Product Overview: CD74HCT138M High-Speed CMOS Logic 3-to-8 Line Decoder/Demultiplexer

The CD74HCT138M is a high-speed CMOS Logic 3-to-8 line decoder/demultiplexer fabricated by Texas Instruments, designed to offer a robust and efficient solution for digital decoding applications. This integrated circuit is part of the HCT family, which is well-known for its compatibility with standard CMOS integrated circuits while offering the speed of TTL devices.

With its advanced silicon-gate CMOS fabrication, the CD74HCT138M ensures low power consumption and a balanced performance between propagation delay and power dissipation. This makes it an ideal choice for battery-powered devices, portable electronics, and other applications where power efficiency is crucial.

Key Features

• Logic Family: HCT
• Operating Voltage Range: 4.5V to 5.5V
• High Noise Immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V
• Output Current: Capable of driving 10 LSTTL loads
• Speed: Propagation delay time is typically 18 ns
• Temperature Range: -55°C to 125°C operational range, suitable for various environments
• Package: Available in SOIC-16 packaging, providing a compact footprint

Functional Description

The CD74HCT138M device is engineered to be a high-speed 3-to-8 decoder/demultiplexer. It accepts three binary weighted inputs (A0, A1, and A2) and, when enabled, provides eight mutually exclusive active-LOW outputs (Y0 to Y7). The device features three enable inputs: two active-LOW (E1 and E2) and one active-HIGH (E3). The demultiplexer function is performed by using E1 and E2 as enable inputs and E3 as the data input.

Applications for the CD74HCT138M include memory decoding or data routing where it simplifies the design by reducing the number of components required. This device is particularly well-suited for implementing logic functions and is commonly used in a wide range of digital systems, from consumer electronics to complex computing hardware.

Overall, the CD74HCT138M from Texas Instruments represents a reliable, high-performance solution for your digital decoding needs, combining low power consumption with high-speed operation in a small package.