MC74AC245DTR2

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Logic - Buffers, Drivers, Receivers, Transceivers

The MC74AC245DTR2 is an octal bus transceiver and can be used for a variety of application fields. It is from the 74AC logic family which was designed by Motorola with the intention of providing high performance FET technology. Its operating temperature ranges from 0°C to 70°C (32°F to 158°F), and its maximum supply voltage is 6V, making it a perfect fit for low voltage applications including battery operated devices.

The MC74AC245DTR2 has 3-state outputs with bus hold on the data inputs, eliminating the need for external pull-up resistors connected to the bus lines. It also has an enable pin that prevents the device output from being damaged by short circuits when the enable pin is held high. Additionally, it includes Schmitt triggers, providing improved noise immunity for communication busses.

The MC74AC245DTR2 works in the following way: each of the octal transceivers features an enable input (E), two data inputs (A0 and B0), two bus outputs (Y0 and Y1) and two complementary bus outputs (Z0 and Z1). On the enable input, when E is low, the outputs become high-impedance, so that data inputs can be written to their respective outputs. The data input A is used to write data to the output Y, while the data input B is used to write data to the output Z. When E is high, the outputs will take on the values of the respective data inputs.

Furthermore, the bus hold feature of the MC74AC245DTR2 holds the previously written data until new data is written to the bus by setting E to low and then back to high. This feature is especially useful when the bus is slow, enabling the data to remain valid for longer periods of time between writes. In addition, the device has an adjustable slew rate for both outputs, reducing the noise in signal lines, eliminating glitches and allowing for faster switching speeds.

The MC74AC245DTR2 can be used in a variety of applications ranging from data buffer and transmitter/receiver applications to bus line switching and bus isolation applications. For example, it can be used in communication systems to isolate the transmitter and receiver with no cross-talk between the two sides, providing superior noise immunity and protecting the system against electromagnetic interference (EMI). It can also be used in logic buffer applications to easily couple two parts of a logic system together and increase its speed. Additionally, the MC74AC245DTR2 can be used in multiplexer applications where it can increase the number of data lines which can be selected in the system.

Overall, the MC74AC245DTR2 is a valuable device when it comes to buffering and transmitting data from one line to another. It can be used in a variety of applications and its features, such as its 3-state outputs, adjustable slew rate, and bus hold Features make it a great choice for low voltage applications. The MC74AC245DTR2 is an excellent choice for applications such as data buffer, transmitter/receiver applications, bus line switching, and bus isolation, as well as multiplexer applications.

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