GD32F103RBU6 — GigaDevice
ARM Cortex-M3 MCU, 72MHz, 128KB flash, 20KB SRAM, QFN64

Category: MCU

Pricing
  LCSC         $1.40
  Mouser       $1.81
  DigiKey      $1.78
  Farnell      $2.00

Manufacturer: https://www.gigadevice.com