RX8900CE Series 3 V 32.768 kHz 3.2 x 2.5 mm SMT I2C-BUS Real Time Clock Module
Real Time Clock Serial Clock/Calendar/Alarm 10-Pin T/R
I2C-BUS RTC +/-3.4PPM-40~85C 10 PIN 250TR
IC RTC CLK/CALENDAR I2C 10-SMD