The 25LC256T-E/SN16KV18 is a 256 Kbit Serial EEPROM from Microchip. It is a 3 V device, with SPI communication interface, with a write-protect pin for hardware data protection. It supports page write up to 32 bytes, and has an endurance of 1 million write cycles. It has a standby current of 0.1uA and active current of 1 mA. It has a temperature range of -40°C to +85°C, and an operational voltage from 1.8 V to 3.6 V. The chips comes in 8-pin PDIP, SOIC, and TSSOP packages. It is an industrial grade, UL recognized component.