STM32C551VET6

STM32C551VET6 is an STMicroelectronics STM32C5 mainstream microcontroller in an LQFP-100 package, built on an Arm Cortex-M33 core with FPU and DSP instructions at 144 MHz, with 512 KB of dual-bank Flash, 128 KB of SRAM, an I3C port, two 12-bit ADCs reaching 4.5 MSPS interleaved and USB 2.0 full-speed. The 100-pin package exposes the family's full I/O set (up to 86 GPIO). Selection advice: note two limits before designing in - the supply floor is 2.7 V, not the 1.7 V of the G0/G4 families, and FDCAN is only on the STM32C552, not this 551; pick the VET6 when you need maximum I/O in the family, or the 48-pin CE code for small boards. ST announced the STM32C5 series entering production in March 2026 and the eStore lists this code as Active. Parameters verified against ST documentation.