7402: Quad 2-Input NOR Gate

All four positive-logic NOR gates may be used independently. On any one gate, with either input high the output is low.

When both inputs are low the output is high. Note that this circuit is both logically different from the 7400 and has different pinouts.

Pinout
Pin # Pin Assignment
1 Output 1
2 Input 1A
3 Input 1B
4 Output 2
5 Input 2A
6 Input 2B
7 Ground
8 Input 3A
9 Input 3B
10 Output 3
11 Input 4A
12 Input 4B
13 Output 4
14 Power (+5V)

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