STM32G431CBU6

STM32G431CBU6 is an STMicroelectronics STM32G4-series Arm Cortex-M4 microcontroller in UFQFPN-48 (7 × 7 × 0.55 mm), tray packing — 128 KB Flash (the CB density), 32 KB SRAM and a core running up to 170 MHz with the family's motor-control and digital-power peripheral set, on a 1.71 to 3.6 V supply, rated −40 to +85 °C. The package is the selection point against the STM32G431CBT6 on this site: same family and density in an LQFP-48, while this CBU6 code is the smaller UFQFPN footprint — the two are not drop-in interchangeable on a laid-out board. ST's Sample & Buy table lists this exact orderable code with Marketing Status ACTIVE (volume production), which settles the code's status at the maker. Selection advice: the trailing 6 is the −40 to +85 °C ambient grade — the 125 °C sibling grade is a different code, so do not let a hotter-rated variant be substituted silently, and match the full STM32G431CBU6 string, since the G431 family spans several densities and packages that share the base name. Parameters verified against the ST product page and the official ST estore record.