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ULN2003 driver (ULN2003A)

ICs & op-amps · 7 × 500 mA Darlington

ULN2003A · seven Darlington low-side switches · 2.7 kΩ input resistors (3.3 / 5 V logic) · 500 mA per output, 50 V · built-in flyback diodes to COM

ULN2003 driver (ULN2003A) on the simulator's bench

Try it on the benchThe lab drops it on an empty bench and opens its datasheet card.

Typical part: ULN2003A Darlington array

Pins

IN1
IN2
IN3
IN4
IN5
IN6
IN7
GND
COM (clamp diodes)
OUT7
OUT6
OUT5
OUT4
OUT3
OUT2
OUT1

Ratings and limits

Outputs	7 × 500 mA, 50 V
Input	3.3 / 5 V logic, 2.7 kΩ inside
Clamp diodes	to COM

How to use it

Drives relays, solenoids and unipolar steppers from microcontroller pins. Tie COM to the load supply so the built-in diodes catch the flyback.

Lessons and builds that use it

ULN2003 driver array for a stepper

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