MC74VHCT138ADR2

Series:	74VHCT
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Type:	Decoder/Demultiplexer
Circuit:	1 x 3:8
Independent Circuits:	1
Current - Output High, Low:	8mA, 8mA
Voltage Supply Source:	Single Supply
Voltage - Supply:	4.5 V ~ 5.5 V
Operating Temperature:	-55°C ~ 125°C
Mounting Type:	Surface Mount
Package / Case:	16-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	16-SOIC
Base Part Number:	74VHCT138

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MC74VHCT138ADR2 application field and working principle

The MC74VHCT138ADR2 is a high-performance, low-power digital CMOS device used for signal switches, multiplexers and decoders. It is designed to accept signals from many digital sources such as microprocessors, memories, logic chips and digital-to-analog converters. This particular device is a single 8-input multiplexer/demultiplexer.

Application Fields

The MC74VHCT138ADR2 is designed for use in a wide range of applications including automotive, consumer, computer and telecommunications products. It offers convenience and flexibility for a wide range of signal switching purposes.The MC74VHCT138ADR2 is a versatile device used for switching and routing of signals. This can be used for both digital and analog signals. It is suitable for a variety of applications in which signal switching, multiplexing and decoding is required.

Multiplexers and Demultiplexers

A multiplexer is a digital device that takes multiple signal inputs and outputs them in a single serial data stream. It is used to save time and simplify signal routing. A multiplexer is also known as a data selector or signal selector.The MC74VHCT138ADR2 offers 8 digital inputs, and an active low enable signal (E). Input signals can be switched in any combination.A demultiplexer is the inverse of a multiplexer. It takes a single serial digital data stream and outputs it as multiple parallel data signals. The MC74VHCT138ADR2 also offers a demultiplexer mode, which is activated by the active low enable signal (E).

Decoders

A decoder is a digital device that interprets and translates the output of one or more signals into its corresponding binary form. The decoder is used for a variety of purposes, such as for automatic circuit testing, testing of logic systems, or in automated control systems.The MC74VHCT138ADR2 offers a 3-to-8 digit decoder with an active low signal E. In this mode, the output will be in the form of an 8-bit binary format.

Working Principle

The MC74VHCT138ADR2 is a high-performance, low-power digital CMOS device. It has a wide input range of 0-5.5V, with a maximum low level of 0.8V. The output includes a Schmitt trigger and is capable of driving up to 15mA.The MC74VHCT138ADR2 uses a CMOS multiplexer/demultiplexer to switch between the various input signals and to convert them into the final output signal. When no enable signal is present, the enable is inactive and the input signals are disconnected from the output. When an active low enable signal is present, the device begins to select the appropriate inputs and route them to the output.For the decoder mode, the MC74VHCT138ADR2 uses an 8-bit binary format to interpret the input signals. The output of this mode is a 3-bit output that is related to the decoded results. Overall, the MC74VHCT138ADR2 is an ideal solution for a variety of signal switching, multiplexing and decoding applications. It is easy to use and fast to configure. Its wide range of input and output options make it a versatile device, suitable for a wide range of applications.

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