Texas Instruments

SN74S38N

SN74S38N Description

The SN74S38N from Texas Instruments is a high-performance quad 2-input NAND gate with open-collector outputs, designed for robust digital logic applications. Housed in a 14-pin DIP package, this IC operates within a 4.75V to 5.25V supply range and is optimized for TTL (Transistor-Transistor Logic) systems. With a maximum propagation delay of 9ns at 5V and 150pF load, it ensures fast signal processing, making it suitable for high-speed logic circuits. The device features a wide operating temperature range (0°C to 70°C), ensuring reliability in industrial and commercial environments. Its open-collector outputs allow for flexible interfacing with higher-voltage or higher-current devices, enabling wired-AND configurations and bus driving applications.

SN74S38N Features

• Logic Type: Quad 2-input NAND gate with open-collector outputs.
• High-Speed Performance: 9ns propagation delay at 5V, ideal for timing-critical designs.
• Wide Voltage Range: Operates at 4.75V to 5.25V, compatible with standard TTL levels.
• Robust Input/Output Levels: V_IL = 0.8V (max), V_IH = 2V (min) for noise immunity.
• Open-Collector Outputs: Enables wired-AND logic and direct drive of LEDs, relays, or higher-voltage circuits.
• Durable Packaging: Through-hole 14-pin DIP for easy prototyping and rugged applications.
• Compliance: ROHS3 and REACH compliant, with EAR99 ECCN for unrestricted global shipping.

SN74S38N Applications

The SN74S38N excels in scenarios requiring high-speed logic with flexible output configurations:

• Bus Interface Systems: Open-collector outputs simplify multi-device communication (e.g., I²C, SMBus).
• Industrial Control: Drives relays, lamps, or motors directly due to high-current sink capability.
• Signal Conditioning: Used in pulse shaping and clock distribution circuits.
• Automotive Electronics: Reliable performance in sensor interfacing and diagnostic systems.
• Legacy TTL Upgrades: Replaces older NAND gates with improved speed and power efficiency.

Conclusion of SN74S38N

The SN74S38N stands out as a versatile, high-speed logic gate with open-collector flexibility, making it indispensable for digital design, industrial automation, and bus-oriented systems. Its low propagation delay, robust voltage tolerance, and compliance with environmental standards ensure longevity in demanding applications. For engineers seeking a reliable, high-performance NAND gate with backward compatibility and modern features, the SN74S38N is an optimal choice.