STMicroelectronics Arm Cortex-M0+ MCU, USB, 256 KB flash, UFQFPN-48 (7 x 7 mm, 0.5 mm pitch). Datasheet-cited specs, KiCad, Fusion and Altium libraries and a 3D model.
stm32g0b1ccu7: review fixes: one ground pin per stacked pair ([2,4] style), lens-only LED glow, white SMA dielectric, SMA model turned to match the footprint