ON Semiconductor MC74ACT138DTR2 - 3-to-8 Line Decoder/Demultiplexer

The MC74ACT138DTR2 is a high-performance, 3-to-8 line decoder/demultiplexer designed by ON Semiconductor, an industry leader in semiconductor solutions. This integrated circuit is part of the AC/ACT series, which is renowned for its high-speed operation and compatibility with TTL (Transistor-Transistor Logic) levels. The MC74ACT138DTR2 is particularly useful for applications that require the conversion of a binary input to a one-of-eight output, making it ideal for a wide range of decoding tasks within digital systems.

Constructed with advanced CMOS technology, the MC74ACT138DTR2 offers a significant reduction in power consumption compared to its TTL counterparts, while still maintaining the ability to operate at TTL-compatible voltage levels. This makes it a versatile choice for modern low-power, high-speed digital designs. Its robust design ensures reliable operation with a supply voltage range of 4.5V to 5.5V, which is typical for 5V digital systems.

The device features three binary select inputs (A, B, and C), an enable input, and eight mutually exclusive outputs. The enable input facilitates easy expansion of the decoder to decode higher bit combinations with minimal additional circuitry. When the enable input is high, all outputs remain in the off state, regardless of the binary select inputs. This feature is particularly useful for implementing chip select functions in microprocessor-controlled systems.

The MC74ACT138DTR2 comes in a TSSOP-16 package, which is designed for space-saving on PCBs (Printed Circuit Boards) without compromising thermal and electrical performance. This package is also well-suited for automated surface-mount assembly processes, providing ease of integration into a variety of electronic devices.

With its fast propagation delay and high noise immunity, the MC74ACT138DTR2 is an excellent choice for high-speed data processing, memory decoding, and address decoding in complex digital systems such as computers, communication devices, and advanced consumer electronics. Its reliability and ON Semiconductor's commitment to quality make it a trusted component for engineers and designers seeking to optimize their digital applications.