LM431BCM3

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  "schema_version": 1,
  "type": "component",
  "slug": "lm431bcm3",
  "title": "LM431BCM3",
  "brief": "Texas Instruments Voltage Reference, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
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  "component": {
    "mpn": "LM431BCM3",
    "manufacturer": "Texas Instruments",
    "package": "SOT-23",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Reference",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lm431",
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    "distributor_links": {
      "lcsc": 2156622,
      "digikey": "296-36253-2-ND",
      "mouser": "926-LM431BCM3"
    },
    "distributor_check": {
      "checked_at": "2026-10-03T04:59:49Z",
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      "digikey": {
        "pn": "296-36253-2-ND",
        "status": "found",
        "lifecycle": "Obsolete"
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        "status": "found",
        "lifecycle": "Obsolete"
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    },
    "pins": [
      {
        "number": "1",
        "name": "Cathode",
        "type": "bidirectional",
        "description": "Shunt current/output voltage terminal with operating voltage from VREF to 37 V and current from 1 to 100 mA."
      },
      {
        "number": "2",
        "name": "Reference",
        "type": "input",
        "description": "Reference pin for adjustable output voltage with maximum input current of 10 mA."
      },
      {
        "number": "3",
        "name": "Anode",
        "type": "power_in",
        "description": "Anode pin, normally grounded."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [],
        "pages_sent": 10,
        "cost_usd": 0.1173,
        "at": "2026-10-03T04:59:30"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lm431",
        "pages": 37,
        "sha256": "9c0bcff4967eaad2",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    }
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOT-23",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    }
  },
  "variants": [],
  "sections": [
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  "discovery_triggers": [
    "lm431bcm3"
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  "discovery_pitch": "LM431BCM3 (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
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    "type": "image",
    "path": "docs/hero.png"
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  "visibility": {
    "public": true
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}