component

ULN2803CDWR

Public Made by Adom

by adom

Texas Instruments Bipolar (BJT), SOIC-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Contents

README

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ULN2803CDWR

Texas Instruments · Bipolar (BJT) · SOIC-20-300mil

ULN2803CDWR from Texas Instruments, in a SOIC-20-300mil. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 1B input Channel 1 Darlington base input, 2.7-kΩ internal series resistor, TTL/5-V CMOS compatible, 30-V absolute maximum.
2 2B input Channel 2 Darlington base input, 2.7-kΩ internal series resistor, TTL/5-V CMOS compatible, 30-V absolute maximum.
3 3B input Channel 3 Darlington base input, 2.7-kΩ internal series resistor, TTL/5-V CMOS compatible, 30-V absolute maximum.
4 4B input Channel 4 Darlington base input, 2.7-kΩ internal series resistor, TTL/5-V CMOS compatible, 30-V absolute maximum.
5 5B input Channel 5 Darlington base input, 2.7-kΩ internal series resistor, TTL/5-V CMOS compatible, 30-V absolute maximum.
6 6B input Channel 6 Darlington base input, 2.7-kΩ internal series resistor, TTL/5-V CMOS compatible, 30-V absolute maximum.
7 7B input Channel 7 Darlington base input, 2.7-kΩ internal series resistor, TTL/5-V CMOS compatible, 30-V absolute maximum.
8 8B input Channel 8 Darlington base input, 2.7-kΩ internal series resistor, TTL/5-V CMOS compatible, 30-V absolute maximum.
9 GND power_in Common emitter shared by all channels (typically tied to ground).
10 NC unconnected No connect pin.
11 NC unconnected No connect pin.
12 COM bidirectional Common cathode node for flyback diodes (required for inductive loads).
13 8C output Channel 8 Darlington collector output, 500-mA maximum rated collector current, 50-V maximum collector-emitter voltage, open-collector with internal clamp diode.
14 7C output Channel 7 Darlington collector output, 500-mA maximum rated collector current, 50-V maximum collector-emitter voltage, open-collector with internal clamp diode.
15 6C output Channel 6 Darlington collector output, 500-mA maximum rated collector current, 50-V maximum collector-emitter voltage, open-collector with internal clamp diode.
16 5C output Channel 5 Darlington collector output, 500-mA maximum rated collector current, 50-V maximum collector-emitter voltage, open-collector with internal clamp diode.
17 4C output Channel 4 Darlington collector output, 500-mA maximum rated collector current, 50-V maximum collector-emitter voltage, open-collector with internal clamp diode.
18 3C output Channel 3 Darlington collector output, 500-mA maximum rated collector current, 50-V maximum collector-emitter voltage, open-collector with internal clamp diode.
19 2C output Channel 2 Darlington collector output, 500-mA maximum rated collector current, 50-V maximum collector-emitter voltage, open-collector with internal clamp diode.
20 1C output Channel 1 Darlington collector output, 500-mA maximum rated collector current, 50-V maximum collector-emitter voltage, open-collector with internal clamp diode.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOIC-20-300mil
Category Transistors/Thyristors
Pins 20

CAD (KiCad official)

  • Symbol: ULN2803CDWR
  • Footprint: Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm
  • 3D model: SOIC-20-300mil (KiCad packages3D, STEP)
  • 3D model files: uln2803cdwr-etched.step / uln2803cdwr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); uln2803cdwr.step / uln2803cdwr.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (22 pp, sha256 d84ec05d96baf6bc, retrieved 2026-09-22, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-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).

Datasheet PDF