CJ4054A420M

{
  "slug": "cj4054a420m",
  "version": "0.1.0",
  "type": "component",
  "description": "Changjing Pre-ordered transistors, SOT-23-5L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "triode-mos tube-transistor",
    "cj4054a420m",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "cj4054a420m.kicad_sym",
    "cj4054a420m.kicad_mod",
    "cj4054a420m.glb",
    "cj4054a420m.step",
    "cj4054a420m.lbr",
    "docs/hero.png",
    "docs/cj4054a420m-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "cj4054a420m-hero.glb",
    "cj4054a420m-hero.overlay.json",
    "cj4054a420m-etched.glb"
  ],
  "component": {
    "mpn": "CJ4054A420M",
    "manufacturer": "Changjing",
    "package": "SOT-23-5L",
    "pin_count": 5,
    "category": "Triode/MOS Tube/Transistor",
    "subcategory": "Pre-ordered transistors",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/4e7c19e0e170c8ebc5fdb4e64990224e.pdf",
    "parts": {
      "symbol": "cj4054a420m.kicad_sym",
      "footprint": "cj4054a420m.kicad_mod",
      "model_3d": "cj4054a420m-hero.glb",
      "model_3d_plain": "cj4054a420m-etched.glb",
      "model_3d_step": "cj4054a420m-etched.step",
      "model_3d_step_plain": "cj4054a420m.step",
      "lbr": "cj4054a420m.lbr"
    },
    "distributor_links": {
      "lcsc": "C2829437"
    },
    "distributor_check": {
      "checked_at": "2026-11-12T17:56:17Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "CHRG",
        "type": "output",
        "description": "Open-drain charge status output that is pulled low by an internal N-channel MOSFET (about 10mA sink) while charging and is high impedance during undervoltage lockout."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground terminal."
      },
      {
        "number": "3",
        "name": "BAT",
        "type": "bidirectional",
        "description": "Charger power stage current output and battery voltage sense input that regulates the final float voltage (4.20V for CJ4054A420M) and should be bypassed to GND with a 10µF to 47µF capacitor, drawing less than 2µA in shutdown or sleep mode."
      },
      {
        "number": "4",
        "name": "VCC",
        "type": "power_in",
        "description": "Charger positive input supply, specified from 4.5V to 6.5V and to be bypassed with at least a 4.7µF capacitor, which enters low-power sleep mode when VCC drops to within 80mV of the BAT voltage."
      },
      {
        "number": "5",
        "name": "PROG",
        "type": "output",
        "description": "Charge current program, charge current monitor and shutdown pin, programmed by a 1% RPROG resistor to GND (regulated to 1V in constant-current mode and 0.1V in pre-conditioning), with a 1.21V shutdown threshold and an approximately 2.4V clamp."
      }
    ],
    "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 SOT-23-5L pin numbers were read from the first numeric column of Table 1 (SOT-23-5L column, whic; The extracted text drops the micro symbol (µ) in several places, so the BAT shutdown/sleep leakage i; The datasheet classifies BAT as I/O and PROG as O; these were mapped to KiCad 'bidirectional' and 'o"
        ],
        "pages_sent": 13,
        "cost_usd": 0.004,
        "at": "2026-11-12T17:56:04"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/4e7c19e0e170c8ebc5fdb4e64990224e.pdf",
        "pages": 33,
        "sha256": "96f60dc73e5facbc",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "model_3d_generated": {
        "generator": "factory/gen_pkg3d.py",
        "family": "SOT",
        "height_mm": 1.15,
        "height_basis": "datasheet A, midpoint of min and max",
        "standoff_mm": 0.05,
        "standoff_basis": "family nominal (no datasheet A1 read)",
        "lead_width_mm": 0.36,
        "lead_width_basis": "default: 0.6 x pad width across the lead, at most 0.45 x pitch 0.95 mm; a tab 0.9 x its width (no datasheet b read)",
        "lead_thickness_mm": 0.172,
        "lead_thickness_basis": "default for pitch 0.95 mm, height 1.15 mm (no datasheet c read)"
      },
      "pins": {
        "total": 5,
        "described": 5,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "cj4054a420m.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.92,
          1.15
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "dd3e1f7d5a2f22d18c0296128df35c4b7109304d35232c1a6edac5ac2afbe6d9",
        "checked": "2026-11-12",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "cj4054a420m-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.92,
          1.15
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "1ed2a6d09fcc65d3a63f9593444917465c7f21dd9dd2d5b843cbdcc8aa8eef8f",
        "checked": "2026-11-12",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "SOT-23-5L",
      "source_page": 31,
      "D": {
        "nom_mm": 2.92,
        "range_mm": [
          2.82,
          3.02
        ]
      },
      "E1": {
        "nom_mm": 1.6,
        "range_mm": [
          1.5,
          1.7
        ]
      },
      "E": {
        "nom_mm": 2.8,
        "range_mm": [
          2.65,
          2.95
        ]
      },
      "e": {
        "nom_mm": 0.95,
        "range_mm": [
          null,
          null
        ]
      },
      "A": {
        "nom_mm": 1.15,
        "range_mm": [
          1.05,
          1.25
        ]
      },
      "source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
      "model_check": {
        "file": "cj4054a420m.step",
        "verdict": "PASS",
        "reasons": [
          "height and body within the datasheet's package drawing"
        ],
        "by": "factory/package_fit.py"
      }
    }
  }
}