Texas Instruments

SN7402N

SN7402N Description

The SN7402N from Texas Instruments is a quad 2-input NOR gate integrated circuit belonging to the industry-standard 7400 series. Housed in a 14-pin DIP (Dual Inline Package), this through-hole-mount IC operates within a 4.75V to 5.25V supply range, making it compatible with 5V TTL (Transistor-Transistor Logic) systems. Designed for reliability, it features a maximum propagation delay of 22ns at 5V with a 15pF load, ensuring efficient signal processing in digital circuits. With four independent NOR gates, each accepting two inputs, the SN7402N is ideal for implementing Boolean logic functions, signal conditioning, and system control.

SN7402N Features

• Logic Type: Quad 2-input NOR gate with 4 circuits in a single package.
• Performance: Low propagation delay (22ns) and high noise immunity, ensuring stable operation in noisy environments.
• Power Efficiency: Operates at TTL voltage levels (5V) with low output current (400µA high, 16mA low), reducing power consumption.
• Robust Design: Wide operating temperature range (0°C to 70°C), making it suitable for industrial and consumer applications.
• Compliance: ROHS3 compliant, REACH unaffected, and EAR99 classified for global regulatory adherence.
• Input/Output Compatibility: Input high threshold (2V) and low threshold (0.8V) ensure reliable interfacing with other TTL devices.

SN7402N Applications

The SN7402N is widely used in digital logic design, including:

• Signal Inversion & Gating: Essential for flip-flops, latches, and clock synchronization circuits.
• Control Systems: Used in microprocessor-based systems for address decoding and bus management.
• Pulse Shaping: Ideal for debouncing switches and generating clean logic pulses.
• Industrial Automation: Deployed in PLC (Programmable Logic Controller) interfaces and safety interlock circuits.
• Consumer Electronics: Found in legacy computing, gaming consoles, and embedded control modules.

Conclusion of SN7402N

The SN7402N stands out as a versatile, high-performance NOR gate IC, offering low power consumption, fast switching, and robust TTL compatibility. Its through-hole DIP package simplifies prototyping and repair, while its wide operating range ensures reliability across diverse applications. Whether used in industrial automation, digital logic circuits, or legacy electronics, the SN7402N delivers consistent performance and design flexibility, making it a trusted choice for engineers.