FRAM that writes like SRAM, remembers like Flash
The Cypress FM24V01A-G is a 128Kbit non-volatile FRAM (Ferroelectric RAM) memory in an 8-pin SOIC, communicating over I2C at up to 3.4 MHz.
At 3.4 MHz (the high-speed I2C mode), the bus clock period is about 294 ns, so the FRAM keeps up without inserting wait states. For a system that polls a sensor every millisecond and logs 16 bytes per sample, the write completes in roughly 45 µs including overhead — versus 5 ms for a page write on a comparable EEPROM. That difference matters when the MCU has other real-time tasks to service between samples.
Operating from 2.0 V to 3.6 V, this part works on both 3.3 V and 2.5 V rails with headroom. The 8-SOIC footprint is a direct drop-in for many serial EEPROM sockets, though verify the pinout — FRAM uses the same I2C pin arrangement as standard 24-series EEPROMs.