{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TL1431AIDT","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"TL1431AIDT","canonicalUrl":"https://icboms.com/stmicroelectronics/TL1431AIDT","factsUrl":"https://icboms.com/api/mcp/products/TL1431AIDT","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics TL1431AIDT adjustable shunt voltage reference, ±0.25% tolerance, 100 mA output, 2.5 V to 36 V, -40°C to 105°C, 8-SOIC surface mount, Tape & Reel.","salesMarkdown":"## Precision shunt reference for industrial power rails The TL1431AIDT is an adjustable shunt voltage reference from STMicroelectronics, delivering a ±0.25% initial tolerance that sets the accuracy floor for the entire feedback loop — critical when the reference error directly multiplies into the output voltage error of a switching supply or linear regulator. Output is adjustable from a 2.5 V minimum up to 36 V, set by two external resistors, making it a drop-in replacement for the classic TL431 in designs that need tighter initial accuracy without a trim pot. Rated for 100 mA cathode current with a minimum of 700 µA to maintain regulation — the 100 mA ceiling means it can sink enough current to drive the optocoupler LED in an isolated flyback primary-side feedback loop without an extra transistor stage. ## Industrial temperature range and drift Operating from -40°C to 105°C, the TL1431AIDT covers the full industrial temperature band — a base-station PSU that sees 85°C internal ambient still has 20°C of margin before the reference hits its upper limit. Temperature coefficient is 100 ppm/°C typical, which translates to a 2.5 mV shift over a 100°C span at the 2.5 V nominal output — small enough that a 12-bit ADC with a 2.5 V reference sees less than 1 LSB of drift from the reference alone. ## SOIC-8 surface-mount package for automated assembly Housed in an 8-SOIC package (3.90 mm body width), the TL1431AIDT fits standard pick-and-place and reflow profiles — the same footprint as the industry-standard TL431 in SOIC-8, so a board laid out for that part accepts this one without a layout change. Available in Tape & Reel or Cut Tape options — the reel format suits volume production, while cut tape works for prototype runs and small-batch builds. ## Active production and compliance status RoHS3 compliant (2011/65/EU + 2015/863), with no restricted substances above the threshold — the part ships without a conflict-minerals or REACH exemption letter needed for EU-market equipment.","metaTitle":"STMicroelectronics TL1431AIDT Shunt Reference, ±0.25%","metaDescription":"TL1431AIDT adjustable shunt voltage reference, ±0.25% tolerance, 100 mA output, -40°C to 105°C, SOIC-8. Active production, RoHS3 compliant. Request a quote.","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)","Tolerance":"±0.25%","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","Reference Type":"Shunt","lifecycle_stage":"eol_hot","Current - Output":"100 mA","Current - Cathode":"700 µA","Operating Temperature":"-40°C ~ 105°C (TA)","Voltage - Output (Max)":"36 V","Supplier Device Package":"8-SOIC","Temperature Coefficient":"100ppm/°C","Voltage - Output (Min/Fixed)":"2.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.75","priceTiers":[{"qty":1,"price":"$0.75000","currency":"USD"},{"qty":10,"price":"$0.66300","currency":"USD"},{"qty":25,"price":"$0.62320","currency":"USD"},{"qty":100,"price":"$0.50850","currency":"USD"},{"qty":250,"price":"$0.47232","currency":"USD"},{"qty":500,"price":"$0.40198","currency":"USD"},{"qty":1000,"price":"$0.32158","currency":"USD"},{"qty":2500,"price":"$0.29144","currency":"USD"},{"qty":5000,"price":"$0.27134","currency":"USD"},{"qty":12500,"price":"$0.26129","currency":"USD"},{"qty":25000,"price":"$0.25124","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/996cef81569de296d9e0e139436fbf9c.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TL1431AIDT/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for TL1431AIDT?","answer":"The TL1431AIYDT is the automotive-grade (AEC-Q100) sibling with the same ±0.25% tolerance and 100 mA output, but rated from -40°C to 125°C instead of -40°C to 105°C. It drops into the same SOIC-8 footprint without rewiring, making it a direct functional cross-reference for designs that need a wider temperature range or automotive qualification."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/TL1431AIDT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/TL1431AIDT 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}}