ATmega32U4 — 8-Bit AVR Microcontroller with USB 2.0
Microchip (Atmel) 8-bit AVR RISC microcontroller featuring full-speed USB 2.0 controller, 32KB Flash, 2.5KB SRAM, 1KB EEPROM, and 12-channel ADC, powering Arduino Leonardo, Pro Micro, and custom mechanical keyboards.
Core8-bit AVR RISCMax Clock Speed16MHzatmega32u4avr
44-pin TQFP / 44-pin QFN / Arduino Leonardo / Pro Micro Board2026-08-09