RV-8523-C3 is a CMOS real time clock / calendar optimized for low power consumption. Data is transferred serially via an I²C bus with a maximum data rate of 1000 kbit/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. The RV-8523 has a backup battery switch-over circuit, which detects power failures and automatically switches to  the battery supply when a power failure occurs.


  • Low power consumption: 130 nA @ 3 V
  • Wide operating voltage range: 1.2 V to 5.5 V.
  • Automatic Backup Switchover function.
  • Time accuracy: ±20 ppm @ 25°C.
  • User programmable offset value.
  • I²C-bus interface: 1 MHz Fast-mode Plus (Fm+)
  • Provides year, month, date, weekday, hours, minutes and seconds
  • Timer, Alarm and Watchdog functions.
  • Clock output frequencies: 32.768 kHz to 1 Hz.

Block Diagram


The RV-8523-C3 RTC module is ideal for 

  • IoT
  • Wearables, Portables
  • Health Care
  • Metering
  • Industrial 
  • Automotive


Ordering Information