GD32F103ZEU6 — GigaDevice ARM Cortex-M3 MCU, 72MHz, 512KB flash, 64KB SRAM, QFN144 Category: MCU Pricing LCSC $3.03 Mouser $3.49 DigiKey $3.96 Farnell $4.05 Manufacturer: https://www.gigadevice.com