DS1347T+ datasheet by Maxim Integrated Products

DS1347T+ Frequently Asked Questions (FAQs)

• What is the recommended crystal oscillator frequency for the DS1347T+?
  The recommended crystal oscillator frequency for the DS1347T+ is 32.768 kHz, which is a standard frequency for real-time clocks.
• How does the DS1347T+ handle battery switchover during power failure?
  The DS1347T+ has an internal switchover circuit that automatically switches to the backup battery during power failure, ensuring continuous operation of the real-time clock.
• What is the maximum backup battery life for the DS1347T+?
  The maximum backup battery life for the DS1347T+ depends on the battery type and capacity, but typically ranges from 5 to 10 years, assuming a 48mAh battery and a 1mA current drain.
• Can the DS1347T+ be used in a system with multiple power domains?
  Yes, the DS1347T+ can be used in a system with multiple power domains, as it has a separate power input for the real-time clock (VCC) and the battery (VBAT), allowing it to operate independently of the system power domain.
• How does the DS1347T+ handle clock accuracy over temperature?
  The DS1347T+ has an internal temperature compensation circuit that ensures clock accuracy over a wide temperature range (-40°C to +85°C), with a typical accuracy of ±2 minutes per year.