{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM431BCMX","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM431BCMX","canonicalUrl":"https://icboms.com/texas-instruments/LM431BCMX","factsUrl":"https://icboms.com/api/mcp/products/LM431BCMX","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM431 series adjustable shunt voltage reference, LM431BCMX, 2.495V, ±1% tolerance, 100 mA output, 8-SOIC surface mount, active production.","salesMarkdown":"## Precision shunt reference in a standard SOIC footprint The Texas Instruments LM431BCMX is an adjustable shunt voltage reference with a 2.495 V minimum output and a ±1% tolerance band that holds the reference voltage tighter than the standard 2% grade — a meaningful difference when the ADC or comparator threshold budget is tight. Rated for 100 mA continuous cathode current and a 36 V maximum output, this part covers the common 3.3 V to 24 V rail-derived reference designs in industrial control and instrumentation. The 50 ppm/°C typical temperature coefficient means the output drifts less than 0.5 mV over a 10 °C change at the 2.5 V setpoint — stable enough for a 12-bit ADC reference without external trimming. ## Package and operating range for board-level fit Rated for -25 °C to 85 °C ambient operation, the temperature grade suits equipment in ventilated enclosures, telecom shelters, and factory-floor cabinets — not extended to the full -40 °C industrial band, so check the cold-end margin if the design sees outdoor startup below -25 °C. The shunt architecture requires a minimum 1 mA cathode current to maintain regulation; the external resistor from the supply rail to the cathode must be sized to deliver this at the lowest supply voltage and highest load current.","metaTitle":"Texas Instruments LM431BCMX Shunt Reference, ±1%, 8-SOIC","metaDescription":"Texas Instruments LM431BCMX adjustable shunt voltage reference, 2.495V, ±1% tolerance, 100 mA output, 8-SOIC. Active lifecycle, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Bulk","Tolerance":"±1%","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":"-25°C ~ 85°C (TA)","Voltage - Output (Max)":"36 V","Supplier Device Package":"8-SOIC","Temperature Coefficient":"50ppm/°C Typical","Voltage - Output (Min/Fixed)":"2.495V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.15","stockQuantity":0,"priceTiers":[{"qty":2500,"price":"$0.15000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/6b430b0e4a8a1615fde334162c430e8d.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What package does the LM431BCMX come in?","answer":"It is supplied in an 8-SOIC surface-mount package (0.154\" body width, 3.90 mm) with a bulk shipping format."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM431BCMX","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM431BCMX 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}}