I2C real time clock chip (RTC) 24C32 32K I2C EEPROM memory LIR2032 use rechargeable lithium battery, and with a charging circuit blem solving DS1307 with battery backup can not read and write. When fully charged, it can vide the DS1307 timing 1 year. Compact design, 27mm * 28mm * 8.4mm Leads DS1307 clock pin, vides a clock signal to the microcontroller
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