The ULN2001D from STMicroelectronics is a high-voltage, high-current Darlington transistor array designed to interface between low-level logic circuitry and multiple peripheral power loads. This integrated circuit is part of the ULN200x series, which are renowned for their utility in driving a wide array of loads such as relays, solenoids, and stepper motors in various applications ranging from automotive to industrial control systems.

Key Features

• Seven Darlington Arrays: The device contains seven open-collector Darlington pairs, each capable of sinking 500mA. This makes it suitable for driving a variety of high-current loads.
• High-Voltage Outputs: With an output voltage of 50V, it can easily handle the demands of most medium-power applications.
• Output Clamp Diodes: Each output includes an integral clamp diode for inductive load transient suppression, protecting your circuit from voltage spikes.
• Inputs Compatible with Various Types of Logic: The ULN2001D is compatible with TTL, 5V CMOS, and PMOS logic, providing flexibility in interfacing with different control systems.
• Low Input Current: The device requires minimal input current, allowing direct interfacing with microcontrollers and other logic-level devices without the need for buffer or driver circuits.

Applications

The ULN2001D is versatile and can be used in a wide array of applications including:

• Relay Drivers
• Stepper Motor Control
• LED Displays & Matrixes
• Logic Buffers
• Line Drivers
• Industrial Controls

Package and Quality

The ULN2001D comes in a standard 16-pin DIP (Dual In-line Package) or SO (Small Outline) package, making it suitable for through-hole or surface-mounted PCB designs. The product adheres to STMicroelectronics' commitment to quality and reliability, ensuring consistent performance for industrial and consumer applications.

With its robust design and versatile functionality, the STMicroelectronics ULN2001D is an excellent choice for designers looking to create reliable and efficient interfaces between their digital logic and high-power peripheral loads.