74LS02 Quad 2 Input NOR Gate IC (7402) DIP 14 Package

The 74LS02 is a Quad 2-Input NOR Gate IC from the 74LS (Low Power Schottky TTL) logic family.
It contains four independent NOR gates, each with two inputs, and performs the logical NOR function — the output is HIGH only when both inputs are LOW, otherwise the output is LOW.

This IC is a fundamental digital logic component widely used in combinational logic circuits, signal control, oscillator circuits, and digital systems.
The 74LS series provides fast switching speeds, low power consumption, and excellent noise immunity, making it ideal for general-purpose digital logic applications.

• Four Independent NOR Gates
• 14 Pin IC
• Operating Temperature to 70 Deg C
• High-Speed CMOS Type

Functional Description

Each of the four NOR gates operates independently.

• The output goes HIGH only if both inputs are LOW.
• If any input is HIGH, the output becomes LOW.
• By interconnecting multiple gates, you can create AND, OR, NOT, NAND, or XOR logic functions.
• A single NOR gate can also act as a NOT gate if both its inputs are tied together.

Applications

• Basic logic function implementation
• Oscillator and timing circuits
• Logic level conversion
• Signal inversion and control
• Combinational and sequential logic systems
• Microcontroller interface logic
• Logic synthesis (using universal NOR logic)

74ls02-ic-datasheet