FRAM program memory — no wear-leveling required
The 64.5 KB of FRAM is the headline differentiator versus conventional Flash MCUs. FRAM writes at bus speed with no erase cycle, so the device can treat program memory almost like RAM — useful for over-the-air firmware updates, data logging with frequent writes, or storing calibration parameters that change during operation. There is no wear-leveling concern; FRAM endurance is orders of magnitude higher than Flash, so the firmware-update strategy can be simpler.
There is no official successor or second-source alternate cited in the record, so the BOM line should be specified with this exact order code. Compliance documentation such as RoHS and REACH declarations is available from the manufacturer upon request.