The recommended crystal oscillator frequency for the DS1337 is 32.768 kHz, which is a standard frequency for real-time clocks.
The DS1337 has a built-in battery switchover circuit that automatically switches to the backup battery during power failure, ensuring continuous operation of the real-time clock.
The maximum backup battery life for the DS1337 depends on the battery type and capacity, but typically ranges from 5 to 10 years, assuming a 48-mAhr battery and a 3V supply voltage.
Yes, the DS1337 can be used in a system with multiple power domains, as it has a separate power pin for the real-time clock (VCC) and the battery (VBAT), allowing it to operate independently of the system power domain.
The DS1337 has a built-in clock accuracy compensation circuit that adjusts the clock frequency to compensate for crystal oscillator deviations, ensuring an accuracy of ±2 minutes per year at 25°C.
DS1337S/T&R datasheet
by Maxim Integrated Products
