STM32F411CEU6 32bit ARM Cortex M4 MCU,512KB Flash 3.3V in a UFQFPN surface mount package by STMicroelectronics. Download STMicroelectronics STM32F411CEU6 datasheet: CEU6 : C=48 pin E=512K of Flash Memory U=UFQFPN (7 x 7mm) package 6= Temp range of -40 ~ 85ºC Status: NOS (New Old Stock) in sealed pack. RoHS Compliant: YES