ULN2065B Darlington Transistor Array from STMicroelectronics

The ULN2065B from STMicroelectronics is a high-voltage, high-current Darlington transistor array designed for interfacing between low-level logic circuitry and multiple peripheral power loads. This integrated circuit is ideal for driving a wide range of loads such as relays, solenoids, stepper motors, and other high-current or high-voltage devices in a variety of applications, including industrial controls, office machines, and consumer electronics.

Constructed with four NPN Darlington pairs, the ULN2065B can operate directly with TTL or 5V CMOS devices. Each channel is capable of withstanding up to 1.5A of continuous collector current, with peak current handling capabilities of up to 3A. This robust performance is complemented by the common-emitter configuration that allows for simplified design by sharing the emitter terminal across all four channels.

The ULN2065B is equipped with integral suppression diodes for inductive load transient protection, which are essential for managing the voltage spikes that occur when driving inductive loads. These diodes help to ensure the longevity and reliability of both the transistor array and the connected peripheral devices.

Key features of the ULN2065B include:

• Output current (single output) up to 1.5 A
• High-voltage outputs up to 50V
• Input compatible with popular logic types (TTL, 5V CMOS)
• Integral suppression diodes for inductive load
• Isolated Darlington pinout for ease of use
• Series diodes for logic side protection
• Versatility with multiple package options

Available in a 16-pin plastic DIP package, the ULN2065B offers a compact and convenient solution for driving multiple high-power loads with a single integrated device. Its reliable performance and built-in protection features make it a valuable component for any power driver application where efficiency and durability are critical.

STMicroelectronics' commitment to quality ensures that the ULN2065B meets the stringent requirements of the modern electronics industry, providing a reliable and cost-effective solution for high-current, high-voltage switching applications.