MC74AC377DWR2G

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Logic circuits are used to control various types of functions in an electronic system. Flip-flops are the most important logic elements for storing and retrieving the system’s data. MC74AC377DWR2G is a new generation of advanced logic flip-flop of the 74AC logic family with dual clock, dual reset, and dual separate data outputs. The MC74AC377DWR2G is designed to drive larger loads and can also be used in many applications.

Application Field

MC74AC377DWR2G can be used in many digital &computer applications, such as controlling data storage, data transfer and communication between digital devices. It can also be used in interface between digital and analog devices, such as media processing, security systems, wireless receivers and power control systems.MC74AC377DWR2G can be used in low power logic families, such as low noise logic gates, memory decoders, counter designs and bus transceivers. It is also suitable for use in more complex applications, such as for example, the design of shift registers, arithmetic / logic units, multiplexers and various data conversion systems.

Working Principle

MC74AC377DWR2G consists of two sets of two-way multiplexers, four separate internal clocking circuits and four sets of isolation transistors. Each multiplexer has eight data input lines, two control lines, two feedback lines and two outputs.

The two upper control lines enable the data select multiplexer to capture the data on the ‘Data’ port and propagate it to the output via the ‘Output A’ or ‘Output B’ lines, depending on the state of the ‘Select’ line. The multiplexer selects the data that is held on the ‘Data’ input port while the ‘Select’ line is held high. The other multiplexer allows the data to be sent to the ‘Data’ port while the ‘Select’ line is held low.

The internal clocking circuit is composed of a separate clocking and reset circuit per multiplexer. A latch circuit is used to protect the output from any variations in the input data. The first clock cycle initiates an internal reset which sets the output to a predetermined state. This ensures that the data on the ‘Data’ and ‘Select’ port is stable before the output is changed. The second clock cycle will toggle the output, unless the ‘Reset’ line is held low.

The separate ‘Enable’ line ensures that the multiplexer only acts upon a valid ‘Data’ and ‘Select’ port. When the ‘Enable’ line is low, the multiplexer is disabled, and the output will not change. This feature is especially useful, as it provides the user with the ability to stop the operation of the circuit when necessary. The MC74AC377DWR2G is also equipped with a complementary output for ‘Output A’ and ‘Output B’, allowing for a wider range of applications.

The MC74AC377DWR2G can be used in digital and computer applications, as well as in medium to high-density interface designs. It is highly versatile and can be configured in a variety of ways to meet the requirements of the system. The dual clock, dual reset and dual separate data outputs provide the designer with the flexibility to create a variety of applications in a single circuit, and to optimize its performance.

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