The STM32L552ZE/ STM32L552ZExxQ, STM32L552ZCxxQ from STMicroelectronics is a Space Qualified Microcontroller with Clock Rate 32 kHz to 48 MHz, Operating Frequency 110 MHz, Internal RAM Memory SRAM : 128 kB, Flash Memory 256 to 512 kB, Supply Voltage 1.71 to 3.6 V. Tags: Surface Mount. More details for STM32L552ZE/ STM32L552ZExxQ, STM32L552ZCxxQ can be seen below.