MC74ACT157DR2G

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The MC74ACT157DR2G is an advanced, low-power CMOS logic device ideally suited for multiple-application logic systems. Its primary function is that of a two-input multiplexer that allows two data bits to be routed to an output node. This device is ideal for use in multiplexing applications, especially in systems with limited board space and power availability.

The key features of the MC74ACT157DR2G are its wide input range, fast switching time (3 ns typical), low power consumption and noise immunity. It has a reliable output logic voltage range (2.0-4.4 V), which allows for compatibility with a variety of logic technologies. The device has a total output impedance of 250 ohms, making it suitable for both high and low frequency applications. Additionally, it is available as an in-line SOIC or QFN package.

The MC74ACT157DR2G Multiplexer is used to select one of two input signals and route them to a single output. It is composed of two independent two-input multiplexers that are controlled by two separate select signals (S1 and S2). This allows the multiplexer to “gate” two separate data bits to the output node. Each of the two independent two-input multiplexers can also be independently enabled or disabled. The device features both positive edge-triggered logic (high-to-low transition on S1 and S2) and negative edge-triggered logic (low-to-high transition on S1 and S2). It also has a low power-down mode that powers down the device when S1 and S2 are both low.

The MC74ACT157DR2G application field mainly focuses on multiplexing applications where two data bits need to be fed to a single output node. The device is ideal for use in mobile phones, LCD displays, medical imaging systems, and automotive, industrial and military systems.

In terms of working principle, the MC74ACT157DR2G Multiplexer has two input lines (A and B) and two select lines (S1 and S2). The select lines are used to control the input that is routed to the output. When neither S1 nor S2 is high, the input state of A and B is undefined, so the output state is also indeterminate. If S1 is high and S2 is low, then A is routed to the output. If both S1 and S2 are high, then B is routed to the output. The device also has two enable lines (EN1 and EN2) that are used to enable or disable the two inputs independently.

The MC74ACT157DR2G is an ideal choice for multiplexing applications and is a widely used device for systems with limited board space and power availability. It is a reliable and low power device that provides quick switching times and good noise immunity. Its wide input range and low output impedance make it suitable for both high and low frequency applications.

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