DS1343E-33+ datasheet by Maxim Integrated Products

DS1343E-33+ Frequently Asked Questions (FAQs)

• What is the recommended power-up sequence for the DS1343E-33+?
  The recommended power-up sequence is to apply VCC first, followed by VBAT. This ensures that the internal voltage regulators are powered up correctly.
• How do I ensure that the DS1343E-33+ oscillator starts reliably?
  To ensure reliable oscillator startup, make sure that the crystal oscillator circuit is properly terminated, and the crystal is of high quality. Also, ensure that the oscillator input pins (XTI and XTO) are not loaded with excessive capacitance.
• What is the maximum allowed voltage on the VBAT pin?
  The maximum allowed voltage on the VBAT pin is 3.6V. Exceeding this voltage may damage the device.
• Can I use the DS1343E-33+ with a battery voltage below 2.0V?
  No, the DS1343E-33+ is not designed to operate with a battery voltage below 2.0V. The device may not function correctly or may be damaged if the battery voltage falls below 2.0V.
• How do I prevent the DS1343E-33+ from consuming excessive current during power-down?
  To prevent excessive current consumption during power-down, ensure that all inputs are at a valid logic level (either VCC or GND) and that no inputs are floating. Also, ensure that the oscillator is disabled during power-down.