The 24AA128T-I/MS is a 256K bit (32K x 8) I2C Serial EEPROMs from Microchip. It has an operating voltage range of 1.7V to 5.5V, a write protection voltage of 2.5V to 5.5V, and a temperature range of -40°C to +125°C. Its features include an 8-pin SOIC package, an 8-byte page write capability, a 50kHz and 400kHz (max) I2C interface, and 4Kbit/8bit block lock protection. It is widely used in applications such as memory storage, low power serial interfaces, and energy harvesting.