What is it?

The module is a real-time clock module and calendar optimized for low power consumption, data is transferred serially via an I2C-Bus with a maximum data rate of 1000kbit/s. alarm and timer functions are available with the possibility to generate a wake-up signal on an interrupt pin. an offset register allows fine-tuning of the clock.

Details

• Recommended Supply Voltage and I/O Level: 3.3 ~ 5.5 VDC.
• Provides year, month, day, weekday, hours, minutes, and seconds based on a 32.768 kHz quartz crystal.
  
• Resolution: seconds to years.
  
• Freely programmable timer and alarm with interrupt capability.
  
• Select-able integrated oscillator load capacitors for CL = 7 pF or CL = 12.5 pF.
  
• Programmable offset register for frequency adjustment.
  
• Sufficient to run over 30 days, without providing power condition.
• Module size: 19 x 13mm.
  
• Device PIN Description:
  • PIN1: GND.
  • PIN2: VCC.
  • PIN3: SDA (Built-in Pull-up Resistor, to cancel via jumper).
  • PIN4: SCL (Built-in Pull-up Resistor, to cancel via jumper).
  • PIN5: INT (Built-in Pull-up Resistor, to cancel via jumper).
  • Pin to Pin Pitch: 2.54 mm / 0.1 in.
• Before it is shipped without any electricity storage, the first time you use it, please connect the power 24 hours or more.
  
• No need to buy batteries for it.