component
ULN2803QN
Public Made by Adomby adom
BORN Darlington Transistor Arrays, QFN4x4-20L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"description": "BORN Darlington Transistor Arrays, QFN4x4-20L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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"component": {
"mpn": "ULN2803QN",
"manufacturer": "BORN",
"package": "QFN4x4-20L",
"pin_count": 21,
"category": "Transistors/Thyristors",
"subcategory": "Darlington Transistor Arrays",
"datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590909068406312960",
"parts": {
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"checked_at": "2026-10-09T18:16:03Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "no match"
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"mouser": {
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"pins": [
{
"number": "1",
"name": "3B",
"type": "input",
"description": "Base input of Darlington pair 3; input voltage is limited to -0.5 V to 30 V per the absolute maximum ratings."
},
{
"number": "2",
"name": "4B",
"type": "input",
"description": "Base input of Darlington pair 4; input voltage is limited to -0.5 V to 30 V per the absolute maximum ratings."
},
{
"number": "3",
"name": "5B",
"type": "input",
"description": "Base input of Darlington pair 5; input voltage is limited to -0.5 V to 30 V per the absolute maximum ratings."
},
{
"number": "4",
"name": "6B",
"type": "input",
"description": "Base input of Darlington pair 6; input voltage is limited to -0.5 V to 30 V per the absolute maximum ratings."
},
{
"number": "5",
"name": "7B",
"type": "input",
"description": "Base input of Darlington pair 7; input voltage is limited to -0.5 V to 30 V per the absolute maximum ratings."
},
{
"number": "6",
"name": "8B",
"type": "input",
"description": "Base input of Darlington pair 8; input voltage is limited to -0.5 V to 30 V per the absolute maximum ratings."
},
{
"number": "7",
"name": "NC",
"type": "unconnected",
"description": "No internal connection."
},
{
"number": "8",
"name": "E",
"type": "power_in",
"description": "Common emitter (CE, ground) for all seven Darlington pairs; total emitter-terminal current is limited to -2.5 A."
},
{
"number": "9",
"name": "COM",
"type": "power_in",
"description": "Common clamp diodes (CC Diodes) for inductive-load suppression; the COM pin voltage is rated up to 50 V."
},
{
"number": "10",
"name": "8C",
"type": "output",
"description": "Open-collector output of Darlington pair 8; rated 500 mA per channel with collector-emitter voltage up to 50 V."
},
{
"number": "11",
"name": "7C",
"type": "output",
"description": "Open-collector output of Darlington pair 7; rated 500 mA per channel with collector-emitter voltage up to 50 V."
},
{
"number": "12",
"name": "6C",
"type": "output",
"description": "Open-collector output of Darlington pair 6; rated 500 mA per channel with collector-emitter voltage up to 50 V."
},
{
"number": "13",
"name": "5C",
"type": "output",
"description": "Open-collector output of Darlington pair 5; rated 500 mA per channel with collector-emitter voltage up to 50 V."
},
{
"number": "14",
"name": "4C",
"type": "output",
"description": "Open-collector output of Darlington pair 4; rated 500 mA per channel with collector-emitter voltage up to 50 V."
},
{
"number": "15",
"name": "3C",
"type": "output",
"description": "Open-collector output of Darlington pair 3; rated 500 mA per channel with collector-emitter voltage up to 50 V."
},
{
"number": "16",
"name": "2C",
"type": "output",
"description": "Open-collector output of Darlington pair 2; rated 500 mA per channel with collector-emitter voltage up to 50 V."
},
{
"number": "17",
"name": "1C",
"type": "output",
"description": "Open-collector output of Darlington pair 1; rated 500 mA per channel with collector-emitter voltage up to 50 V."
},
{
"number": "18",
"name": "NC",
"type": "unconnected",
"description": "No internal connection."
},
{
"number": "19",
"name": "1B",
"type": "input",
"description": "Base input of Darlington pair 1; input voltage is limited to -0.5 V to 30 V per the absolute maximum ratings."
},
{
"number": "20",
"name": "2B",
"type": "input",
"description": "Base input of Darlington pair 2; input voltage is limited to -0.5 V to 30 V per the absolute maximum ratings."
},
{
"number": "21",
"name": "EP",
"type": "passive",
"description": "Exposed pad (from the footprint; not named in the datasheet pin 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: The datasheet pin table (page 2) lists 20 pins for the QFN4X4-20L package, matching the requested pa; Pin 9 is named COM, described in the table as 'CC Diodes = Common Clamp Diodes'. The datasheet does ; The pin table and block diagram do not describe a thermal/exposed pad on the QFN4X4-20L package. Non",
"exposed pad 21 added from the footprint"
],
"pages_sent": 7,
"cost_usd": 0.0478,
"at": "2026-10-09T18:13:08"
},
"datasheet": {
"url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590909068406312960",
"pages": 7,
"sha256": "c60060c0f7c75dc5",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 21,
"described": 21,
"cites_pages": true,
"refuses_to_fabricate": true
}
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