The IC 7402 offers four independent 2-input NOR gates in a single 14-pin Dual In-line Package (DIP). It belongs to the 7400 TTL logic series, which engineers often use for creating digital logic circuits. Each NOR gate inside the chip outputs HIGH only when both inputs stay LOW. You can create any logic function using just NOR gates, which makes the 7402 a powerful building block. It operates on a 5V supply and ensures fast switching, low power consumption, and stable signal processing.
The IC supports TTL voltage levels, so it connects easily with other standard TTL devices. Hardware designers use the 7402 in logic controllers, timing circuits, data processing units, and educational labs. Students build truth tables, latches, and waveform shaping circuits with this IC. Engineers rely on it to execute reliable logic operations in embedded systems, control panels, and industrial machines. Designers often select the 7402 for creating combinational logic, signal control circuits, timing logic, and basic storage elements.
Features
Includes 4 independent 2-input NOR gates
Supports standard TTL voltage levels (typically 5V)
Offers fast switching and noise-resistant performance
Works in 0°C to 70°C temperature range
Comes in a 14-pin DIP or SOIC package
Uses low power compared to older logic designs
Operates consistently with TTL-compatible inputs/outputs
Applications
Digital logic circuits
Signal control systems
Timing and pulse circuits
Logic level interfacing
Flip-flop and latch circuits
Combinational logic blocks
Control panels and automation
Microprocessor-based systems
Educational electronics projects
DIY digital logic experiments
Specifications
| Parameter | Value |
|---|---|
| Logic Family | TTL (Standard) |
| Number of Gates | 4 |
| Gate Type | NOR |
| Number of Inputs per Gate | 2 |
| Supply Voltage (Vcc) | 4.75V to 5.25V |
| Typical Operating Voltage | 5V |
| High-Level Output Current | -400 µA |
| Low-Level Output Current | 16 mA |
| Propagation Delay | ~10 ns ‘ |
| Power Dissipation | ~10 mW |
| Input Current (Max) | 1.6 mA |
| Operating Temperature Range | 0°C to 70°C |
| Package Type | DIP-14 / SOIC-14 |
| Pin Count | 14 |
