ULN2803A – STMicroelectronics

Part Number:

ULN2803A

Manufacturer:

STMicroelectronics

Date Code:

RoHS:

RoHS Compliant

MSL:

COO:

MALAYSIA

Description:

BJT Transistor Array, 8 NPN Darlington, 50V, 500mA, 2.25W, 18-DIP

Datasheet:

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Product Details:

Overview

The ULN2803A is an eight NPN Darlington transistor array manufactured by STMicroelectronics. This device is designed for interfacing between logic-level signals and higher current or voltage loads. Each channel within the array is rated for 50V and 500mA, with a total power dissipation of 2.25W. It is supplied in an 18-pin DIP package.

Key Features

Eight NPN Darlington pairs
50V output voltage rating
500mA output current per channel
Integrated suppression diodes for inductive loads
DIP-18 package

Applications

This transistor array is commonly used in applications requiring multiple switching functions controlled by logic signals. The integrated diodes provide protection when driving inductive components. Typical deployments include:

Relay drivers
Stepper motor control
Lamp drivers
LED display drivers