ULN2803 8 Channel Darlington Driver (Solenoid/Unipolar Stepper) - ULN2803A

Bring in some muscle to your output pins with 8 mighty Darlingtons! This DIP chip contains 8 drivers that can sink 500mA from a 50V supply and has kickback diodes included inside for driving coils. This will let your little microcontroller or microcomputer power solenoids, DC motors (in one direction), and unipolar stepper motors.

Please Note: This is an 'open collector' driver - it can only be used to connect the load to ground and there will be a 1 Volt (or more) 'drop' across the internal transistors. The inputs can be driven by 3.3V or 5V logic. Fits nicely in any breadboard or perfboard.

Important: Your chip may have a part marking of ULQ2803A, this is the extended temperature range version of the ULN2803A, so it can run from -40 to 105 °C. It is otherwise identical in pinout, usage, voltage, and current capabilities.

• 8 Darlington driver channels
• Current sink capability: 500mA per channel
• Voltage rating: up to 50V supply
• Built-in kickback diodes for driving coils
• Compatible with 3.3V or 5V logic inputs
• Open collector output, for switching to ground only
• DIP form factor, suitable for breadboard and perfboard
• Extended temperature range version available (ULQ2803A)