BUY DS1010-500 https://www.utsource.net/itm/p/1726052.html
10-Tap Silicon Delay Line
Description: The DS1010-500 is a 16-pin DIP (Dual Inline Package) CMOS (Complementary Metal-Oxide Semiconductor) real-time clock/calendar IC (Integrated Circuit) manufactured by Dallas Semiconductor. Features: Low power consumption Operating voltage range of 2.2V to 5.5V Programmable clock/calendar with leap year compensation Programmable alarm Programmable square wave output Battery backup I2C and SPI interface Applications: The DS1010-500 is used in applications requiring accurate timekeeping, such as digital clocks, watches, and other timekeeping devices. It is also used in applications that require periodic events, such as alarms, reminders, and other scheduling tasks. (For reference only)