131-0290, Microchip, Microchip ATMEGA32U4-MU, 8bit AVR Microcontroller, ATmega, 16MHz, 32 kB Flash, 44-Pin QFN, Brand Microchip, Family Name ATmega, Package Type QFN Microchip ATMEGA32U4-MU, 8bit AVR Microcontroller, ATmega, 16MHz, 32 kB Flash, 44-Pin QFN