DS1302SN+ datasheet by Maxim Integrated Products

DS1302SN+ Frequently Asked Questions (FAQs)

• What is the recommended power-on reset circuit for the DS1302SN+?
  A simple RC circuit with a 1kΩ resistor and a 10μF capacitor can be used to provide a power-on reset signal to the DS1302SN+.
• How do I ensure that the DS1302SN+ oscillator starts reliably?
  To ensure reliable oscillator startup, a 1-10kΩ resistor can be connected between the X1 and X2 pins, and a 10-100pF capacitor can be connected between X1 and VCC.
• What is the maximum frequency deviation of the DS1302SN+ oscillator?
  The maximum frequency deviation of the DS1302SN+ oscillator is ±20 ppm over the entire operating temperature range.
• Can I use the DS1302SN+ with a battery backup?
  Yes, the DS1302SN+ can be used with a battery backup. The VBAT pin can be connected to a battery, and the device will automatically switch to battery power when the main power supply is removed.
• How do I set the initial time and date on the DS1302SN+?
  The initial time and date can be set by writing the desired values to the time and date registers using the I²C interface.