MC74VHCT157AM

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The MC74VHCT157AM is a high-speed, low-power quad 2-to-1 multiplexer and data selector device. It selects 4 bits of data from two sources under the control of a common Select input. An active LOW enables the device when EN is LOW. When enabled, the output passes data from the A input for SEL LOW and from the B input for SEL HIGH.

Application Field

The MC74VHCT157AM can be used for a variety of logic and signal switching applications, including multiplexing, decoders, multiplexers and data selectors. It is used in a variety of industry and consumer applications, such as storage and retrieval systems, industrial control systems, audio/video systems, automotive electronics and telecommunications networks.

Working Principle

The MC74VHCT157AM is a dual 2-input multiplexer and data selector that contains four individually selectable multiplexers. The device has a B group of four individual selectable multiplexers and each multiplexer is controlled by a single Select input. Data is selected from two sources based on the data select inputs. When the Select input is LOW, data from the A inputs is selected; when the Select input is HIGH, data from the B inputs is selected. An active LOW enables input (EN) is used to enable or disable the device. When EN is LOW, the device is enabled and data is passed either from the A inputs or B inputs depending on the states of the Select inputs; when EN is HIGH, the device is disabled and all outputs are LOW.

The device\'s outputs are designed to be compatible with various logic families. In TTL circuits, they are designed to drive both TTL and 5-volt CMOS devices. In 5-volt CMOS circuits, they are designed to drive 3-state, 5-volt CMOS devices. The outputs are provided with 10K ESD protection.

The MC74VHCT157AM is a very versatile and reliable device for switching and multiplexing data in a variety of applications. Its low power operation makes it particularly suited for battery powered applications or other low power applications. The device\'s wide operating voltage range allows it to be used in both logic and signal switching applications.

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