The ULN2805A 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 ideal for driving a wide array of loads such as relays, solenoids, stepper motors, and other high-current or high-voltage devices in a variety of industrial, consumer, and computing applications.
Key Features
- High Voltage Outputs: The ULN2805A can handle output voltages up to 50V, making it suitable for interfacing with a wide range of high voltage applications.
- High Current Capability: With an output current of 500mA per channel, and a peak current of 600mA, this array can drive many high-power components.
- Eight Darlington Pairs: Each IC contains eight Darlington pairs with common emitter and open-collector outputs, providing ample channels for multiple device control.
- Input Compatible with Various Types of Logic: The inputs are compatible with popular logic levels, allowing for direct interfacing with TTL, 5V CMOS, and other standard logic families.
- Integrated Suppression Diodes: Built-in diodes for back EMF suppression are provided for inductive loads, enhancing the reliability of the circuitry.
- Output Clamp Diodes: Clamp diodes are included for switching inductive loads and to handle transient voltage spikes.
Applications
The versatility of the ULN2805A makes it an excellent choice for a variety of applications, including:
- Relay Drivers
- Stepper Motor Controllers
- LED Displays / LED Matrix Drivers
- Line Drivers
- Logic Buffers
Technical Specifications
Parameter
Value
Output Voltage (max)
50V
Output Current (per channel)
500mA
Peak Output Current
600mA
Input Voltage
5V
Number of Channels
8
Whether you're designing a complex industrial system or a simple DIY project, the ULN2805A provides the power and reliability needed to drive your high-current loads with ease. Trust STMicroelectronics for quality components that enhance the performance and durability of your electronic designs.
