From the datasheet:
Voltage on any Pin except RESET
with respect to Ground ................................-0.5V to VCC+0.5V
Since the VIN should be around 5v, 5.25 < 5.5v.
From the datasheet:
Voltage on any Pin except RESET
with respect to Ground ................................-0.5V to VCC+0.5V
Since the VIN should be around 5v, 5.25 < 5.5v.