ULN2803A UMW

Darlington Transistor Array ULN2803A

ULN2803A (Micros part number: ULN2803adw UMW) is a multi-channel, high-current and high-voltage integrated circuit consisting of eight NPN Darlington transistor pairs. It is a replacement for the discontinued Texas Instruments device. It is used as a driver for switching inductive loads such as relays, stepper motors, or lamps directly from 5V logic circuits, including TTL and 5V CMOS.

Key Features and Capabilities of the ULN2803A

• Type: Driver, Darlington transistor array
• Number of channels: 8
• Maximum collector current: 500 mA (per channel)
• Maximum output voltage: 50V
• Package: SMD, SOIC-18
• Operating temperature range: From -40°C to 125°C
• Manufacturer: UMW
• Additional features: Built-in clamp diodes for inductive loads, compatible with 5V TTL/CMOS logic

Typical Applications of the ULN2803A

This integrated circuit is designed for use in:

• Relay control – direct switching of relay coils;
• Motor control – controlling stepper motors and small DC motors;
• Display control – switching segments in LED and gas displays;
• Lamp driving – turning on and off bulbs and other light sources;
• Logic buffering – amplifying logic signals to drive higher currents.

We encourage you to explore the full range of drivers and other components available at Micros. If you have any questions, please feel free to contact us.