Adafruit fram breakout i2c non volatile 256kbit 32kbyte adafruit 1895 p the adafruit i2c non volatile 256kbit 32kbyte fram breakout gives your next project fast persistent storage using cool new ferroelectric ram technology it s low power has a fast write speed and each location can be written to 10 trillion times once written data will be kept safe for 95 years at room temperature though there may not be arduinos then the i2c interface runs at 1mhz and the board is happy with 3