DS1307 I2C Real Time Clock Chip (RTC)

24C32 32K I2C EEPROM memory

CR2032 rechargeable lithium battery with charging circuit

Solve the problem that the DS1307 cannot read or write with the backup battery.

After fully charged, it can provide DS1307 timing for 1 year.

Lead out the clock pin of DS1307 to provide the clock signal for the microcontroller.

Other I2C devices can be cascaded.

DS1307 is a low power consumption, full BCD code clock calendar real-time clock chip with 56 byte nonvolatile RAM. The address and data are transmitted through a two-wire bidirectional serial bus. The chip can provide seconds, minutes, hours and other information, and the days of each month can be automatically adjusted. It also has the function of leap year compensation. The AM/PM flag determines whether the clock works in the 24-hour or 12 hour mode. The chip has a built-in power sensing circuit with power failure detection and battery switching functions.

DS1307 features:

It can count seconds, hours, minutes, days of each month, months and days of each week, and has the leap year compensation function. 2100 will be launched every year.

56 byte nonvolatile RAM

Two wire serial interface

Programmable square wave output

Automatic power down detection and switching circuit

In battery backup mode, the power consumption is less than 500nA