The CAT25256YI-GT3 is an EEPROM manufactured by ON Semiconductor. It is a 256K SPI Serial CMOS EEPROM. This EEPROM is a high speed, low power, 8-pin memory device offering capacity of 32K, 64K, 128K and 256K with CMOS technology. With its dual address pointer architecture, read access time from the memory is fast, making it ideal for use in applications with long idle times. Its access time is as low as 15µs and its low power consumption makes it suitable for power restricted applications. The device is organized as 32K words with 8 bits per word and is accessed via a 3-wire serial interface. It is also available with a unique ID feature, allowing for improved system security. Additionally, the CAT25256YI-GT3 has high tolerance to noise, with an operating temperature range from -40° to 85° degrees Celsius.