Overview
The ULN2003APW is a high-voltage, high-current Darlington transistor array produced by Texas Instruments. This device is part of the ULN2003A series and is known for its ubiquity and versatility across a wide range of applications. It consists of seven NPN Darlington transistor pairs, each capable of sinking up to 500 mA of current. The device features a common emitter and open collector outputs, making it suitable for driving various types of loads including solenoids, relays, lamps, small motors, and LEDs. The ULN2003APW is designed to operate directly with TTL or CMOS logic at supply voltages of 5 V or 3.3 V, thanks to the integrated 2.7 kΩ series base resistor for each Darlington pair.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Collector Current (single output) | 500 | mA |
| High-Voltage Outputs | 50 | V |
| Operating Temperature Range | -40 to 70 | °C |
| Package Type | TSSOP-16 | |
| Propagation Delay Time (low- to high-level output) | 1 - 10 | μs |
| Propagation Delay Time (high- to low-level output) | 1 - 10 | μs |
Key Features
- High-voltage outputs: 50V
- 500mA-rated collector current (single output)
- Output clamp diodes for inductive load protection
- Inputs compatible with various types of logic (TTL, CMOS)
- Integrated 2.7 kΩ series base resistor for each Darlington pair
- Common emitter and open collector outputs
Applications
- Relay drivers
- Hammer drivers
- Lamp drivers
- Display drivers (LED and gas discharge)
- Line drivers
- Logic buffers
- Solenoids, small motors, and other inductive loads
Q & A
- What is the ULN2003APW used for?
The ULN2003APW is used for driving high-current and high-voltage loads such as relays, solenoids, lamps, and small motors.
- What is the maximum collector current of the ULN2003APW?
The maximum collector current of the ULN2003APW is 500 mA per output.
- What is the operating temperature range of the ULN2003APW?
The operating temperature range of the ULN2003APW is -40°C to 70°C.
- What type of logic is the ULN2003APW compatible with?
The ULN2003APW is compatible with TTL and CMOS logic.
- What is the purpose of the output clamp diodes in the ULN2003APW?
The output clamp diodes are used to suppress the kick-back voltage from inductive loads.
- How many Darlington transistor pairs are in the ULN2003APW?
The ULN2003APW contains seven NPN Darlington transistor pairs.
- What is the package type of the ULN2003APW?
The ULN2003APW is packaged in a TSSOP-16 package.
- Can the ULN2003APW drive resistive loads?
- What is the propagation delay time of the ULN2003APW?
The propagation delay time of the ULN2003APW is between 1 μs and 10 μs for both low-to-high and high-to-low transitions.
- Can the Darlington pairs in the ULN2003APW be paralleled for higher current capability?
