What this FRAM replaces on your board
The FM24CL16B-G is a 16Kbit non-volatile memory from Infineon's F-RAM™ family, using ferroelectric storage instead of floating-gate cells. It talks I²C at up to 1 MHz and lives in a standard 8-SOIC footprint. The key difference from a serial EEPROM: no write-cycle limit. You can write to any address 10^14 times before the cell wears out, which makes it the part you pick when the system logs data every few seconds over a ten-year service life.
The 550 ns access time looks slow compared to a parallel SRAM, but this is a serial I²C part. The bus runs at 1 MHz, so each bit takes 1 µs; the access time is the internal fetch latency, not the bus cycle. If you are replacing a 24LCxx EEPROM running at 400 kHz, the FM24CL16B-G will feel faster because it does not need a page-write delay or a polling loop. The write completes in the same bus cycle as the data transfer — no 5 ms wait.
Supply and temperature — fits industrial and 3.3V logic
The I²C interface is 3.3 V logic compatible.