Logic Gate NOR 74HC02

AED 5.25



The Dual 2-input NAND gate of the Logic Gate NOR 74HC02 is a CMOS IC. It features a 14-pin package with 4 separate NOR gates inside of it. The maximum voltage for the IC power source has been set at 6V. The output of an inclusive NOR (Not-OR) gate is typically at logic level 1, and it only switches to logic level 0 when ALL of its inputs are at logic level 1.

we can define the operation of a 2-input digital logic NOR gate as being:

“If both A and B are NOT true, then Q is true”



  • Logic Type: NOR
  • Output Current: 5.2mA
  • No. of Inputs per gate: 2
  • Supply Voltage Min: 2V
  • Supply Voltage Max: 6V
  • Logic Case Style: DIP
  • No. of Pins: 14


Pinout of the IC:

File:74HC02 pinout.jpg

Pin Name Pin # Type Description
VDD 14 Power Supply Voltage (+3 to +15V)
GND 7 Power Ground (0V)
A1 to A4 1, 5, 8, 12 Input Inputs A of the four NOR gates
B1 to B4 2, 6, 9, 13 Input Inputs B of the four NOR gates
Q1 to Q4 3, 4, 10, 11 Output Outputs from the four NOR gates


The Digital Logic “NOR” Gate 2-input NOR Gate

Truth Table

2-input NOR Gate
0 0 1
0 1 0
1 0 0
1 1 0
Boolean Expression Q = A+B Read as A OR B gives NOT Q


Package Includes:

1 x 74HC02