The GD32F405RGT6 is GigaDevice's pin-compatible replacement for the STM32F405RGT6 — featuring the same ARM Cortex-M4 at 168 MHz, 1MB Flash, 192KB SRAM, and identical LQFP-64 footprint. It is widely used in cost-sensitive drone production where direct board substitution is required without PCB redesign.
GD32 chips are approved and used in Betaflight F405 targets by many FC manufacturers. The GD32F405 typically offers 20–40% cost reduction versus the STM32F405, with comparable electrical performance for flight controller applications at 168MHz.
Comparison vs STM32F405RGT6
- Same LQFP-64 package — direct board drop-in
- Same core architecture — Cortex-M4 FPU at 168MHz
- Same peripheral mapping — UART, SPI, I2C, CAN identical
- Lower cost — significant savings on high-volume production
- Note: Higher minimum supply voltage (2.6V vs 1.8V on STM32)