ULN2068 Quad High-Voltage High-Current Darlington Switch Array (DIP-16)

The ULN2068 is a monolithic, high-voltage, high-current quad Darlington switch array designed to interface low-level logic to a wide variety of peripheral loads. Each of the four independent NPN Darlington switches is capable of delivering up to 1.5A of continuous current, making it ideal for driving high-power components such as relays, solenoids, DC motors, and stepping motors. The device includes integrated freewheeling clamp diodes to protect against transient voltages when switching inductive loads. Additionally, the ULN2068 features an internal pre-driver stage that significantly reduces the input current required from the controlling logic, allowing it to be driven directly by standard 5V microcontrollers. Its robust 16-pin DIP package with specialized heat-conducting tabs ensures reliable thermal performance in demanding industrial and automotive applications.

Key Features:

High-voltage operation with a specified minimum breakdown of 50V.

Compatible with popular 5V logic families including TTL, DTL, and CMOS.

Built-in integral suppression diodes for safe switching of inductive loads.

Features a pre-driver stage to minimize loading on the control logic.

Copper alloy lead frame and heat sink contact tabs for increased power dissipation.