ULN2803

{
  "slug": "uln2803",
  "version": "0.1.0",
  "type": "component",
  "description": "IDCHIP Darlington Transistor Arrays, SSOP-24. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "transistors-thyristors",
    "uln2803",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "uln2803.kicad_sym",
    "uln2803.kicad_mod",
    "uln2803.glb",
    "uln2803.step",
    "uln2803.lbr",
    "docs/hero.png",
    "docs/uln2803-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "uln2803-hero.glb",
    "uln2803-hero.overlay.json",
    "uln2803-etched.glb"
  ],
  "component": {
    "mpn": "ULN2803",
    "manufacturer": "IDCHIP",
    "package": "SSOP-24",
    "pin_count": 24,
    "category": "Transistors/Thyristors",
    "subcategory": "Darlington Transistor Arrays",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603128890785349632",
    "parts": {
      "symbol": "uln2803.kicad_sym",
      "footprint": "uln2803.kicad_mod",
      "model_3d": "uln2803-hero.glb",
      "model_3d_plain": "uln2803-etched.glb",
      "model_3d_step": "uln2803-etched.step",
      "model_3d_step_plain": "uln2803.step",
      "lbr": "uln2803.lbr"
    },
    "distributor_links": {
      "lcsc": "C18164409"
    },
    "distributor_check": {
      "checked_at": "2026-10-19T03:20:32Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection (empty pin per the pin description table)."
      },
      {
        "number": "2",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection (empty pin per the pin description table)."
      },
      {
        "number": "3",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection (empty pin per the pin description table)."
      },
      {
        "number": "4",
        "name": "1B",
        "type": "input",
        "description": "Channel 1 Darlington base input; VIN(ON) is 2 to 7 V to turn the output on and VIN(OFF) is 0 to 0.6 V to turn it off, with an internal pull-down to ground."
      },
      {
        "number": "5",
        "name": "2B",
        "type": "input",
        "description": "Channel 2 Darlington base input; VIN(ON) is 2 to 7 V to turn the output on and VIN(OFF) is 0 to 0.6 V to turn it off, with an internal pull-down to ground."
      },
      {
        "number": "6",
        "name": "3B",
        "type": "input",
        "description": "Channel 3 Darlington base input; VIN(ON) is 2 to 7 V to turn the output on and VIN(OFF) is 0 to 0.6 V to turn it off, with an internal pull-down to ground."
      },
      {
        "number": "7",
        "name": "4B",
        "type": "input",
        "description": "Channel 4 Darlington base input; VIN(ON) is 2 to 7 V to turn the output on and VIN(OFF) is 0 to 0.6 V to turn it off, with an internal pull-down to ground."
      },
      {
        "number": "8",
        "name": "5B",
        "type": "input",
        "description": "Channel 5 Darlington base input; VIN(ON) is 2 to 7 V to turn the output on and VIN(OFF) is 0 to 0.6 V to turn it off, with an internal pull-down to ground."
      },
      {
        "number": "9",
        "name": "6B",
        "type": "input",
        "description": "Channel 6 Darlington base input; VIN(ON) is 2 to 7 V to turn the output on and VIN(OFF) is 0 to 0.6 V to turn it off, with an internal pull-down to ground."
      },
      {
        "number": "10",
        "name": "7B",
        "type": "input",
        "description": "Channel 7 Darlington base input; VIN(ON) is 2 to 7 V to turn the output on and VIN(OFF) is 0 to 0.6 V to turn it off, with an internal pull-down to ground."
      },
      {
        "number": "11",
        "name": "8B",
        "type": "input",
        "description": "Channel 8 Darlington base input; VIN(ON) is 2 to 7 V to turn the output on and VIN(OFF) is 0 to 0.6 V to turn it off, with an internal pull-down to ground."
      },
      {
        "number": "12",
        "name": "E",
        "type": "power_in",
        "description": "Common emitter of all eight Darlington channels, used as the power ground (electrical ground) connection."
      },
      {
        "number": "13",
        "name": "COM",
        "type": "power_in",
        "description": "Common node of the output clamp diodes for inductive-load flyback; clamp reverse voltage is 18 V and clamp forward peak current is 350 mA in the recommended conditions."
      },
      {
        "number": "14",
        "name": "8C",
        "type": "output",
        "description": "Channel 8 Darlington collector output (open collector); absolute maximum collector-emitter voltage 15 V and peak collector current 500 mA per channel."
      },
      {
        "number": "15",
        "name": "7C",
        "type": "output",
        "description": "Channel 7 Darlington collector output (open collector); absolute maximum collector-emitter voltage 15 V and peak collector current 500 mA per channel."
      },
      {
        "number": "16",
        "name": "6C",
        "type": "output",
        "description": "Channel 6 Darlington collector output (open collector); absolute maximum collector-emitter voltage 15 V and peak collector current 500 mA per channel."
      },
      {
        "number": "17",
        "name": "5C",
        "type": "output",
        "description": "Channel 5 Darlington collector output (open collector); absolute maximum collector-emitter voltage 15 V and peak collector current 500 mA per channel."
      },
      {
        "number": "18",
        "name": "4C",
        "type": "output",
        "description": "Channel 4 Darlington collector output (open collector); absolute maximum collector-emitter voltage 15 V and peak collector current 500 mA per channel."
      },
      {
        "number": "19",
        "name": "3C",
        "type": "output",
        "description": "Channel 3 Darlington collector output (open collector); absolute maximum collector-emitter voltage 15 V and peak collector current 500 mA per channel."
      },
      {
        "number": "20",
        "name": "2C",
        "type": "output",
        "description": "Channel 2 Darlington collector output (open collector); absolute maximum collector-emitter voltage 15 V and peak collector current 500 mA per channel."
      },
      {
        "number": "21",
        "name": "1C",
        "type": "output",
        "description": "Channel 1 Darlington collector output (open collector); absolute maximum collector-emitter voltage 15 V and peak collector current 500 mA per channel."
      },
      {
        "number": "22",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection (empty pin per the pin description table)."
      },
      {
        "number": "23",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection (empty pin per the pin description table)."
      },
      {
        "number": "24",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection (empty pin per the pin description table)."
      }
    ],
    "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: Package label mismatch: the ordering table lists SSOP-24 (2500 pcs/reel), but the only package drawi; Pin 13 (COM) type is a judgment call: the datasheet describes it only as the clamp-diode common term; Input pull-down value is inconsistent in the datasheet: the overview says 4.7 kΩ, while the applicat"
        ],
        "pages_sent": 7,
        "cost_usd": 0.0481,
        "at": "2026-10-19T03:18:33"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603128890785349632",
        "pages": 7,
        "sha256": "86fae04a544f615b",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 24,
        "described": 24,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "uln2803.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.8,
          8.2,
          2.1
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "77dd0a1fc7e70e9eda1bfde9dde937dc6e391803cff9978790523c850c85a21d",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "uln2803-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.8,
          8.2,
          2.1
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "4bae3d68b3d68796212484584b69e486de0907b3a00650170dddbe42f45473bd",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}