DS1305EN+T&R datasheet by Maxim Integrated Products

DS1305EN+T&R Frequently Asked Questions (FAQs)

• What is the recommended power-on reset circuit for the DS1305?
  A simple RC circuit with a 1kΩ resistor and a 10μF capacitor can be used to ensure a clean power-on reset.
• How do I handle the battery switchover during power failure?
  The DS1305 has an internal switchover circuit that automatically switches to the battery when the main power fails. No external circuitry is required.
• What is the accuracy of the internal oscillator?
  The internal oscillator has an accuracy of ±20 ppm over the operating temperature range of -40°C to +85°C.
• Can I use the DS1305 with a rechargeable battery?
  Yes, the DS1305 can be used with a rechargeable battery, but it's recommended to use a battery with a low self-discharge rate to ensure accurate timekeeping.
• How do I set the clock initially?
  The clock can be set initially by writing the desired time and date to the clock registers using the I²C interface.