GD32F103RBT6R — GigaDevice ARM Cortex-M3 MCU, 72MHz, 128KB flash, 20KB SRAM, LQFP64, tape & reel, 2500 pcs Category: MCU Pricing LCSC $1.61 Mouser $1.97 DigiKey $2.15 Farnell $2.27 Manufacturer: https://www.gigadevice.com