The ULN2803G-D18-T is a high-voltage, high-current Darlington transistor array from UTC (Unisonic Technologies Co., Ltd.). It is designed for interfacing between low-level logic circuits and higher voltage/current loads. This device contains eight NPN Darlington transistors with common emitters.

Applications:

• Relay drivers
• Solenoid drivers
• Lamp drivers
• Stepper motor drivers
• Logic buffers

Features:

• Eight Darlington Transistors: Contains eight independent Darlington transistor arrays.
• High Voltage Output: Can drive loads up to 50V.
• High Current Output: Each channel can handle up to 500mA.
• Integrated Suppression Diodes: Includes internal suppression diodes for inductive loads.
• TTL/CMOS Compatible Inputs: Directly interfaces with TTL and CMOS logic circuits.
• DIP-18 Package: Through-hole package.
• Lead-Free Finish: Compliant with RoHS standards.

Benefits:

• Simplified Interfacing: Simplifies interfacing between low-level logic and high-power loads.
• Protection: Internal suppression diodes protect the driving circuitry from voltage spikes.
• High Current Capability: Capable of driving a wide range of loads.
• Space Saving: Eight drivers in a single package reduce board space requirements.
• Reliable: Robust design ensures reliable operation in a variety of applications.

Additional Details:

The ULN2803G-D18-T provides a convenient and reliable way to drive relays, solenoids, lamps, and other high-power loads from logic-level signals. The integrated suppression diodes eliminate the need for external flyback diodes, simplifying circuit design and reducing component count. The device is compatible with a wide range of logic families, including TTL and CMOS. Each channel is capable of sinking up to 500mA of current, making it suitable for driving a variety of loads. The ULN2803 is designed for general purpose amplifier or switch applications. The device's DIP-18 package allows for easy mounting on through-hole printed circuit boards.