DS1339C-33 datasheet by Maxim Integrated Products

DS1339C-33 Frequently Asked Questions (FAQs)

• What is the recommended crystal oscillator frequency tolerance for the DS1339C-33?
  The recommended crystal oscillator frequency tolerance is ±20 ppm to ensure proper operation and minimize clock errors.
• How do I handle the battery switchover during power failure?
  The DS1339C-33 has an internal switchover circuit that automatically switches to the battery supply during power failure. Ensure that the battery is connected correctly and the VBAT pin is properly decoupled to prevent noise and voltage spikes.
• What is the maximum allowed voltage on the VCC pin during battery backup mode?
  The maximum allowed voltage on the VCC pin during battery backup mode is 5.5V to prevent damage to the internal circuitry.
• How do I reset the DS1339C-33 to its default state?
  The DS1339C-33 can be reset to its default state by pulling the RST pin low for at least 100 ns. This will reset the clock, alarm, and all registers to their default values.
• What is the purpose of the EOSC pin, and how do I use it?
  The EOSC (End-Of-Sleep) pin is an output that indicates when the device has completed its power-up sequence and is ready for operation. It can be used to trigger other circuits or devices to start their operation.