ON Semiconductor MC74HC138AD Decoder/Demultiplexer

The MC74HC138AD is a high-performance, silicon-gate CMOS device from ON Semiconductor that serves as a 3-to-8 line decoder/demultiplexer. This integrated circuit is designed to be used in applications requiring high-speed decoding and demultiplexing, making it an excellent choice for a wide range of electronic systems.

The MC74HC138AD features three binary select inputs (A, B, and C), an enable input, and eight mutually exclusive outputs. It is capable of decoding a three-bit binary input into one of eight output lines, with each output going low when selected. The enable input facilitates easy expansion of the device to decode a 4-bit binary code with additional MC74HC138AD chips or to inhibit the outputs.

With its advanced CMOS technology, the MC74HC138AD offers a significant advantage in power consumption over its TTL counterparts. It operates on a wide voltage range of 2V to 6V and has a low quiescent current, making it suitable for battery-operated and low-power applications. Additionally, the device has a high noise immunity characteristic of CMOS circuitry, ensuring reliable operation even in noisy environments.

The MC74HC138AD is available in a 16-pin SOIC package, providing a compact footprint for space-constrained applications. Its pin configuration is carefully designed to enable easy PCB layout and integration into complex circuits without hassle.

Key features of the MC74HC138AD include:

• 3-to-8 line decoder/demultiplexer functionality
• High-speed operation
• Low power consumption
• Wide operating voltage range (2V to 6V)
• High noise immunity
• 16-pin SOIC package for ease of integration

Whether used in microprocessor systems, memory decoding, data routing applications, or for driving lamps and relays, the MC74HC138AD from ON Semiconductor is a versatile and reliable choice that offers both performance and efficiency.