Max Supply voltage to RTC - what happened??

[shabbirn]

What happened if the RTC chip say DS1390-3 is operated with its MAXIMUM recommended supply voltage 3.3 V for a long period. What happened if any high fluctuations are appeared in the Supply voltage.

 

[alexan_e]

3.3v is the recommended voltage (actually a range, 2.97v - 5.5v), the absolute max is 6v and if you go past that the datasheet says

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.