LM431AIZ

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm431aiz",
  "title": "LM431AIZ",
  "brief": "Texas Instruments Voltage Reference, TO-92-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "power management (pmic)",
    "lm431aiz",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "LM431AIZ",
    "manufacturer": "Texas Instruments",
    "package": "TO-92-3",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Reference",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lm431",
    "parts": {
      "symbol": "lm431aiz.kicad_sym",
      "footprint": "lm431aiz.kicad_mod",
      "model_3d": "lm431aiz-hero.glb",
      "model_3d_plain": "lm431aiz.glb",
      "model_3d_step": "lm431aiz-etched.step",
      "model_3d_step_plain": "lm431aiz.step",
      "lbr": "lm431aiz.lbr"
    },
    "distributor_links": {
      "lcsc": "C2873338",
      "digikey": "2156-LM431AIZ-600039-ND",
      "mouser": "512-LM431AIZ"
    },
    "distributor_check": {
      "checked_at": "2026-10-08T18:51:44Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "2156-LM431AIZ-600039-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "512-LM431AIZ",
        "status": "found",
        "lifecycle": "End of Life"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "Cathode",
        "type": "bidirectional",
        "description": "Shunt current/output voltage pin; the datasheet limits cathode voltage to 37 V and continuous cathode current to -10 to 150 mA absolute maximum, with 1 to 100 mA recommended."
      },
      {
        "number": "2",
        "name": "Reference",
        "type": "input",
        "description": "Reference pin for setting the adjustable output voltage (VREF is 2.5 V typical per the device description), with reference input current limited to 10 mA absolute maximum."
      },
      {
        "number": "3",
        "name": "Anode",
        "type": "power_in",
        "description": "Anode pin, normally grounded; the datasheet lists it as an output (O) type, but it is classed here as power_in because it is the normally grounded common terminal."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The TO-92 top-view drawing is not in the extracted text. Pin numbers 1, 2, 3 were taken from the TO-; The datasheet labels the Anode as type O (output). I classed it as power_in (normally grounded) per ; The 2.5 V reference value in the Reference description comes from the Features/Description text (VRE"
        ],
        "pages_sent": 10,
        "cost_usd": 0.0598,
        "at": "2026-10-08T18:51:14"
      },
      "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"
    },
    "models_3d": [
      {
        "file": "lm431aiz.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          4.83,
          3.745,
          9.8
        ],
        "zmin_mm": -2.5,
        "centre_offset_mm": 0.542,
        "footprint_binding": "identity",
        "sha256": "f0b61c32ecbf0067157adc5a3d4966ceadf5d6dafe93c51af35f76c41c71a54a",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm431aiz-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          4.83,
          3.745,
          9.8
        ],
        "zmin_mm": -2.5,
        "centre_offset_mm": 0.542,
        "footprint_binding": "identity",
        "sha256": "d80c3d631f30b42862525c49f9beedd48abcf72b9069595c7590169b73db79dd",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "TO-92-3",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "lm431aiz"
  ],
  "discovery_pitch": "LM431AIZ (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lm431aiz.kicad_sym",
    "lm431aiz.kicad_mod",
    "lm431aiz.glb",
    "lm431aiz.step",
    "lm431aiz.lbr",
    "docs/hero.png",
    "docs/lm431aiz-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm431aiz-hero.glb",
    "lm431aiz-hero.overlay.json"
  ],
  "visibility": {
    "public": true
  }
}