74ACT257MTR

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Logic circuitry is a complex and often overlooked aspect of electronic designs. Logic chips, with all of their different sizes, shapes and functions, can be used to create sequences, counters, and decimers, as well as often-complicated tasks such as multiplexing. One such chip is the 74ACT257MTR, a high-speed, low-power, CMOS logic IC designed for use in systems requiring very high performance. 74ACT257MTR is a quad 2-line-to-1-line multiplexer/demultiplexer that has four 2-input multiplexer sections and four 1-input demultiplexer sections. Each section can be individually addressed by a different address input as long as all other address inputs represent the same logic state. This chip can be configured in various combinations of 2-to-1 multiplexer and 1-to-2 demultiplexer, both synchronous and asynchronous.

In its simplest configuration, the 74ACT257MTR is a 4X1 multiplexer, meaning it can select one of the four data signals and route it to its output. A control line, known as a “select” signal, is used to determine which of the four inputs is presented at the output. This chip also has an active-low enable input, which allows for improved signal timing and eliminating otherwise unneeded capacitive loading.

In its most complex configuration, the 74ACT257MTR can be used as a 4x4 demultiplexer, meaning it can separate 4 data signals and route each to one of the 4 outputs. This is accomplished by using 4 control lines, each with its own address input, to determine which of the 4 inputs is presented at the output. At the same time, the active low enable input is used to control the timing of the signals.

The 74ACT257MTR is suitable for use in a variety of high-speed applications such as data synchronization and buffering, video distribution and multiplexing, digital potentiometers, and address decoding. It is also well-suited for other applications such as programmable logic devices, microprocessor/microcontroller bus systems, memories, and peripheral interface devices.

The 74ACT257MTR is designed to operate from either a single +5V supply or dual +3.3V and +5V supplies, and it can be used in temperatures ranging from -40°C to +85°C. The device also features low-power consumption (1mA max) and high-speed operation (-5V to +5V transition times of 8ns max). Additionally, it features symmetrical output transition times, Schmitt trigger inputs, and 2.7V to 5.5V TTL-compatible inputs.

Due to its combination of features, the 74ACT257MTR is ideally suited for a variety of logic-switching, multiplexing and decoding applications. This device is well-suited for use in systems requiring high-speed and low-power performance, such as those found in telecommunications, data processing, automotive, and many industrial applications.

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