DS1673S-3+ datasheet by Maxim Integrated Products

DS1673S-3+ Frequently Asked Questions (FAQs)

• What is the recommended power-up sequence for the DS1673S-3+?
  The recommended power-up sequence is to apply VCC first, followed by VBAT. This ensures that the internal circuitry is properly initialized and that the device operates correctly.
• How do I ensure accurate timekeeping with the DS1673S-3+?
  To ensure accurate timekeeping, it is essential to use a high-quality crystal oscillator with a frequency tolerance of ±20 ppm or better. Additionally, the device should be calibrated periodically to account for any deviations in the crystal frequency.
• What is the purpose of the VBAT pin, and how should it be connected?
  The VBAT pin is used to connect a battery or a supercapacitor to maintain the RTC's operation during power failures. It should be connected to a battery or a supercapacitor with a voltage range of 2.7V to 3.6V, and a capacity of at least 10 μF.
• How do I reset the DS1673S-3+ to its default state?
  The DS1673S-3+ can be reset to its default state by applying a low signal to the RST pin for at least 100 ns. This will reset the device's registers and counters to their default values.
• What is the maximum frequency for the clock output on the DS1673S-3+?
  The maximum frequency for the clock output on the DS1673S-3+ is 32.768 kHz. This frequency is used to drive external circuitry or to provide a clock signal to other devices.