Part number
Core
Max speed
Flash
Ram
I/O
Package
M0
48MHz
16Kb
4Kb
27
UFQFPN32/LQFP32
STM32F051K6
32Kb
STM32F051K8
64Kb
8Kb
STM32F051C4
39
LQFP48
STM32F051C6
4KB
STM32F051C8
8KB
STM32F051R4
55
LQFP64
STM32F051R6
STM32F051R8
STM32F050K4
STM32F050K6
STM32F050C4
STM32F050C6