The STM32WB15CCU from STMicroelectronics is a Space Qualified Microcontroller with Clock Rate 32 kHz to 32 MHz, Operating Frequency 64 MHz, Internal RAM Memory SRAM : 48 kB, Flash Memory 320 KB, Supply Voltage 1.71 to 3.6 V. Tags: Surface Mount. More details for STM32WB15CCU can be seen below.