Overview
The ULN2003A, produced by STMicroelectronics, is a high-voltage, high-current Darlington transistor array. This device contains seven Darlington pairs with common emitters, each capable of sinking up to 500 mA of current and withstanding peak currents of 600 mA. It is designed to interface with various logic families, specifically 5 V TTL and CMOS systems. The ULN2003A is versatile and widely used in driving a variety of loads such as solenoids, relays, DC motors, LED displays, filament lamps, thermal printheads, and high-power buffers. The device is available in several package types, including 16-pin DIP, SO-16, and TSSOP-16, making it suitable for different design requirements.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Darlington Pairs | 7 | - |
| Output Current per Driver | 500 mA | - |
| Peak Output Current | 600 mA | - |
| Output Voltage | 50 V | - |
| Input Voltage Compatibility | 5 V TTL, CMOS | - |
| Operating Ambient Temperature Range | -40°C to 85°C | °C |
| Storage Temperature Range | -55°C to 150°C | °C |
| Junction Temperature | 150°C | °C |
| Package Types | 16-pin DIP, SO-16, TSSOP-16 | - |
Key Features
- Seven Darlington pairs per package with common emitters.
- Output current of 500 mA per driver, with peak currents up to 600 mA.
- Output voltage rating of 50 V.
- Integrated suppression diodes for inductive load driving.
- Outputs can be paralleled for higher current.
- TTL/CMOS/PMOS/DTL compatible inputs.
- Input pins placed opposite to output pins to simplify board layout.
- Series base resistor in each Darlington pair for direct operation with TTL or CMOS logic.
Applications
The ULN2003A is versatile and useful in a wide range of applications, including:
- Driving solenoids and relays.
- Controlling DC motors and small motors.
- Operating LED displays and filament lamps.
- Driving thermal printheads.
- High-power buffer applications.
- Industrial automation and control systems.
Q & A
- What is the ULN2003A?
The ULN2003A is a high-voltage, high-current Darlington transistor array produced by STMicroelectronics.
- How many Darlington pairs does the ULN2003A contain?
The ULN2003A contains seven Darlington pairs with common emitters.
- What is the output current rating of each Darlington pair?
Each Darlington pair is rated at 500 mA with peak currents up to 600 mA.
- What is the maximum output voltage of the ULN2003A?
The maximum output voltage is 50 V.
- Is the ULN2003A compatible with TTL and CMOS logic?
- What types of loads can the ULN2003A drive?
The ULN2003A can drive solenoids, relays, DC motors, LED displays, filament lamps, thermal printheads, and high-power buffers.
- What are the package options for the ULN2003A?
The ULN2003A is available in 16-pin DIP, SO-16, and TSSOP-16 packages.
- What is the operating temperature range of the ULN2003A?
The operating ambient temperature range is -40°C to 85°C.
- Does the ULN2003A have built-in suppression diodes?
- Can the outputs of the ULN2003A be paralleled for higher current?
