The 93C66A-I/P is an 8-pin Serial EEPROM manufactured by Microchip. This device can store up to 64-bits of data, which can be read and written using a 1-Wire serial interface. The 93C66A-I/P comes with internal power-on, write-protection, hold, write-restrict, and sector-protection features, making it a secure and stable storage device. With a wide voltage range from 2.7V up to 5.5V and temperatures from -55°C up to +125°C, the 93C66A-I/P is a cost-effective solution for applications needing reliable and secure data storage for a low cost.