OM13485UL is a demonstration board for the NVT4556UK device with I2C control . The NVT4556 device is used to connect the SIM card to a low-voltage host-side interface. The NVT4556 contains LDOs that provide two different voltages: 1.8 V or 3 V for typical mobile phone battery voltages, and 3 voltages for converting the data, RSTn and CLKn signals between the SIM card and the main microcontroller. flat converter.
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