The minimum voltage required to maintain the clock and RAM data is 2.0V. Below this voltage, the clock and RAM data may be lost.
The internal oscillator has an accuracy of ±20 ppm (parts per million) over the operating temperature range of 0°C to 70°C.
Yes, the DS1302 can be used as a standalone clock chip without a microcontroller. It has a built-in oscillator and can generate a 1Hz clock signal on the SQW/OUT pin.
You can set the clock to a specific time and date by writing the desired values to the hour, minute, second, day, date, month, and year registers using the I2C interface.
When the battery is removed or the power is turned off, the DS1302 will retain the clock and RAM data for up to 10 years using the internal battery-backed registers.
