The STM32F746Nx from STMicroelectronics is a Space Qualified Microcontroller with Clock Rate 32 kHz to 26 MHz, Operating Frequency 216 MHz, Internal RAM Memory SRAM : 4 to 320 kB, Flash Memory 512 to 1024 kB, Supply Voltage 1.7 to 3.6 V. Tags: Surface Mount. More details for STM32F746Nx can be seen below.