1 Features

• 500-mA-rated collector current

(single output)

• High-voltage outputs: 50 V

• Output clamp diodes

• Inputs compatible with various types of logic

2 Applications

• Factory automation and control

• Building automation

• Appliances

• IP network camera

• HVAC valve & actuator control

• Relay, solenoid, and lamp driving

• Stepper motor driving

3 Description

The ULN2803C device is a 50-V, 500-mA Darlington

transistor array. The device consists of eight NPN

Darlington pairs that feature high-voltage outputs with

common-cathode clamp diodes for switching inductive

loads. The collector-current rating of each Darlington

pair is 500 mA. The Darlington pairscan be connected

in parallel for higher current capability.

Applications include relay drivers, hammer drivers,

lamp drivers, display drivers (LED and gas discharge),

line drivers, and logic buffers. The ULN2803C device

has a 2.7-kΩ series base resistor for each Darlington

pair for operation directly with TTL or 5-V CMOS

devices.