The hardware floating-point unit (FPU) and DSP instructions let it run motor-control FOC loops, digital power-supply compensators, or audio processing without a separate DSP or external analog compute block. The 512 KB Flash and 112K x 8 RAM are sized for a single firmware image with room for bootloader and OTA staging — enough for most mixed-signal control designs without stepping up to the 1 MB density tier.
Analog front end in one package
With 32 channels of 12-bit ADC and four 12-bit DAC channels, this part can sample multiple current-sense resistors, voltage dividers, and temperature sensors while generating analog setpoints or reference waveforms — all on-chip. That reduces the external analog BOM to a handful of decoupling caps and anti-alias filters.
80-LQFP — routing and thermal reality
The 80-LQFP (12x12 mm) package with 66 I/O gives enough pins to bring out all the CAN, I²C, SPI, UART, and USB interfaces without needing a larger BGA. Surface-mount assembly is straightforward with standard reflow profiles.
Lifecycle and supply posture
The base product number STM32G491 covers multiple density and package variants, so a pin-compatible drop-in like the STM32G491RET6 (same 80-LQFP, same peripherals, 512 KB Flash) is a valid second-source candidate for dual-sourcing or supply resilience — not because this part is obsolete, but because having a second order code on the AVL reduces single-source risk.