CJ431B

{
  "slug": "cj431b",
  "version": "0.1.0",
  "type": "component",
  "description": "Changjing Voltage Reference, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "cj431b",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "cj431b.kicad_sym",
    "cj431b.kicad_mod",
    "cj431b.glb",
    "cj431b.step",
    "cj431b.lbr",
    "docs/hero.png",
    "docs/cj431b-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "cj431b-hero.glb",
    "cj431b-hero.overlay.json"
  ],
  "component": {
    "mpn": "CJ431B",
    "manufacturer": "Changjing",
    "package": "SOT-23",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Reference",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589836487077900288",
    "parts": {
      "symbol": "cj431b.kicad_sym",
      "footprint": "cj431b.kicad_mod",
      "model_3d": "cj431b-hero.glb",
      "model_3d_plain": "cj431b.glb",
      "model_3d_step": "cj431b-etched.step",
      "model_3d_step_plain": "cj431b.step",
      "lbr": "cj431b.lbr"
    },
    "distributor_links": {
      "lcsc": "C3031881"
    },
    "distributor_check": {
      "checked_at": "2026-10-09T20:14:26Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "REFERENCE",
        "type": "input",
        "description": "Reference input of the adjustable shunt regulator, where Vref is approximately 2.5V and the reference input current is rated from 0.05 mA to 10 mA."
      },
      {
        "number": "2",
        "name": "CATHODE",
        "type": "passive",
        "description": "Cathode terminal of the shunt regulator, rated for a cathode voltage of 40 V maximum and a continuous cathode current of -100 mA to +150 mA."
      },
      {
        "number": "3",
        "name": "ANODE",
        "type": "passive",
        "description": "Anode terminal of the shunt regulator; the datasheet gives no pin-specific electrical limit for this terminal beyond the device ratings."
      }
    ],
    "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 datasheet lists pin 3 as ANODE but does not state its electrical function or limits, so the type; The datasheet gives a single SOT-23 package with pin numbers 1 REFERENCE, 2 CATHODE, 3 ANODE on page"
        ],
        "pages_sent": 7,
        "cost_usd": 0.0301,
        "at": "2026-10-09T20:12:17"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589836487077900288",
        "pages": 7,
        "sha256": "ee6071469d503f9f",
        "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": [
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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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          3.0,
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        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "dd5d1711204e1d8d26cd11490923bd84340820baa69538c385a4300ec2539bc0",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "cj431b-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          3.0,
          1.2
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        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "45935370bf83e50cbc094270d361f48752ee35429a539e14f054134ba9619d67",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}