The STM32F205Zx from STMicroelectronics is a Space Qualified Microcontroller with Clock Rate 32 kHz to 26 MHz, Operating Frequency 120 MHz, Internal RAM Memory SRAM : 4 to 128 kB, Flash Memory 256 to 1024 kB, Supply Voltage 1.8 to 3.6 V. Tags: Surface Mount. More details for STM32F205Zx can be seen below.