M74HCT4852ADTR2G

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The M74HCT4852A is an advanced version of the analog switch, multiplexer and demultiplexer device. It is a member of a family of low-voltage, high-speed, highly-integrated interface logic devices which combines various interface and memory functions in a single chip.

The M74HCT4852A offers a pair of broader fan-out multiplexers with a wide analog voltage range. The multiplexers provide a “two-way” switching capability by connecting one input signal to the appropriate output under direct digital control. This feature allows the device to double the 8-bit multiplexer to 16-bits.

The M74HCT4852A is ideal for applications in which two analog signals need to be multiplexed. The device can be used for applications such as mobile phones, set-top boxes, and other consumer electronic products where space and cost are at a premium.

The working principle behind the M74HCT4852A is fairly straightforward. In a two-channel application, the device basically multiplexes two input analog signals to one output. The device has two input pins (see Figure 1), one for each signal, and four output pins. Depending on the number of multiplexers the output can vary from one to four. The four output pins include one enable pin which is used to enable/disable the multiplexer and three control pins. The control pins are used to select one of the two analog input signals.

The M74HCT4852A is designed to cope with low-voltage analog signals. It has a very low input resistance of less than 500Ω in the high-impedance state, and a very low off-capacitance of less than 500pF. It also has an extremely fast switch-off time of 70ns maximum, making it ideal for fast switching applications.

The device has a wide analog voltage range from 0V to 3.3V. The maximum output current for each control pin is 300mA and the maximum output noise current is about 3µA. This makes it suitable for use with low signal levels as well as medium-to-high signal levels.

In summary, the M74HCT4852A is an ideal device for applications such as switching two analog signals or multiplexing them to one output. It has low resistance and low off-capacitance, a wide voltage range, and a fast switching time. It is suitable for fast and low-noise operation while being cost-effective and space-efficient.

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