72 MHz Cortex-M3 with Ethernet — the connected-control workhorse
The STM32F107RCT7: Integrated Ethernet MAC and USB OTG controller. On-chip peripherals include CAN, multiple SPI/I²C/UART, two 12-bit DACs, and a 16-channel 12-bit ADC.
256 KB program Flash. 64 KB SRAM.
ST has not issued a PCN or last-time-buy notice for this part. For new designs, there is no forced migration window; for existing BOMs, the supply chain is stable. The part is ROHS3 compliant. No exemption or transition concerns for EU or global markets.
Package and footprint — 64-LQFP (10x10 mm)
Housed in a 64-lead LQFP with a 10x10 mm body and 0.5 mm pitch. The exposed pad is not present on this package variant — thermal dissipation goes through the leadframe only. For continuous operation above 85°C ambient with all peripherals active, ensure adequate airflow or a heatsink on the top face. The 51 I/O lines include 5 V-tolerant inputs, useful for interfacing to legacy 5 V logic without level shifters.