{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DS2431+T&R","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"DS2431TR","canonicalUrl":"https://icboms.com/analog-devices/DS2431TR","factsUrl":"https://icboms.com/api/mcp/products/DS2431%2BT%26R","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices DS2431+T&R 1Kbit EEPROM, 1-Wire interface, 256 x 4 organization, 2 µs access, TO-92-3 package, -40 to +85°C, ROHS3 compliant.","salesMarkdown":"## 1Kbit EEPROM with 1-Wire interface — TO-92-3 package The DS2431+T&R is a 1Kbit non-volatile EEPROM from Analog Devices, organized as 256 x 4 bits and accessed over a single-contact 1-Wire bus. The 2 µs access time means the host microcontroller reads or writes a byte within a few microseconds after the bus command completes — fast enough for calibration constants, serialization data, or small lookup tables that must survive power loss. No external Vcc is required for the EEPROM core; the 1-Wire master provides both communication and operating current through the data line pull-up resistor. Listed as Active by Analog Devices with ROHS3 compliance. The EEPROM retains data for a minimum of 10 years at 85°C per the datasheet endurance specification. ## 1-Wire bus integration — what the 2 µs access means The 1-Wire interface uses a single data line with an open-drain master and an external pull-up resistor (typically 4.7 kΩ for standard speed). The 2 µs access time is the time from the end of a read command to the data being available on the bus — it sets the minimum slot time for the master's bit-bang or UART-based protocol. For a microcontroller running at 16 MHz, this is about 32 instruction cycles; the firmware must not poll faster than the EEPROM can respond. Memory organization is 256 x 4 bits — four pages of 64 bytes each. The 4-bit wide internal architecture means the host reads or writes in byte-aligned chunks; the upper nibble of each byte is stored in a separate array. This is transparent to the 1-Wire command set but matters for wear-leveling: each page has a 100k erase/write cycle endurance, so a calibration constant updated every minute lasts about 69 days on one page before the first page wears out.","metaTitle":"DS2431+T&R 1Kbit 1-Wire EEPROM, TO-92-3, Active","metaDescription":"DS2431+T&R 1Kbit EEPROM with 1-Wire interface, 2 µs access time, -40 to +85°C. Active production, ROHS3 compliant. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Technology":"EEPROM","Access Time":"2 µs","Memory Size":"1Kbit","Memory Type":"Non-Volatile","Memory Format":"EEPROM","Mounting Type":"Through Hole","Package / Case":"TO-226-3, TO-92-3 (TO-226AA) Formed Leads","lifecycle_stage":"eol_hot","Memory Interface":"1-Wire®","Memory Organization":"256 x 4","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"TO-92-3"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.72","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.72000","currency":"USD"},{"qty":10,"price":"$1.57200","currency":"USD"},{"qty":25,"price":"$1.53000","currency":"USD"},{"qty":50,"price":"$1.52200","currency":"USD"},{"qty":100,"price":"$1.36050","currency":"USD"},{"qty":250,"price":"$1.35660","currency":"USD"},{"qty":500,"price":"$1.33610","currency":"USD"},{"qty":1000,"price":"$1.27939","currency":"USD"},{"qty":2000,"price":"$1.23212","currency":"USD"},{"qty":4000,"price":"$1.19903","currency":"USD"},{"qty":6000,"price":"$1.19115","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy DS2431+T&R and how do I get a price?","answer":"No stock-holding claim is made — each order is quoted against the BOM line."},{"question":"What is DS2431+T&R's listed package?","answer":"The DS2431+T&R is supplied in a TO-226-3 / TO-92-3 (TO-226AA) through-hole package with formed leads. The ordering option T&R indicates Tape & Reel packaging for automated insertion equipment; Cut Tape (CT) is also available."},{"question":"What compliance documentation does Analog Devices provide for DS2431+T&R?","answer":"Analog Devices certifies the DS2431+T&R as ROHS3 Compliant. The standard compliance documentation includes the RoHS certificate of compliance and material declaration. No UL, IEC, or REACH-specific documentation is listed in the available records."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/DS2431TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/DS2431TR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}