The STM32F038Kx from STMicroelectronics is a Space Qualified Microcontroller with Clock Rate 32 kHz to 32 MHz, Operating Frequency 48 MHz, Internal RAM Memory SRAM : 4 kB, Flash Memory 32 kB, Supply Voltage 1.8 to 3.6 V. Tags: Surface Mount. More details for STM32F038Kx can be seen below.