{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM431AIMX","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM431AIMX","canonicalUrl":"https://icboms.com/texas-instruments/LM431AIMX","factsUrl":"https://icboms.com/api/mcp/products/LM431AIMX","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM431AIMX adjustable shunt voltage reference, ±2% tolerance, 100 mA output, 2.5V to 36V, 8-SOIC surface mount, bulk package.","salesMarkdown":"The LM431AIMX from Texas Instruments is an adjustable shunt voltage reference in an 8-SOIC package. It sets a reference voltage from 2.5 V up to 36 V, sourcing up to 100 mA from the cathode. The minimum cathode current for regulation is 1 mA. The 8-SOIC footprint (3.90 mm width) is common for board-level power supply and bias circuits where a precision shunt reference is needed. ## Lifecycle and compliance The part is RoHS non-compliant per the manufacturer's current declaration. For new designs requiring RoHS compliance, a functional alternative like the TL431IDBVR (same basic die, ±2.2% tolerance, SOT-23 package) is worth evaluating. ## Functional second-source fit The closest functional peer is the TL431IDBVR, also a shunt reference from Texas Instruments. Both are adjustable from 2.5 V and source 100 mA, but the TL431IDBVR is in a smaller SOT-23 package and has a slightly looser ±2.2% tolerance. The 8-SOIC footprint of the LM431AIMX is larger than the SOT-23, so a board respin is required if swapping to the TL431IDBVR. The electrical characteristics are otherwise very close.","metaTitle":"LM431AIMX Texas Instruments Shunt Reference","metaDescription":"Texas Instruments LM431AIMX adjustable shunt voltage reference, ±2% tolerance, 100 mA output, 8-SOIC. Active production, sourced to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"RoHS non-compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Bulk","Tolerance":"±2%","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":"1 mA","Operating Temperature":"-40°C ~ 85°C (TA)","Voltage - Output (Max)":"36 V","Supplier Device Package":"8-SOIC","Temperature Coefficient":"50ppm/°C Typical","Voltage - Output (Min/Fixed)":"2.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.21","stockQuantity":0,"priceTiers":[{"qty":1397,"price":"$0.21000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/6b430b0e4a8a1615fde334162c430e8d.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy LM431AIMX and how do I get a price?","answer":"We source the LM431AIMX through franchised and independent channels. Submit an RFQ for current availability and pricing — no minimum order quantity."},{"question":"When sourcing LM431AIMX, what's the closest functional second-source — TL431IDBVR?","answer":"The TL431IDBVR is the closest functional second-source. Both are 2.5 V adjustable shunt references with 100 mA output, but the TL431IDBVR is in a SOT-23 package and has ±2.2% tolerance vs ±2% for the LM431AIMX. The pinout and footprint differ, so a board change is needed."},{"question":"What is LM431AIMX's listed tolerance (±2%) on this Discrete Semiconductors line?","answer":"The initial output voltage tolerance is ±2% at 25°C."},{"question":"Will LM431AIMX drop into a panel that was specified around TL431IDBVR without rewiring?","answer":"No. The LM431AIMX is in an 8-SOIC package, while the TL431IDBVR is SOT-23. The pinouts and footprints are different, so a board respin is required. Electrically they are very close, but the mechanical fit is not direct."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM431AIMX","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM431AIMX 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}}