Product Overview: MC74AC138 - ON Semiconductor

The MC74AC138 is a high-performance integrated circuit designed and manufactured by ON Semiconductor. This device is a 3-to-8 line decoder/demultiplexer featuring low power consumption and high noise immunity characteristic of CMOS products. The MC74AC138 is particularly suitable for implementing non-inverted decoding or demultiplexing functions, making it a versatile component for a wide range of applications in modern electronics.

This decoder/demultiplexer is designed to accept three binary weighted inputs (A0, A1, and A2) and, when enabled, provides eight mutually exclusive active-LOW outputs (O0 to O7). The MC74AC138 features three enable inputs: two active-LOW (E1 and E2) and one active-HIGH (E3). These enable inputs must be at appropriate logic levels to activate the device's decoding function. When the enable conditions are not met, all outputs remain in the high-impedance state, which is beneficial for interfacing with bus-oriented systems.

The device operates over a broad voltage range of 2V to 6V and is capable of driving 10 LSTTL loads. It is characterized for operation from -55°C to 125°C, making it reliable for use in extreme environmental conditions. The MC74AC138's fast propagation delay and transition times ensure high-speed operation, which is essential for modern digital systems requiring rapid data processing and throughput.

ON Semiconductor's commitment to quality ensures that the MC74AC138 meets stringent standards for performance and durability. The device is available in different package options, including the 16-lead dual-in-line plastic package and the smaller surface-mount SOIC-16 package, providing flexibility in PCB design and space-saving opportunities for compact electronic assemblies.

In summary, the MC74AC138 from ON Semiconductor is a reliable and efficient solution for decoding and demultiplexing applications. Its low power consumption, high noise immunity, and wide operating temperature range make it an ideal choice for use in a variety of digital systems, including communication devices, computer systems, and industrial control panels.