PCF8563 PCF8563T 8563 IIC I2C Interface Real Time Clock RTC Board Module Good than DS3231 AT24C32 3.3V For Arduino Raspberry Pi

???? The PCF8563 RTC Board provides the real-time clock/calendar function, which can be driven by a battery on board and works independently even when the MCU is turned off. Low-cost, extremely accurate I2C real-time clock (RTC) More steady and precise than DS1302 or DS1307 Support I2C bus cascade (by pin, row seat docking method, which can use multiple I2C module) Wide voltage range: 1.0-5.5V Typical value: 0.25uA Output frequency: 32.768KHz, 1024Hz, 32Hz, 1Hz 4 kinds of real-time clock/calendar functions ? ? Package includes: ? 1x PCF8563 RTC Board 1x Pin header ? Pls Note:There is no battery in this package ?? ? ? ?? ???