The 25C320T-I/SN is a Microchip Serial EEPROM (Electrically Erasable Programmable Read-Only Memory) device. It is a 32 Kb (4K x 8) static RAM, organized as a 256K x 8 device with an SPI (Serial Peripheral Interface) protocol. This device operates from 2.7V to 5.5V, has a write protect pin, low power CMOS technology, and is available in 8-pin SOIC, PDIP, and 8-pin space-saving package. It has 10 years of data retention, low power consumption, industry standard pin-out, and over 1M write endurance cycles. This part is RoHS, Lead (Pb)-Free and Halogen-Free.