DM74AS648WM

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The DM74AS648WM is a part of a family of multiplexer/de-multiplexer logic circuits. All of the members of this family are high-speed, CMOS devices that are designed primarily to switch digital signals, multiplex signals, supply bus-oriented systems, or convert the logic level or impedance of digital systems. This family is usually classified under the category of logic buffers, drivers, receivers, and transceivers.

In specific, the DM74AS648WM is a dual 4-to-1 multiplexer/de-multiplexer logic circuit. It includes two 4-bit multiplexers and two 4-bit de-multiplexers on a single monolithic integrated circuit, ideally suited for use in bus-oriented systems. It comes with a choice of TTL or CMOS compatible outputs, and can be implemented in various applications such as memory and data management, or control and address decoding.

The device can be used to switch 16 lines between two groups of four signal lines. The DM74AS648WM has four TTL/CMOS compatible input sets of A0 to A3, B0 to B3, Y0 to Y3, and Z0 to Z3. Out of the four select inputs that compose S0 to S3, two select inputs (S2 and S3) are common to both 4-bit multiplexers and 4-bit de-multiplexers.

The working principle of DM74AS648WM is quite simple. When the select logic is LOW, the A and B inputs are provided to the output. If the logic is HIGH, the Y and Z inputs will be provided to the output. Depending on the number of HIGHs on the select lines, one set of 4 bits will be provided at the output– either the A and B sets (select logic = LOW) or the Y and Z sets (select logic = HIGH).

The DM74AS648WM can be used in applications such as memory and data management, and control and address decoding. It is also ideal for multiplexer/de-multiplexer systems and switching networks due to its CMOS compatible inputs and outputs. Its ability to switch and multiplex 16 lines between two groups of four signal lines make it ideal for a wide range of applications.

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