DS1307N+ datasheet by Maxim Integrated Products

DS1307N+ Frequently Asked Questions (FAQs)

• What is the recommended crystal oscillator frequency for the DS1307N+?
  The recommended crystal oscillator frequency for the DS1307N+ is 32.768 kHz.
• How do I set the clock to start counting from a specific date and time?
  You need to write the desired date and time to the clock registers (seconds, minutes, hours, day, date, month, and year) in binary-coded decimal (BCD) format.
• What happens if the battery voltage drops below the minimum operating voltage?
  If the battery voltage drops below the minimum operating voltage (typically 1.5V), the DS1307N+ will reset and the clock will stop. When the voltage returns to a valid level, the clock will restart from the last known good time.
• Can I use the DS1307N+ with a rechargeable battery?
  Yes, the DS1307N+ can be used with a rechargeable battery. However, you need to ensure that the rechargeable battery has a low self-discharge rate to maintain the clock's accuracy.
• How accurate is the DS1307N+ clock?
  The DS1307N+ has an accuracy of ±20 ppm (parts per million) at 25°C, which translates to an error of approximately 1 minute per year.