Tiny RTC I2C Module

Specifications : 1. Using The DS1307 I2C Real Time Clock chips ( RTC) 2. I2C EEPROM memory 24C32 32K 3. To adopt LIR2032 rechargeable lithium battery, and with the charging circuit 4. Fix DS1307 Problem by adding backup battery. 5. Compact design, 27mm * 28mm * 8.4mm 6. Can be cascaded to other I2C devices. The DS1307 is a low power, with 56 bytes of non-volatile RAM, all the BCD code real-time clock calendar clock chip address and data transmission through the two-wire bidirectional serial bus, the chip provides seconds, minutes, hours and other information the number of days per month can be adjusted automatically. And there is a leap year compensation. AM / PM flag decision clock work 24 hours or 12 hours mode, the chip has a built-in power sensing circuit, power failure detection and battery switching function. DS1307 characteristics: Can be seconds, minutes, monthly number of days, months, days of the week, counting, and has a leap year compensation. 1. 56 bytes of non-volatile RAM 2. Two-wire serial interface 3. Programmable square wave output 4. Automatic power-down detection and switching circuit 5. In battery backup mode, power consumption is less than 500nA