M41T81 Serial access real-time clock with alarm .
STMicroelectronics
M41T81S - Serial access real-time clock
M41T81S Serial access real-time clock (RTC) with alarms Features ■ Counters for tenths/hundredths of seconds, seconds, minutes, hours, day, date, mo.
ST Microelectronics
M41T81 - Serial access real-time clock
M41T81 Serial access real-time clock with alarm 8 1 SO8 8-pin SOIC Features For all new designs use M41T81S Counters for tenths/hundredths of se.