ON Semiconductor MC74VHC138DTR2G Decoder/Demultiplexer

The MC74VHC138DTR2G is a high-performance, integrated circuit from ON Semiconductor, designed to function as a 3-to-8 line decoder or demultiplexer. This versatile component is part of the VHC family of products, which are known for their low power consumption and high noise immunity characteristic of CMOS devices, combined with speeds similar to LSTTL (Low-power Schottky TTL).

Constructed with silicon gate CMOS technology, the MC74VHC138DTR2G offers a robust solution for applications requiring the distribution of a single input signal to one of eight outputs. Its design ensures minimal power dissipation yet provides a high-speed operation that is essential for modern electronic systems.

Featuring three binary select inputs (A, B, and C), the MC74VHC138DTR2G can decode a three-bit address to activate one of the eight mutually exclusive outputs. The device also includes an enable input (E1) and two active-low enable inputs (E2 and E3) for flexible control of the output states. When enabled, the corresponding output will go low, while all others remain high, thus allowing for the selection of the desired data path.

The MC74VHC138DTR2G is provided in a TSSOP-16 package, which is not only space-saving but also conducive for automated surface-mount assembly processes. This makes the device an excellent choice for dense circuit board layouts where space is at a premium.

Key features of the MC74VHC138DTR2G include:

• High-speed: t_PD = 4.8ns (typ) at V_CC = 5V
• Low power dissipation: I_CC = 2µA (max) at T_A = 25°C
• Power-down protection on inputs and outputs
• Operating voltage range: V_CC = 2V to 5.5V
• Pin and function compatible with other standard logic families
• Lead-free, RoHS compliant

With its high level of integration and performance, the MC74VHC138DTR2G is an ideal choice for a wide range of applications, including computer systems, data multiplexing, signal routing, and memory address decoding. ON Semiconductor's commitment to quality ensures that this decoder/demultiplexer will meet the stringent requirements of modern electronic designs, providing a reliable and efficient solution for system developers.