64Kbit non-volatile FRAM — what it means for the BOM
The FM25CL64B-GATR is a 64Kbit Ferroelectric RAM (FRAM) from Infineon's F-RAM™ series, organized as 8K x 8 bits and accessed over an SPI bus at up to 16 MHz. Unlike EEPROM or NOR flash, FRAM writes at bus speed with no page-buffer or erase-before-write penalty — each byte write completes in the same cycle as a read, and endurance is effectively unlimited at 10^14 write cycles typical for the technology.
Supply, temperature, and package — board-fit checklist
Runs on a 3V to 3.6V rail — the narrow supply window means it pairs cleanly with 3.3V logic domains but won't tolerate a 5V I/O bus without a level translator. Housed in an 8-SOIC (3.90mm width) — the standard narrow-body SOIC footprint that pick-and-place handles without special nozzles, and the MSL rating for this package class is typically MSL-1 (no bake required before reflow).
No pin-compatible drop-in replacement from Infineon is documented, so a BOM revision or second-source qualification may be needed for new builds.