ULN2003V12

IN3

IN4

OUT1

OUT2

OUT3

OUT4

IN5

IN6

IN7

GND

OUT5

OUT6

OUT7

COM

IN1

IN2

Logic Inputs

(1.8V to 5V)

VSUP (Up to 20V)

IN1 NOR IN2

IN3 NOR IN4

VSUP

VSUP

IN1 NOR IN2 NOR IN3

ULN2003V12

SLRS060A – MAY 2012 – REVISED JUNE 2012

www.ti.com

NOR Logic Driver

Figure 8 shows a NOR Logic driver implementation using ULN2003V12. The output channels sharing a common

pull-up resistor implement a logic NOR of the respective channel inputs. The LEDs connected to outputs OUT5-

OUT7 light up when any of the inputs IN5-IN7 is logic-high ( > VIH).

Figure 8. ULN2003V12 as a NOR driver

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