The 72 MHz core, paired with the single-cycle multiply and hardware divide of the Cortex-M3, gives you deterministic interrupt latency for motor-control PWM or CAN message handling without a separate co-processor.
The on-chip peripherals include DMA, multiple PWM channels with dead-time insertion for motor control, a temperature sensor, and a full set of watchdogs (PDR, POR, PVD).
64-TFBGA — footprint and assembly considerations
The 64-TFBGA (5x5 mm) package saves board area compared to an LQFP64, but it demands a multi-layer PCB for fanout — you can't route all 51 I/O on a two-layer board without blind vias.
STMicroelectronics lists the STM32F103RBH7 as Active. The base product number is STM32F103, so PCNs and errata are published under that umbrella — worth subscribing to if you're shipping volume.