Real-Time clock

• Module itself can adapt 3.3V and 5V systems
• Low-power and high accuracy
• Within -40 ° C to +85 ° C temperature range, timing accuracy is maintained at ± 5ppm (± 0.432 sec / day)
• Provide battery backup for continuous timing.
• Complete clock functions include seconds, minutes, hours, day, date, month and year timing, and provide valid for the whole XXI century.
• Two calendar alarm.