Serial Access Real-Time Clock With Alarms

The M41T315Y M41T315V M41T315W RTC Supervisor is a combination of a CMOS TIMEKEEPER and a nonvolatile memory supervisor. Power is constantly monitored by the memory supervisor. In the event of power instability or absence, an external battery maintains the timekeeping operation and provides power for a CMOS static RAM by switching on and invoking write protection to prevent data corruption in the memory and RTC By STMicroelectronics