The ULN2003 Darlington Transistor Array is a versatile 7‑channel driver IC designed for interfacing low‑level logic circuits with high‑current/high‑voltage loads. Each channel consists of a Darlington pair transistor capable of driving relays, stepper motors, lamps, solenoids, and LED displays.

Widely used in Arduino, microcontroller, and embedded system projects, the ULN2003 provides easy interfacing, built‑in protection diodes, and reliable performance.

Specifications

• IC Type: Darlington transistor array

• Channels: 7 (independent outputs)

• Package: DIP‑16

• Input Voltage: TTL/CMOS compatible (5V logic)

• Output Voltage: Up to 50V

• Output Current: Up to 500mA per channel

• Protection: Built‑in clamp diodes for inductive loads

• Applications: Relay driving, stepper motor control, LED displays, solenoids, industrial automation

Features

• 7 high‑current drivers in one IC

• Darlington pair configuration for high gain

• Built‑in flyback diodes for inductive load protection

• Compact DIP‑16 package for easy prototyping

• Compatible with Arduino and microcontrollers

• Ideal for motors, relays, lamps, and LED arrays

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