Microchip’s 24AA04/24LC04B family of devices are 4 Kbit I²C™ Serial EEPROMs available in a variety of package, temperature and power supply variants.

Single Supply with Operation down to 1.7V for 24AA04 devices, 2.5V for 24LC04B devices
Low-Power CMOS Technology: Read current 1 mA (typical), Standby current 1 μA (typical)
2-Wire Serial Interface, I2C™ Compatible
Schmitt Trigger inputs for Noise Suppression
Output Slope Control to eliminate Ground Bounce
100 kHz and 400 kHz Clock Compatibility
Page Write Time 3 ms (typical)
Self-Timed Erase/Write Cycle
16-Byte Page Write Buffer
Hardware Write-Protect
ESD Protection >4,000V
More than 1 Million Erase/Write Cycles
Data Retention >200 Years

EEPROM Serial Access - Microchip