74VHCT257AMTR

Series:	74VHCT
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Type:	Multiplexer
Circuit:	4 x 2:1
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-SO
Base Part Number:	74VHCT257

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Introduction

The 74VHCT257AMTR is a three-state, non-inverting unbuffered multiplexer/demultiplexer commonly used in logic, signal switching, and decoder applications. A number of different logic families of these multiplexers exist and they vary in speed, voltage, and complexity.

Application Field & Working Principle

74VHCT257AMTRs are used in a wide range of applications, including logic signal switching and decoder applications. These multiplexers take logic input signals and switch between them, allowing for the selected logic signal to be output. This type of multiplexer can be used for a variety of applications, such as low-power logic signal routing, as well as multiplexing/demultiplexing in systems with complex logic needs. When enabled, the 74VHCT257AMTR multiplexers act as a three-state, non-inverting multiplexer/demultiplexer. The multiplexer takes two input signals, A and B, and when activated, it switches the input signal to the corresponding output signal. The output is latched for the duration of the signal activation, and can be disabled by setting the enable signal (EN) to a logic 0. The 74VHCT257AMTR multiplexers use two-level logic hierarchies, so they can be configured to allow more complex operations than regular multiplexers. The two-level logic design also makes them ideal for use in low-power applications, as they can be configured to consume relatively low amounts of power.

Advantages & Disadvantages

The 74VHCT257AMTR multiplexers offer a number of advantages over other multiplexers. First, they are available in different packages and logic families, so they can be used for a variety of applications. Second, their two-level logic design allows for complex operations, making them suitable for applications with complex logic needs. Third, their low-power consumption makes them suitable for applications where power needs to be conserved. On the other hand, the 74VHCT257AMTR multiplexers have their limitations. For example, they have a limited operating voltage range, which limits their usefulness in applications with high voltage requirements. Additionally, their enable signal (EN) is active low, so it must be closely monitored to ensure signal control is maintained when using them.

Conclusion

The 74VHCT257AMTR multiplexers are widely used in logic, signal switching, and decoder applications. They are capable of complex operations because of their two-level logic design and can be used in low-power applications. While the 74VHCT257AMTR multiplexers have advantages, they also have their limitations, such as a limited operating voltage range and an active-low enable signal.

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