74AC11257DBR

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The 74AC11257DBR, also known as 4-line to 16-line decoder/demultiplexer with 3-state outputs, exists in the category of logic-signal switches, multiplexers, and decoders. It has a variety of application fields and works on a specific principle. The purpose of this article is to outline an overview of the application fields and working principles of this logic device.

Application Fields

The 74AC11257DBR is an IC17(Integrated Circuit) chip composed of a four-line to 16-line decoder/demultiplexer with 3-state outputs, which is capable of selecting one of sixteen data sources by using four lines. As a result, the 74AC11257DBR application fields are used extensively in coding logic and communication fields that require precise control and quick data feedback. These include:

• Digital logic circuits that use decoders, multiplexers, and encoders.
• Verification systems.
• High-speed communication protocol systems.
• Multi-channel line communication protocols.

Ultimately, the 74AC11257DBR can be used in various other applications, such as systems for variable-resistance measuring, position measuring systems, and telecommunications systems. These systems enable the transmission of data that cannot be effectively managed by conventional designs.

Working Principle

The 74AC11257DBR is essentially a dual 4-line to 16-line multiplexer/decoder. It has a two-input binary control line (A0, A1, A2, A3) and one input enable (E1). All channels — 8 (D0-D7) and 16 (D8-D15) — are in active-LOW state, while a separate input enable (E2) allows for an active-HIGH state.

In the active-LOW condition, the decoder/multiplexer is enabled by whatever condition is assigned to input E1. This condition is configured through equations A, B, C and D, which determine whether the D0-D7 or D8-D15 outputs are asserted. This is done by bringing the high or low condition to A, B, C and D. Input E2 can be used to control the active-HIGH condition of all the 16 channels.

In a real-life application, the 74AC11257DBR decoder/multiplexer is used when the number of source signals needs to be properly demultiplexed to a single channel. It works on the principle of inputting four binary lines (A0, A1, A2, A3) and enabling line E1 to determine the output. It can also be used as a decoder when more than one input is required in order to select which output signal should be activated.

Conclusion

The 74AC11257DBR is a dual 4-line to 16-line multiplexer/decoder IC that is used to enable quickly encoding or decoding of digital data. It can be used in multiple applications, such as digital logic circuits, verification systems, high-speed communication protocols and multichannel communication protocols. Its working principle involves inputting four binary lines and enabling a single line to determine the output.

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