Real time clocks is embedded in the 20-SOIC (0.295, 7.50mm Width) package.Time clock is packaged in the way of Tube.The supply voltage of this electrical RTC is 1.8V~4.2V.The type of this electrical real time clock is Clock/Calendar.This real time clock (RTC) is mounted in the way of Surface Mount.The operating temperature should be -40°C~85°C.Alarm, Leap Year, Square Wave Output, SRAM, TCXO/Crystal, Watchdog Timer can be ensured when operating.It is equipped with 20 pins.RTCs belongs to PCF2127 family.The supply voltage of this electrical digital time clock is 1.8V~4.2V.The RTC times embed a memory of 512B available for storing programs and data.