The STM32G491Cx from STMicroelectronics is a Space Qualified Microcontroller with Clock Rate 32 kHz to 48 MHz, Operating Frequency 170 MHz, Internal RAM Memory SRAM : 16 to 80 kB, Flash Memory 256 to 512 kB, Supply Voltage 1.71 to 3.6 V. Tags: Surface Mount. More details for STM32G491Cx can be seen below.