main
Ray Set visibility: public 84da15a 17d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "sgm431vbxn3lg",
  "title": "SGM431VBXN3LG",
  "brief": "SGMICRO Voltage Reference, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
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    "mpn": "SGM431VBXN3LG",
    "manufacturer": "SGMICRO",
    "package": "SOT-23",
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    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Reference",
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    "parts": {
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      "footprint": "sgm431vbxn3lg.kicad_mod",
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      "lbr": "sgm431vbxn3lg.lbr"
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    "distributor_links": {
      "lcsc": "C5152082"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T23:54:52Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
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        "status": "quota"
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    },
    "pins": [
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        "number": "1",
        "name": "REF",
        "type": "input",
        "description": "Threshold input relative to the common anode; the internal reference is approximately 1.24V, and the cathode voltage is set by the external divider tied to this pin."
      },
      {
        "number": "2",
        "name": "CATHODE",
        "type": "bidirectional",
        "description": "Shunt current/voltage input; the cathode voltage must stay between VREF and 18V and the cathode current between 0.1mA and 70mA."
      },
      {
        "number": "3",
        "name": "ANODE",
        "type": "passive",
        "description": "Common pin, normally connected to ground; all voltage ratings are referenced to the anode."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
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        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
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        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet lists ANODE as type 'O' (output), but it is the common pin normally connected to groun; The datasheet gives a single SOT-23 pinout for both the SGM431VA and SGM431VB ordering numbers, so t"
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        "pages_sent": 16,
        "cost_usd": 0.0614,
        "at": "2026-10-17T23:52:50"
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        "pages": 16,
        "sha256": "5277ea25e407e75a",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
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        "refuses_to_fabricate": true
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "dd5d1711204e1d8d26cd11490923bd84340820baa69538c385a4300ec2539bc0",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  "metadata": {
    "specs": {
      "Manufacturer": "SGMICRO",
      "Package": "SOT-23",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "5277ea25e407e75a33a48949f02f1c4e27a530fca582b2e5d881e6b5f65816e6",
      "rows": [
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          "name": "Reference Voltage (TJ = +25℃)",
          "symbol": "VREF",
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          "unit": "V",
          "min": 1.234,
          "typ": 1.24,
          "max": 1.246,
          "conditions": "VKA = VREF, IKA = 10mA, TJ = +25℃",
          "source_page": 4,
          "source": "datasheet"
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          "name": "Reference Voltage (TJ = -40℃ to +125℃)",
          "symbol": "VREF",
          "kind": "electrical",
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          "min": 1.225,
          "typ": null,
          "max": 1.255,
          "conditions": "VKA = VREF, IKA = 10mA, TJ = -40℃ to +125℃",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Deviation of Reference Input Voltage over Full Temperature Range",
          "symbol": "VI(DEV)",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 2,
          "max": 10,
          "conditions": "VKA = VREF, IKA = 10mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Ratio of Change in Reference Voltage to the Change in Cathode Voltage",
          "symbol": "ΔVREF/ΔVKA",
          "kind": "voltage_coefficient",
          "unit": "mV/V",
          "min": null,
          "typ": -0.1,
          "max": -0.2,
          "conditions": "IKA = 10mA, VKA = VREF to 18V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Reference Input Current",
          "symbol": "IREF",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.06,
          "max": 0.15,
          "conditions": "IKA = 10mA, R1 = 10kΩ, R2 = open, see Figure 9",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Deviation of Reference Input Current over Full Temperature Range",
          "symbol": "II(DEV)",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.15,
          "max": 0.5,
          "conditions": "IKA = 10mA, R1 = 10kΩ, R2 = open, see Figure 9",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Minimum Cathode Current for Regulation",
          "symbol": "IMIN",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 65,
          "max": 80,
          "conditions": "VKA = VREF",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Off-State Cathode Current",
          "symbol": "IK(OFF)",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.01,
          "max": 0.1,
          "conditions": "VKA = 18V, VREF = 0V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Dynamic Impedance",
          "symbol": "|ZKA|",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 0.1,
          "max": 0.3,
          "conditions": "VKA = VREF, f ≤ 1kHz, IKA = 0.1mA to 70mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Cathode Voltage (recommended)",
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          "kind": "recommended_operating",
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          "min": null,
          "typ": null,
          "max": 18,
          "conditions": "",
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        },
        {
          "name": "Operating Junction Temperature Range (recommended)",
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          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
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        },
        {
          "name": "Junction Temperature (absolute maximum)",
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          "unit": "℃",
          "min": null,
          "typ": null,
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          "conditions": "",
          "source_page": 2,
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        },
        {
          "name": "Storage Temperature Range",
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          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Lead Temperature (Soldering)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "Soldering, 10s",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Package Thermal Resistance, SOT-23 (junction to ambient)",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "℃/W",
          "min": null,
          "typ": 290,
          "max": null,
          "conditions": "SOT-23",
          "source_page": 2,
          "source": "datasheet"
        }
      ]
    }
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  "discovery_triggers": [
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  "discovery_pitch": "SGM431VBXN3LG (SGMICRO) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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