STMicroelectronics 74VHCT138ATTR 3-to-8 Line Decoder/Demultiplexer

The 74VHCT138ATTR is a high-speed CMOS 3-to-8 line decoder/demultiplexer integrated circuit, manufactured by STMicroelectronics. This device is designed to be used in high-performance memory decoding or data routing applications, where speed and reliability are of paramount importance. It is particularly well-suited for implementing non-inverting decoders and demultiplexers with three binary select inputs (A, B, and C), an enable input (E), and eight mutually exclusive outputs (Y0 to Y7).

The 74VHCT138ATTR is part of the VHCT family, which means it combines the high noise immunity and low power consumption of CMOS technology with the speed to match TTL devices. It operates at a voltage range of 4.5V to 5.5V, making it compatible with 5V systems. The device also features low quiescent current, which is a significant advantage in power-sensitive designs.

Each output of the decoder can drive up to 8 LSTTL loads, which provides the capability to fan out over a wide range. The 74VHCT138ATTR is also characterized for operation from -40°C to +85°C, ensuring reliable performance across a broad range of industrial temperatures. This makes it an excellent choice for demanding applications in the industrial, automotive, and consumer electronics sectors.

The device's package is TSSOP, which stands for Thin Shrink Small Outline Package. This package type is known for its compact footprint and suitability for space-constrained applications. The "ATTR" suffix indicates that the product comes in tape and reel packaging, which is ideal for automated assembly processes.

For ease of integration, the 74VHCT138ATTR is fully specified for partial power-down applications using Ioff. The Ioff circuitry ensures that no damaging current will backflow through the device when it is powered down. This feature is critical for battery-powered devices, where power conservation is crucial.

Overall, the STMicroelectronics 74VHCT138ATTR is a versatile and efficient solution for your decoding and demultiplexing needs, combining speed, power efficiency, and robustness in a compact package.