DS1670S+ datasheet by Maxim Integrated Products

DS1670S+ Frequently Asked Questions (FAQs)

• What is the recommended power-up sequence for the DS1670S+?
  The recommended power-up sequence is to apply VCC first, followed by VBAT. This ensures that the internal voltage regulator is powered up correctly and that the device operates reliably.
• How do I ensure that the DS1670S+ is in a low-power state when not in use?
  To minimize power consumption, set the CE pin low, and ensure that the SCL and SDA pins are not toggling. Additionally, consider using the device's built-in power-down mode by writing the appropriate value to the control register.
• What is the maximum clock frequency that the DS1670S+ can support?
  The DS1670S+ can support clock frequencies up to 400 kHz. However, it's recommended to operate the device at a frequency of 100 kHz or less to ensure reliable operation and minimize power consumption.
• How do I handle the case where the battery voltage (VBAT) is lower than the supply voltage (VCC)?
  When VBAT is lower than VCC, the device will not switch to battery power. To handle this situation, consider using an external voltage detector or a power manager to ensure that the device operates correctly in this scenario.
• What is the purpose of the RST pin, and how should it be used?
  The RST pin is an active-low reset input that can be used to reset the device. It's recommended to tie the RST pin to VCC through a pull-up resistor to ensure that the device is not inadvertently reset. If a reset is required, the RST pin should be pulled low for a minimum of 100 ns.