RTC backup

Backup of clock function with portable equipment etc.

  • RTC backup
  • MS Lithium Rechargeable Battery MS614SE
  • CMOS real time clock IC S-35390A
    Clock operating voltage: 1.3 to 5.5V, current consumption: 0.25μA
  • Quartz Crystal low CL resonator SSP-T7-FL
    CL=6.0pF, R1=65kΩ max.

Example of a recommended application circuit: for RTC backup

* This circuit diagram is a reference example. See the data sheet of each product before using it.

Example of RTC backup time, using MS414GE / MS614SE

* This graph is a rough indication. The operating time varies depending on the actual service conditions.