The STM32U535CB/CC/CE from STMicroelectronics is a Space Qualified Microcontroller with Clock Rate 32 kHz to 50 MHz, Operating Frequency 160 MHz, Internal RAM Memory SRAM : 272 kB, Flash Memory 128 KB, Supply Voltage 1.71 to 3.6 V. Tags: Surface Mount. More details for STM32U535CB/CC/CE can be seen below.