The DS1302 is a trickle charge clock chip from DALLAS that contains a real-time clock / calendar and 31 bytes of static RAM to communicate with the microcontroller through a simple serial interface. R..

DS1307 Real Time Clock RTC I2C 24C32 Memory ModuleThis is the Real Time Clock (RTC) Module, this little breakout that uses the DS1307 to keep track of the current year, month, day as well as the curre..

DS3231 Real Time Clock Module IIC AT24C32 Precision Module High Accuracy I2C DS3231 Real Time Clock Module with 32Kbit EEPROM and built-in 10 bit temperature sensor having resolution of 0.25C.The..