The BR24S256FJ-WE2 is a 256kB 2-wire I2C bus Electrically Erasable Programmable Read-Only Memory (EEPROM) with fast mode 400KHz at 1.7 to 5.5V. It features single power source operation most suitable for battery use. It is also features all controls available by 2 ports of serial clock (SCL) and serial data (SDA) and other devices than EEPROM can be connected to the same port, saving microcontroller port.
Page write mode useful for initial value write at factory shipment
