7402 Quad 2-Input NOR Gate IC

The 7402 is a TTL logic IC containing four independent 2-input NOR gates in a single 14-pin DIP package. Each gate outputs HIGH only when both of its inputs are LOW. Like the NAND gate, the NOR gate is a universal gate, so the 7402 can be wired to build any other logic function, including AND, OR, NOT, NAND and XOR, as well as latches, flip-flops and simple oscillators. It is a useful chip for students, hobbyists and engineers working on digital circuits. Key Features Four independent 2-input NOR gates in one package Standard TTL logic family, compatible with 5V digital circuits 14-pin DIP package, breadboard and PCB friendly Fast switching, with a typical propagation delay of about 10 ns Low cost and easy to use for learning and prototyping Specifications Type: Quad 2-Input NOR Gate Logic Family: TTL (7400 series) Supply Voltage (VCC): 4.75V to 5.25V (5V nominal) Package: DIP-14 Operating Temperature: 0°C to 70°C (commercial grade) Logic Function: Y = NOT (A OR B) Pin Configuration The 7402 pinout differs from the 7400: the output of each gate comes first. Pin 14: VCC Pin 7: GND Gate 1: pin 1 (output), pins 2, 3 (inputs) Gate 2: pin 4 (output), pins 5, 6 (inputs) Gate 3: pin 10 (output), pins 8, 9 (inputs) Gate 4: pin 13 (output), pins 11, 12 (inputs)