Микросхема DS1307ZN+, Часы реального времени, будильник, ОЗУ 56-бит …

DS1307ZN+, Часы реального времени, будильник, ОЗУ 56-бит …Real Time Clock with NV Memory, Integrated
A range of real-time clock products from Maxim incorporating non-volatile RAM memory for data retention. The clock/calendar functions provide seconds, minutes, hours, day, date, month, and year information. The clocks generally operate in either the 12 or 24-hour format with an AM/PM indicator. Additional features may include watchdog timers, alarms and trickle-charging facilities for external back-up batteries