SN74CBT6800ADW

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SN74CBT6800ADW is a high-speed quad 8-bit CMOS multiplexer/demultiplexer. It is a Logic - Signal Switches, Multiplexers, Decoders device that is designed to mitigate the effects of Electrostatic Discharge (ESD) in CMOS technology. These devices are commonly used to switch or multiplex multiple input signals into one or more output signals. They can also be used to decode a single input signal into multiple output signals.

Where It Is Used? SN74CBT6800ADW is typically used in high-frequency applications where multiplexing and demultiplexing signals is a necessity. It is commonly used in signal switching, signal conditioning, signal processing, data communication, optical networks, and digital signal processing. It can also be used in baseband communication systems, as well as in digital signal transmission and signal acquisition applications.

Working Principle of SN74CBT6800ADW: The device is constructed with two independent 16-bit high-speed circuits, one for multiplexing and the other for demultiplexing. The dual 8-bit registers can independently select one of eight active high or low outputs, each associated with one of four common select lines. The dual 8-bit register enables the device to multiplex up to 256 inputs. The device is driven by a 2.5V/3.3V supply and operates with a data rate of up to 667 Mbps. An internal shift register is used to store the control bits, and this is followed by an 8-bit selector for the selected signals.

An internal latch is used to latch the control bits into the shift register, and an internal logic block is used to de-multiplex the data. The input and output signals are 3-state and on-off signals, respectively. The device can also be used as a 4-bit multiplexer and demultiplexer in which case four separate 8-bit channels can be multiplexed and demultiplexed. The 8-bit output select signals include four inverting and four non-inverting outputs, each with a separate enable pin.

The internal multiplexer consists of two 4-bit selectors, one for each half. The selection is done by a two-bit control input which will select one of the potential active inputs, depending on the value of the control bits. When both of these control bits are high, all 8-bits of data can be selected. When only one of them is high, only 4-bits of data will be selected. This is useful in applications requiring the multiplexing of data into smaller channels for transmission and back out again for decoding.

SN74CBT6800ADW has separate enable pins for both the multiplexer and demultiplexer circuits. The enable pins allow the disabling of both circuits independently. This feature reduces power consumption and simplifies the design. It also reduces distortion in multiplexed data due to the enable pins forcing the high impedance states when disabled.

SN74CBT6800ADW is a commonly used high-speed family of devices for multiplexing and demultiplexing signals. Its simplicity and ability to integrate into digital circuits make it an attractive solution for multiplexing/demultiplexing applications. It is able to multiplex/demultiplex multiple inputs through the single output or vice versa, efficiently and effectively, hence providing necessary bandwidth and flexibility for many digital applications.

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