Part Number: ULN2003
Function : HIGH-VOLTAGE/ HIGH-CURRENT DARLINGTON ARRAYS
Package: DIP 16 Pin, SOP 16 Pin
Manufacturer: Allegro MicroSystems
Ideally suited for interfacing between low-level logic circuitry and multiple peripheral power loads, the Series ULN20xxA/L high-voltage, high-current Darlington arrays feature continuous load current ratings to 500 mA for each of the seven drivers.
The ULN2003 is a popular high-voltage and high-current Darlington transistor array. It consists of seven NPN Darlington pairs that are capable of driving loads up to 50V and 500mA per channel. The ULN2003 is commonly used for interfacing between TTL or CMOS logic circuits and high-power loads, such as relays, solenoids, motors, and lamps.
The ULN2003 features built-in protection diodes that are connected across each Darlington pair. These diodes provide protection against inductive flyback voltage spikes that can occur when the load is switched off.
At an appropriate duty cycle depending on ambient temperature and number of drivers turned ON simultaneously, typical power loads totaling over 230 W (350 mA x 7, 95 V) can be controlled. 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. The ULN2003A/L and ULN2023A/L have series input resistors selected for operation directly with 5 V TTL or CMOS. These devices will handle numerous interface needs — particularly those beyond the capabilities of standard logic buffers.
1. TTL, DTL, PMOS, or CMOS-Compatible Inputs
2. Output Current to 500 mA
3. Output Voltage to 95 V
4. Transient-Protected Outputs
5. Dual In-Line Plastic Package or Small-Outline IC Package