Product Overview: 74HCT138N by NXP Semiconductors

The 74HCT138N is a high-speed Si-gate CMOS device manufactured by NXP Semiconductors. It is designed to be a 3-to-8 line decoder/demultiplexer with inverting outputs. This integrated circuit is part of the 74HCT family, which is well-known for its compatibility with TTL (Transistor-Transistor Logic) levels, while providing the low power consumption and high noise immunity of CMOS technology.

Key Features

• Logic Family: The 74HCT138N belongs to the 74HCT series, ensuring compatibility with TTL logic levels while operating at a lower voltage range typical for CMOS devices.
• Decoder/Demultiplexer: It functions as a 3-to-8 line decoder or demultiplexer, which makes it an ideal choice for applications requiring binary decoding or data routing from a single input to multiple outputs.
• Inverting Outputs: All outputs of the 74HCT138N are inverting, providing an active LOW output level.
• Multiple Enable Inputs: The device includes three enable inputs (two active LOW and one active HIGH) to facilitate the demultiplexing and decoding functions.
• High Noise Immunity: The 74HCT138N features a high noise immunity characteristic of CMOS devices, making it suitable for use in electrically noisy environments.
• Low Power Consumption: It maintains the low power consumption benefits of CMOS integrated circuits, which is critical for power-sensitive applications.

Applications

The 74HCT138N is versatile and can be used in various applications such as:

• Memory decoding or data routing in computer systems
• Control logic for multiplexers, demultiplexers, and other digital systems
• Address decoding for peripheral control in microprocessor systems

Technical Specifications

• Supply Voltage (V<sub>CC): 4.5V to 5.5V
• Input Voltage (V<sub>I): 0V to 5.5V
• Output Voltage (V<sub>O): 0V to V<sub>CC
• Output Current: -25 mA to 25 mA
• Package: The 74HCT138N is available in a DIP-16 (Dual In-line Package) configuration, making it suitable for through-hole mounting.

With its robust design and comprehensive features, the 74HCT138N from NXP Semiconductors is a reliable choice for designers looking to implement efficient decoding and demultiplexing in their digital systems.