What this STM32F105R8T6TR brings to the BOM
Typical applications include industrial control nodes, building automation gateways, and embedded systems where a single MCU handles both a USB host port and a CAN bus.
The STM32F105R8T6TR is an active product with no last-time-buy notice. The 64-LQFP package is shared across the STM32F105 series, allowing a BOM swap to a higher-density variant without a PCB change.
Package and mounting — the 64-LQFP footprint
The 51 available I/O lines are distributed across the four sides of the package; pay attention to the supply pin pairs (VDD/VSS) when laying out the decoupling — the datasheet recommends a 100 nF ceramic per pair plus a bulk capacitor on the main 3.3 V rail.