The STM32L443Rx from STMicroelectronics is a Space Qualified Microcontroller with Clock Rate 32 kHz to 48 MHz, Operating Frequency 80 MHz, Internal RAM Memory SRAM : 64 kB, Flash Memory 256 kB, Supply Voltage 1.71 to 3.6 V. Tags: Surface Mount. More details for STM32L443Rx can be seen below.