FXLH42245MPX

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Logic level translators, also known as level shifters, allow the transfer of logic signals between two domains of different logic levels. The FXLH42245MPX is an example of such a logic level translator, and it allows for interfacing between a low logic level and a higher logic level, like from 1.2V to 3.3V.

The FXLH42245MPX uses a two-MOSFET two-channel design, where one ofthe input signal is level translated and the other signal is isolated. A high-side MOSFET is used for level translation using the on-resistance technique. On the other side, a low-side driver MOSFET is used for signal isolation.

When the FXLH42245MPX is inactive, the low-side MOSFET is ON, and thusmaintains the level of the logic signal on the output regardless of what is connected to the input. When the device is switched active, both devices are switching simultaneously, translating the level of the input signal and isolating the output signal from the input.

The FXLH42245MPX is primarily useful in applications where one logic level must be translated to another. For instance, if a 1.2V device must communicate with a 3.3V device, the FXLH42245MPX can be used to level-shift the 1.2V signals to 3.3V for compatibility.

In addition to level shifting, the FXLH42245MPX can also be used to buffer logic signals. When the device is switched “on,” its high-side MOSFET acts as a buffer between the input and output, providing increased signal drive strength and improved noise immunity. This is useful in applications where there is a need for higher signal drive strength than the source device can provide.

The FXLH42245MPX is also used in applications where isolation is required.The low-side MOSFET is used to provide complete signal isolation between the input and output, preventing interference and noise from transmitting between the two logic domains.

Overall, the FXLH42245MPX is a versatile device, combining the features of level shifting, buffering, and signal isolation into one convenient device. It is an essential tool for communicating between two domains of different logic levels, and it provides excellent signal performance while requiring minimal external components and allowing for an easy interface with the external logic.

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