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RTC PCF85363ATL and PCF85263ATL Internal protection

Question asked by Satish Ghariya on Jan 16, 2018
Latest reply on Nov 23, 2018 by Markus Wettstein

In RTC PCF85363ATL/AX and PCF85263ATL, Internal battery switchover circuit is present. Also both the parts are UL listed part.

My question here is--> Do we need to add series resistor or diode or both for the battery protection. Is there any internal current limiting protection on battery pin and also is any protection diode internally.