ULN2803A - STMicroelectronics

Manufacturer Part Number

ULN2803A

Manufacturer

STMicroelectronics

Introduction

High-voltage, high-current Darlington transistor array

Designed to interface between low-level logic circuitry and high-power loads

Product Features and Performance

8 Darlington-connected NPN transistors

Capable of driving inductive loads such as relays, solenoids, and stepper motors

High-voltage outputs up to 50V

High-current output up to 500mA per driver

Low saturation voltage of 1.6V at 500mA

Wide operating temperature range of -20°C to 150°C

Product Advantages

Compact 18-pin DIP package

Suitable for driving a variety of high-power loads

Provides high-current output while requiring minimal input current

Protects against back-EMF from inductive loads

Key Technical Parameters

Collector-Emitter Breakdown Voltage (max): 50V

Collector Current (max): 500mA

Saturation Voltage @ 500mA, 350mA: 1.6V

DC Current Gain (min) @ 350mA, 2V: 1000

Quality and Safety Features

RoHS3 compliant

Designed for reliable, long-term operation

Compatibility

Compatible with various low-level logic circuits, such as TTL and CMOS

Application Areas

Driving high-power loads in industrial, automotive, and consumer electronics applications

Controlling motors, relays, solenoids, lamps, and other inductive loads

Product Lifecycle

Mature product, widely available and supported

Replacement/upgrade options may be available from STMicroelectronics or other manufacturers

Key Reasons to Choose This Product

High-performance Darlington transistor array with excellent current and voltage capabilities

Compact and efficient design, suitable for space-constrained applications

Reliable and long-lasting operation, with protection against inductive load switching

Widely compatible with a variety of low-level logic circuits