170 MHz Cortex-M4 with mixed-signal peripherals — the G4 mid-density workhorse
The STM32G491CEU3: It targets real-time control applications — motor drives, digital power supplies, and industrial sensors — where the combination of a floating-point unit, a 19-channel 12-bit SAR ADC, and a four-channel 12-bit DAC reduces external analog components.
Peripheral set — CAN, USB, QSPI, and multiple serial interfaces
The QSPI interface supports external Flash or RAM expansion for data logging or over-the-air staging. The USB peripheral handles device-mode communication without an external PHY on the full-speed lines. For multi-protocol gateway designs, the three UART/USART channels and one CANbus node cover most industrial bus bridging needs.
Package and thermal — 48-UFQFPN with exposed pad
The 42 available I/Os are enough for sensor-fusion or motor-control feedback lines without needing a larger package.
Lifecycle — active, no end-of-life concern for new designs
For a production BOM, this means no immediate risk of obsolescence-driven redesign.