ULN2003 Darlington Array IC

Description

The ULN2003 is a popular Darlington IC, it has seven Darlington pairs inside each pair with 1 input and 1 output pin. Thus having 7 input and 7 output pins. Each pair is rated for 50V and 500mA and the input pins can be triggered by +5V.

The ULN2003 IC is commonly used to drive large loads with microcontrollers. Like Driving a High-Power LED array or Driving a motor in both directions or controlling a Stepper motor etc.

The ULN2003 have series input resistors selected for operation directly with 5V TTL or CMOS.  These devices will handle numerous interface needs — particularly those beyond the capabilities of standard logic buffers. It is ideally suited for interfacing between low-level logic circuitry and multiple peripheral power loads, Typical loads include relays, solenoids, stepping motors, magnetic print hammers, multiplexed LED and incandescent displays, and heaters.  All devices feature open-collector outputs with integral clamp diodes.

ULN2003 pinout:

ULN2003 Specification

Specifications: 

• Suitable for low – level logic circuit and multiple peripheral power loads.
• TTL, DTL, PMOS, or CMOS-Compatible Inputs
• Output Current to 500 mA
• Output Voltage to 95 V
• Transient-Protected Outputs
• Dual In-Line Plastic Package or Small-Outline IC Package

ULN2003 Applications:

• Relay Driver
• Line Driver
• Logic Buffers
• Lamp Drivers
• Display Drivers (LED and Gas Discharge)

ULN2003 Dimension and footprint: