main
Ray Set visibility: public 70b8bbb 7d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "tl431aim3",
  "title": "TL431AIM3",
  "brief": "HGSEMI 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",
  "tags": [
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    "power management (pmic)",
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    "factory-2.0.0",
    "extractor-text"
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  "component": {
    "mpn": "TL431AIM3",
    "manufacturer": "HGSEMI",
    "package": "SOT-23",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Reference",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603515460080594944",
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      "footprint": "tl431aim3.kicad_mod",
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      "lbr": "tl431aim3.lbr"
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    "distributor_links": {
      "lcsc": "C30170091"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T11:26:12Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "CATHODE",
        "type": "bidirectional",
        "description": "Shunt current/voltage input; the datasheet recommends a cathode current of 1 mA to 100 mA and a cathode voltage from Vref to 36 V (absolute maximum cathode voltage 37 V)."
      },
      {
        "number": "2",
        "name": "REF",
        "type": "input",
        "description": "Threshold (reference) input relative to the common anode, regulated to about 2.495 V; it must not float and needs IREF of at least 4 µA, with a reference input current absolute range of -0.05 mA to 10 mA."
      },
      {
        "number": "3",
        "name": "ANODE",
        "type": "power_in",
        "description": "Common anode pin, normally connected to ground, and the reference point for the REF threshold."
      }
    ],
    "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 pin-function table on page 4 is garbled in the text extraction. The TL431x SOT-23 column was ass; The datasheet lists ANODE as type 'O' (output). It is the common/ground pin ('normally connected to ; A footnote states 'Pin 2 is attached to Substrate and must be connected to ANODE or left open.' Its "
        ],
        "pages_sent": 28,
        "cost_usd": 0.098,
        "at": "2026-10-18T11:25:20"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603515460080594944",
        "pages": 28,
        "sha256": "813a3480f783af2b",
        "source_tier": "lcsc"
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      "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"
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.5,
          3,
          1.2
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "dd5d1711204e1d8d26cd11490923bd84340820baa69538c385a4300ec2539bc0",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "tl431aim3-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
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        "centre_offset_mm": 0,
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        "sha256": "478736710e370ab0ef4c7bdfc7e3b299f99c94aacc65d0b179e909916127644e",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "HGSEMI",
      "Package": "SOT-23",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "813a3480f783af2b0e10da16ff29083ec0d882504e7bfb9a3137909b759ebdb6",
      "rows": [
        {
          "name": "Reference voltage",
          "symbol": "Vref",
          "kind": "electrical",
          "unit": "mV",
          "min": 2470,
          "typ": 2495,
          "max": 2520,
          "conditions": "VKA = Vref, IKA = 10 mA",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Deviation of reference input voltage over full temperature range (SOT-23 device)",
          "symbol": "VI(dev)",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 14,
          "max": 34,
          "conditions": "VKA = Vref, IKA = 10 mA",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Ratio of change in reference voltage to change in cathode voltage (VKA 10 V to Vref)",
          "symbol": "ΔVref/ΔVKA",
          "kind": "electrical",
          "unit": "mV/V",
          "min": null,
          "typ": -1.4,
          "max": -2.7,
          "conditions": "IKA = 10 mA, ΔVKA = 10 V – Vref",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Ratio of change in reference voltage to change in cathode voltage (VKA 10 V to 36 V)",
          "symbol": "ΔVref/ΔVKA",
          "kind": "electrical",
          "unit": "mV/V",
          "min": null,
          "typ": -1,
          "max": -2,
          "conditions": "IKA = 10 mA, ΔVKA = 36 V – 10 V",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Reference input current",
          "symbol": "Iref",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 2,
          "max": 4,
          "conditions": "IKA = 10 mA, R1 = 10 kΩ, R2 = ∞",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Deviation of reference input current over full temperature range",
          "symbol": "II(dev)",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.8,
          "max": 2.5,
          "conditions": "IKA = 10 mA, R1 = 10 kΩ, R2 = ∞",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Minimum cathode current for regulation",
          "symbol": "Imin",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.4,
          "max": 0.7,
          "conditions": "VKA = Vref",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Off-state cathode current",
          "symbol": "Ioff",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.1,
          "max": 0.5,
          "conditions": "VKA = 36 V, Vref = 0",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Dynamic impedance",
          "symbol": "|zKA|",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 0.2,
          "max": 0.5,
          "conditions": "VKA = Vref, f ≤ 1 kHz, IKA = 1 mA to 100 mA",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Cathode voltage (recommended)",
          "symbol": "VKA",
          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 36,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Cathode current (recommended)",
          "symbol": "IKA",
          "kind": "recommended_operating",
          "unit": "mA",
          "min": 1,
          "typ": null,
          "max": 100,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Operating free-air temperature (TL431I/TL432I)",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "TL43xxI",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Cathode voltage (absolute maximum)",
          "symbol": "VKA",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 37,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Continuous cathode current range",
          "symbol": "IKA",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -100,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Reference input current range",
          "symbol": "II(ref)",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -0.05,
          "typ": null,
          "max": 10,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Operating virtual junction temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature range",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Lead temperature (soldering)",
          "symbol": "TL",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 245,
          "conditions": "Soldering, 10 seconds",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Electrostatic discharge, human-body model",
          "symbol": "V(ESD)",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -2000,
          "typ": null,
          "max": 2000,
          "conditions": "HBM, per ANSI/ESDA/JEDEC JS-001",
          "source_page": 5,
          "source": "datasheet"
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        {
          "name": "Electrostatic discharge, charged-device model",
          "symbol": "V(ESD)",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -1000,
          "typ": null,
          "max": 1000,
          "conditions": "CDM, per JEDEC JESD22-C101",
          "source_page": 5,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
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    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "tl431aim3"
  ],
  "discovery_pitch": "TL431AIM3 (HGSEMI) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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    "tl431aim3-etched.glb"
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    "public": true
  }
}