This device contains circuitry protecting against damage due to high static voltage or electrical fields; however, it is advisedthat normal precautions be taken to avoid application of any voltages higher than maximum-rated voltages to thishigh-impedance circuit. Reliability of operation is enhanced if unused inputs are tied to an appropriate logic voltage level (for
instance, VSS or VDD) or the programmable pull-up resistor associated with the pin is enabled.
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