You can find real time clocks in package 20-SOIC (0.295, 7.50mm Width) among the other packages that are available.Tape & Reel (TR) is the way time clock is packaged, which is the way time clock is intended to be.It requires a voltage of 3V~6V to be supplied.Electrical real time clocks of type Clock/Calendar are involved.This electronic component has been mounted in the way of Surface Mount.In order to be safe, electronic time clocks are imperative that the temperature are kept at -40°C~85°C at all times.When a command are executed, electronic time clocks are possible to maintain Alarm, Leap Year, Square Wave Output, Watchdog Timer in order to maintain the current state.A transmission line with 20 terminations possesses the characteristic impedance of the RTC module terminating it.RTC real time clocks like this have a 5V supply voltage.The RTCs are equipped with the necessary features due to its 20 pins.This electrical digital time clock's supply voltage is 2.2V~6V.In the real time analog clocks, the available memory size is 32B.The frequency of real time clocks' output should not be higher than 4.1943MHz.Following an input signal, there are 1 timers that output a signal at a preset time.