Overview
The ULN2001A is a high-voltage, high-current Darlington transistor array produced by STMicroelectronics. This device contains seven open collector Darlington pairs with common emitters, each rated at 500 mA and capable of withstanding peak currents of 600 mA. The ULN2001A is designed to interface with all common logic families, including DTL, TTL, PMOS, and CMOS, making it versatile for various applications. It features integrated suppression diodes for inductive load driving and has inputs pinned opposite the outputs to simplify board layout. The device is available in 16-pin DIP and SO-16 packages, both of which include a copper leadframe to reduce thermal resistance.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Current per Driver | 500 mA (600 mA peak) | A |
| Output Voltage | 50 V | V |
| Input Voltage Compatibility | TTL, CMOS, PMOS, DTL | - |
| Continuous Collector Current | 500 mA | A |
| Continuous Base Current | 25 mA | A |
| Operating Ambient Temperature Range | -20 to 85 °C | °C |
| Storage Temperature Range | -55 to 150 °C | °C |
| Junction Temperature | 150 °C | °C |
| Package Types | 16-pin DIP, SO-16 | - |
Key Features
- Seven Darlington transistors per package
- Output current of 500 mA per driver (600 mA peak)
- Output voltage of 50 V
- Integrated suppression diodes for inductive loads
- Outputs can be paralleled for higher current
- TTL/CMOS/PMOS/DTL compatible inputs
- Input pins placed opposite to output pins to simplify board layout
Applications
- Solenoids
- Relay DC motors
- LED display filament lamps
- Thermal printheads
- High-power buffers
Q & A
- What is the ULN2001A?
The ULN2001A is a high-voltage, high-current Darlington transistor array containing seven open collector Darlington pairs with common emitters. - What are the output current and voltage specifications of the ULN2001A?
The output current is 500 mA per driver with a peak of 600 mA, and the output voltage is 50 V. - Which logic families is the ULN2001A compatible with?
The ULN2001A is compatible with TTL, CMOS, PMOS, and DTL logic families. - What type of packages is the ULN2001A available in?
The ULN2001A is available in 16-pin DIP and SO-16 packages. - Why are suppression diodes included in the ULN2001A?
Suppression diodes are included for inductive load driving. - Can the outputs of the ULN2001A be paralleled?
Yes, the outputs can be paralleled to achieve higher current. - What is the operating temperature range of the ULN2001A?
The operating ambient temperature range is -20 to 85 °C. - What are some common applications of the ULN2001A?
Common applications include driving solenoids, relay DC motors, LED display filament lamps, thermal printheads, and high-power buffers. - How does the ULN2001A simplify board layout?
The inputs are pinned opposite the outputs to simplify board layout. - What is the junction temperature of the ULN2001A?
The junction temperature is 150 °C.
