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.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownULN2803QN
BORN · Darlington Transistor Arrays · QFN4x4-20L
ULN2803QN from BORN, in a QFN4x4-20L. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | 3B | input | Base input of Darlington pair 3; input voltage is limited to -0.5 V to 30 V per the absolute maximum ratings. |
| 2 | 4B | input | Base input of Darlington pair 4; input voltage is limited to -0.5 V to 30 V per the absolute maximum ratings. |
| 3 | 5B | input | Base input of Darlington pair 5; input voltage is limited to -0.5 V to 30 V per the absolute maximum ratings. |
| 4 | 6B | input | Base input of Darlington pair 6; input voltage is limited to -0.5 V to 30 V per the absolute maximum ratings. |
| 5 | 7B | input | Base input of Darlington pair 7; input voltage is limited to -0.5 V to 30 V per the absolute maximum ratings. |
| 6 | 8B | input | Base input of Darlington pair 8; input voltage is limited to -0.5 V to 30 V per the absolute maximum ratings. |
| 7 | NC | unconnected | No internal connection. |
| 8 | E | power_in | Common emitter (CE, ground) for all seven Darlington pairs; total emitter-terminal current is limited to -2.5 A. |
| 9 | COM | power_in | Common clamp diodes (CC Diodes) for inductive-load suppression; the COM pin voltage is rated up to 50 V. |
| 10 | 8C | output | Open-collector output of Darlington pair 8; rated 500 mA per channel with collector-emitter voltage up to 50 V. |
| 11 | 7C | output | Open-collector output of Darlington pair 7; rated 500 mA per channel with collector-emitter voltage up to 50 V. |
| 12 | 6C | output | Open-collector output of Darlington pair 6; rated 500 mA per channel with collector-emitter voltage up to 50 V. |
| 13 | 5C | output | Open-collector output of Darlington pair 5; rated 500 mA per channel with collector-emitter voltage up to 50 V. |
| 14 | 4C | output | Open-collector output of Darlington pair 4; rated 500 mA per channel with collector-emitter voltage up to 50 V. |
| 15 | 3C | output | Open-collector output of Darlington pair 3; rated 500 mA per channel with collector-emitter voltage up to 50 V. |
| 16 | 2C | output | Open-collector output of Darlington pair 2; rated 500 mA per channel with collector-emitter voltage up to 50 V. |
| 17 | 1C | output | Open-collector output of Darlington pair 1; rated 500 mA per channel with collector-emitter voltage up to 50 V. |
| 18 | NC | unconnected | No internal connection. |
| 19 | 1B | input | Base input of Darlington pair 1; input voltage is limited to -0.5 V to 30 V per the absolute maximum ratings. |
| 20 | 2B | input | Base input of Darlington pair 2; input voltage is limited to -0.5 V to 30 V per the absolute maximum ratings. |
| 21 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | BORN |
| Package | QFN4x4-20L |
| Category | Transistors/Thyristors |
| Pins | 21 |
CAD (KiCad official)
- Symbol:
ULN2803QN - Footprint:
Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm - 3D model: QFN4x4-20L (KiCad packages3D, STEP)
- 3D model files:
uln2803qn-etched.step/uln2803qn-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);uln2803qn.step/uln2803qn.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: BORN datasheet (7 pp, sha256
c60060c0f7c75dc5, retrieved 2026-10-09, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).