 24LC128T-I/SN will not run on a 1.8V rail. Fully ROHS3 compliant, with no restricted substances above the threshold limits under EU Directive 2011/65/EU.","metaTitle":"Microchip 24LC128T-I/SN EEPROM, 128Kbit I²C, 8-SOIC","metaDescription":"Microchip 24LC128T-I/SN 128Kbit I²C EEPROM, 900 ns access, 2.5-5.5V, -40 to +85°C, 8-SOIC. Active production, ROHS3 compliant. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Technology":"EEPROM","Access Time":"900 ns","Memory Size":"128Kbit","Memory Type":"Non-Volatile","Memory Format":"EEPROM","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","Clock Frequency":"400 kHz","lifecycle_stage":"eol_hot","Memory Interface":"I²C","Voltage - Supply":"2.5V ~ 5.5V","Memory Organization":"16K 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":"$0.75","priceTiers":[{"qty":1,"price":"$0.75000","currency":"USD"},{"qty":3300,"price":"$0.75000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/3f0d9434246e9af63880695c19d97822.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/24LC128T-I%2FSN/alternatives.json"},"ai":{"faq":[{"question":"Will 24LC128T-I/SN drop into a board that was specified around 24AA128T-I/SN without rewiring?","answer":"Yes — the two parts share the same 8-SOIC package, pinout, and I²C interface. The 24LC128T-I/SN requires a minimum supply of 2.5V, so it will not work on a 1.8V rail. If the board runs at 3.3V or 5V, the 24LC128T-I/SN is a direct drop-in replacement with no board change."},{"question":"What compliance documentation does Microchip Technology provide for 24LC128T-I/SN?","answer":"The part is ROHS3 compliant. Microchip provides a Certificate of Compliance (CoC) and material declaration upon request through the supply chain. No REACH, UL, or IEC certification is listed on the standard product record."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/24LC128T-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/24LC128T-I-SN when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}