HK24C02 is an electrically erasable programmable read-only memory (EEPROM) it contains 256 x 8 bits of storage space with wide voltage a plurality of erase and write times writing speed etc. The device can be up to 8 simultaneous connections to a two-wire bus via the SDA (serial data line) and SCL (serial clock line) in the transmission of data between connected devices on the bus and according to the address identification of each device (such as MCU memory LCD driver and keyboard interface). HK24C02 using the CMOS floating gate technology built with high pressure pump can operate from a single supply voltage conditions. The memory erase can be repeated 1 trillion times and have 40 years of data saving function. A wide range of applications such as IC card CPU card decoding device encryption card video processing mobile communication computer automatic control system and other fields widely uses the I2C bus interface device