ULN2803AN – TEXAS INSTRUMENTS

Part Number:

ULN2803AN

Manufacturer:

TEXAS INSTRUMENTS

Date Code:

RoHS:

RoHS Compliant

MSL:

COO:

Description:

Darlington Transistor Array, PDIP-18 Package

Datasheet:

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Stock Quantity: 29

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29 in stock

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Product Details:

Overview

The TEXAS INSTRUMENTS ULN2803AN is an 8-channel NPN Darlington transistor array designed for driving high-current loads from low-current logic signals. Its primary function is to amplify digital outputs to levels capable of switching relays, solenoids, or incandescent lamps. A critical design consideration when employing this device is managing the significant saturation voltage (Vce(sat) ≈ 1.6V at 350mA), which can impact power efficiency and necessitate careful thermal management, especially in applications pushing its 500mA per channel current limit. This robust array offers a straightforward interface between microcontrollers and electromechanical actuators.

Key Features

8 Independent NPN Darlington Outputs
500mA Maximum Collector Current per Channel
50V Collector-Emitter Breakdown Voltage
Low Input Current Requirement
1.6V Maximum Vce(sat) @ 350mA
18-DIP (0.300″) Through-Hole Package

Applications

The component is engineered for deployment in systems requiring high reliability and performance under specific operating conditions. It provides functional stability across the stated design envelope.

Driving multiple incandescent indicator lamps from a microcontroller
Actuating electromechanical relays for power switching
Controlling solenoids in automated machinery
Interfacing with stepper motor driver circuits