{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TLV431BCPK","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TLV431BCPK","canonicalUrl":"https://icboms.com/texas-instruments/TLV431BCPK","factsUrl":"https://icboms.com/api/mcp/products/TLV431BCPK","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TLV431BCPK adjustable shunt voltage reference, ±0.5% tolerance, 1.24 V to 6 V output, 15 mA output, 100 µA cathode current, SOT-89-3, 0°C to 70°C.","salesMarkdown":"## Why the ±0.5% tolerance matters for your reference rail Its headline feature is a ±0.5% initial tolerance on the 1.24 V internal reference — a full grade tighter than the standard 1% grade parts. For a calibration or test-verification engineer, that tolerance is the difference between a pass and a re-spin when the reference sets the threshold for an ADC or comparator. ## Output range and drive capability It can sink up to 15 mA of cathode current, which is enough to bias an optocoupler LED in a feedback loop or set the threshold for a window comparator. ## Package and thermal reality for the SOT-89-3 The TLV431BCPK comes in a SOT-89-3 package (TO-243AA), surface-mount with a large collector tab that improves heat transfer to the PCB. The tab is the cathode terminal, so the copper pour connected to it serves double duty as a thermal path and a low-impedance connection. For a rework or test technician, the SOT-89-3 footprint is straightforward to hand-solder or reflow, but the tab area needs a good solder joint to keep the thermal resistance low — a cold joint on the tab will shift the reference voltage under load.","metaTitle":"TLV431BCPK Adjustable Shunt Voltage Reference","metaDescription":"Texas Instruments TLV431BCPK adjustable shunt voltage reference. 1.24 V to 6 V output, ±0.5% tolerance, SOT-89-3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Tolerance":"±0.5%","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"TO-243AA","Product Status":"Active","Reference Type":"Shunt","Voltage - Input":"-","lifecycle_stage":"eol_hot","Current - Output":"15 mA","Current - Supply":"-","Current - Cathode":"100 µA","Base Product Number":"TLV431","Noise - 0.1Hz to 10Hz":"-","Noise - 10Hz to 10kHz":"-","Operating Temperature":"0°C~70°C(TA)","Voltage - Output (Max)":"6 V","Supplier Device Package":"SOT-89-3","Temperature Coefficient":"-","Voltage - Output (Min/Fixed)":"1.24V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.3397","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/4de43c4ff3ead6fd17ae3f61f4aa48c4.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TLV431BCPK/alternatives.json"},"ai":{"faq":[{"question":"What is the tolerance of the TLV431BCPK?","answer":"The TLV431BCPK has a ±0.5% initial tolerance on the reference voltage. This is the tightest grade in the TLV431 family, making it the choice for applications that need better than 1% accuracy without moving to a higher-cost precision reference."},{"question":"What is the closest pin-compatible alternative to the TLV431BCPK?","answer":"The standard-grade TLV431 (1% tolerance) is pin-compatible and shares the same SOT-89-3 package. The decision between them comes down to the tolerance requirement: the BCPK grade is for designs that need the tighter ±0.5% spec; the standard grade is a cost-down option if the system can tolerate 1% initial error."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TLV431BCPK","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TLV431BCPK when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T18:03:28.771Z","lastPublished":"2026-07-22T18:03:28.771Z","indexable":true}}