CJ431 ±0.5%

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  "title": "CJ431 ±0.5%",
  "brief": "Changjing Voltage Reference, TO-92-3. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
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    "mpn": "CJ431 ±0.5%",
    "manufacturer": "Changjing",
    "package": "TO-92-3",
    "pin_count": 3,
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    "subcategory": "Voltage Reference",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/dca1b312f3e4467c9202db2f691d7926.pdf",
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    "pins": [
      {
        "number": "1",
        "name": "REF",
        "type": "input",
        "description": "Reference input. High-impedance input to the internal error amplifier; the device sinks cathode current to regulate this pin to Vref ≈ 2.5 V (2.487-2.513 V for the ±0.5% grade). Typical bias current 1.5 µA (max 4 µA)."
      },
      {
        "number": "2",
        "name": "A",
        "type": "power_in",
        "description": "Anode. Return path of the shunt regulator, normally tied to circuit ground/common. Cathode current flows from K to A when the device is in regulation."
      },
      {
        "number": "3",
        "name": "K",
        "type": "power_in",
        "description": "Cathode. Regulated node; sinks 1 mA to 100 mA (absolute max 150 mA) up to VKA = 36 V. Connected to the supply through a series resistor in typical shunt-regulator use."
      }
    ],
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        "pages": 9,
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        "described": 3,
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    "pin1": {
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        0
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        "extents_mm": [
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        "zmin_mm": -2.5,
        "centre_offset_mm": 0.542,
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        "checked": "2026-10-07",
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Changjing",
      "Package": "TO-92-3",
      "Category": "PMIC",
      "Pins": "3"
    }
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  "discovery_pitch": "CJ431 ±0.5% (Changjing) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
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  "visibility": {
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  "variants": [
    {
      "mpn": "CJ431 (marking '431')",
      "kind": "unknown"
    },
    {
      "mpn": "CJ431 (marking 'CJ431')",
      "kind": "unknown"
    },
    {
      "mpn": "CJ431 (bulk)",
      "kind": "unknown"
    },
    {
      "mpn": "CJ431-TA (tape)",
      "kind": "unknown"
    },
    {
      "mpn": "CJ431 ±0.5%CD431 (marking 'CD431')",
      "kind": "packaging"
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  ],
  "updated_at": "2026-09-24T19:05:38.142Z"
}