39186FM 24C64 B-G FM24C64B-GFM24C64B-GCypress FRAM series FM24.
ferroelectric nonvolatile RAMs
in an SO8 housing
suitable as a direct replacement of I²C EEPROMs
write up to 500 times faster than EEPROMs
up to 38 years data retention (at +75°C)
operating temperature: -40 to +85°C
supply voltage: 4,5 to 5,5V