Datasheet

ULN2003LV
IN3
IN4
OUT1
OUT2
OUT3
OUT4
IN5
IN6
IN7
GND
OUT5
OUT6
OUT7
COM
IN1
IN2
Motor Supply(Up to 8V)
Motor Control Pulses
(3V to 5V)
Phase_C
Phase_B
Phase_D
Motor
VSUP
Phase_A
VSUP
ULN2003LV
www.ti.com SLRS059A –APRIL 2012–REVISED APRIL 2012
Unipolar Stepper Motor Driver
The Figure 7 shows an implementation of ULN2003LV for driving a uniploar stepper motor. The unconnected
input channels can be used for other functions. When an input pin is left open the internal 300kΩ pull down
resistor pulls the respective input pin to GND potential. For higher noise immunity use an external short across
an unconnected input and GND pins.
Figure 7. ULN2003LV as a Stepper Motor Driver
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Product Folder Link(s): ULN2003LV