ARM Cortex-M4 at 80 MHz — what the core speed buys you
The STM32L431CCT6TR: 80 MHz core speed supports real-time control loops such as motor commutation and sensor fusion.
The 48-LQFP package (7x7 mm) with 39 I/O fits space-constrained PCBs where a smaller QFN might be too fine-pitch for manual rework.
The 10x12-bit ADC and 2x12-bit DAC handle analog front-end tasks without an external converter. Brown-out detect, DMA, PWM, and a watchdog are built in, reducing external supervisor IC count.
The STM32L431CCT6TR is the Tape & Reel (TR) variant of the base STM32L431CCT6, which ships in trays. Electrically and footprint-identical, the TR suffix is purely a packaging difference for automated pick-and-place assembly. The same part in Cut Tape (CT) is also listed under this order code for smaller-volume builds.
The active status means no last-time-buy planning is needed for current designs.