ULN2068B – STMicroelectronics

The STMicroelectronics ULN2068B is a high-voltage, high-current Darlington transistor array specifically designed for driving inductive loads such as relays, solenoids, and DC motors. This monolithic device comprises eight NPN Darlington pairs, each capable of sinking up to 500mA with a guaranteed output voltage rating of 50V. The ULN2068B features integrated suppression diodes for protection against back-EMF generated by inductive loads, simplifying circuit design and reducing the need for external components. Packaged in a 18-pin DIP (through-hole) format, it offers easy integration into breadboards and prototyping environments. Its operating temperature range spans –20°C to 85°C, making it suitable for a wide range of industrial and consumer applications. The ULN2068B provides a cost-effective solution for interface between low-level logic circuits and higher-power actuators, improving system reliability and reducing board space.