Microchip 25LC640T-I/SN, 64kbit EEPROM Chip, 500ns 8-Pin SOT-23 I2C, Serial-2 Wire

The Microchip 64 Kbit Serial Electrically Erasable PROM memory is accessed via a simple Serial Peripheral Interface (SPI) compatible serial bus. The bus signals required are a clock input plus separate data in and data out lines. Access to the device is controlled through a Chip Select input.

Write cycle time of 5 ms max
Self timed erase and write cycles
Block write protection
Power on/off data protection circuitry
Write enable latch
Write protect pin
Sequential read
High reliability