The MSP430FR59891IPMR is listed as Obsolete, despite an earlier 'current' lifecycle flag. Production has ended; no last-time-buy window remains. This part is available only through surplus and independent distribution channels. For a new design or a production line that needs a guaranteed supply, an official replacement should be identified.
128 KB FRAM — the key differentiator
This MCU uses 128 KB of FRAM (ferroelectric RAM) for program memory, backed by 2 KB of conventional SRAM. FRAM combines non-volatility with fast write speeds and near-infinite endurance — no wear-leveling needed for frequent data logging or configuration updates. The 16-bit CPUXV2 core runs at 16 MHz, enough for sensor fusion, metering, or low-power control loops.
An integrated 12-channel, 12-bit ADC handles analog inputs. The internal oscillator reduces external component count.
Supply and temperature range
Packaged in a 64-LQFP (10×10 mm) surface-mount package.