The 24AA04/SN is a 4 Kbit I2C serial EEPROM manufactured by Microchip Technology Inc. It has a 2-wire Serial Interface, a write protect pin and a 2.5 - 5.5V operating voltage range. It is a low-voltage, low-power device, and is optimized for use in consumer, industrial and automotive applications. The device is available in a range of package options and is capable of up to 1 MHz communications speed. It meets the most stringent requirements for endurance, reliability and data retention.