72 MHz Cortex-M4 with FPU in a 5×5 mm QFN
This is a value-line density tier — the 32 KB Flash suits firmware-constrained control loops, sensor fusion, and motor commutation tasks where the Cortex-M4's DSP extensions and floating-point unit save you from software emulation overhead.
Peripheral set for industrial and mixed-signal control
On-chip data converters give you eight 12-bit ADC channels and one 12-bit DAC, so you can read analog sensors and output an analog setpoint without external converters.
What the 72 MHz and 32 KB Flash mean for your BOM
The 72 MHz Cortex-M4 core with FPU is the key differentiator from lower-cost Cortex-M0 or M3 parts in the same footprint — you get hardware floating-point and DSP instructions for FOC motor control, digital power conversion, or audio processing without a separate DSP. The 32 KB Flash and 16 KB SRAM are the fit check: if your firmware binary exceeds 32 KB, you step up to the 64 KB or 128 KB Flash variants in the same STM32F302 family.
The 32-UFQFPN (5×5 mm) with exposed pad is a compact, low-profile package suited for space-constrained PCBs. Under a hot-air station, preheat the board to 120°C before lifting; the small QFN body heats quickly, and the exposed pad wicks solder away from the perimeter joints if the profile is too aggressive.