FRAM-based 16-bit MCU for low-power sensing and control
Its standout feature is 15.5 KB of FRAM program memory—non-volatile storage that writes at near-SRAM speed with essentially unlimited endurance, eliminating the wear-leveling overhead needed with Flash. The device integrates 2K x 8 of RAM, an 8-channel 10-bit ADC, and serial interfaces including I²C, SPI, and UART.
Why FRAM matters for the BOM
FRAM combines the non-volatility of Flash with the write speed and low power of SRAM. For the MSP430FR2533IRHBT, this means the 15.5 KB program memory can be written byte-by-byte at full bus speed without erase cycles, making it ideal for frequent data logging, configuration updates, or over-the-air firmware patches. The 2K x 8 RAM handles stack and scratchpad variables. The 19 general-purpose I/O pins, plus the internal oscillator, reduce external component count—a brown-out detect and POR are on-chip, so the BOM can skip an external supervisor IC in many designs.
Package and footprint
Housed in a 32-VFQFN exposed-pad package (5x5 mm body), the MSP430FR2533IRHBT is a surface-mount device. The supplier device package is 32-VQFN (5x5).