APM32F103RBT6 — Geehy ARM Cortex-M3 MCU, 72MHz, 128KB flash, 20KB SRAM, LQFP64 Category: MCU Pricing LCSC $1.23 Mouser $1.57 DigiKey $1.51 Farnell $1.63 Manufacturer: https://www.geehy.com