NM24C09 - 8K-Bit Standard 2-Wire Bus Interface Serial EEPROM
The NM24C08/09 devices are 8192 bits of CMOS non-volatile electrically erasable memory.
These devices conform to all specifications in the Standard IIC 2-wire protocol and are designed to minimize device pin count, and simplify PC board layout requirements.
The upper half (upper 4Kbit) of the memory