The STM32F77xNx 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 512 kB, Flash Memory 1024 to 2048 kB, Supply Voltage 1.7 to 3.6 V. Tags: Surface Mount. More details for STM32F77xNx can be seen below.