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ATMEGA32U4-AU

MCHPATMEGA32U4-AU

Microchip Technology
AVR AVR® ATmega Microcontroller IC 8-Bit 16MHz 32KB (16K x 16) FLASH 44-TQFP (10x10)
NRND5,595 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The ATMEGA32U4-AU is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture, featuring 32KB of flash memory and a built-in USB 2.0 full-speed device module. Its integrated USB transceiver eliminates the need for external interface chips, making it a popular choice for compact peripherals and custom HID devices.

Why Choose This Part

The primary advantage is the integrated USB 2.0 full-speed/low-speed device module with a dedicated 832-byte DPRAM for endpoint management. This simplifies PCB design and reduces BOM cost by removing the necessity for an external USB controller, while the 44-pin TQFP package provides a versatile balance of GPIO and compact footprint.

Applications

Custom Keyboards and HID Devices
Utilizing the integrated USB 2.0 module to emulate keyboards, mice, or game controllers without external serial-to-USB converters.
USB-to-Serial Bridges
Creating custom data logging interfaces that require a direct, high-speed connection to a host PC.
Programmable Macros
Implementing specialized control surfaces for audio/video editing or gaming that require reliable USB HID communication.
Education and Prototyping
Serving as the core processor for development platforms like the Arduino Leonardo and Pro Micro.

Key Specifications

Speed 16MHz
RAM Size 2.5K x 8
Core Size 8-Bit
EEPROM Size 1K x 8
Peripherals Brown-out Detect/Reset, POR, PWM, WDT
Connectivity I2C, SPI, UART/USART, USB
Mounting Type Surface Mount
Number of I/O 26
Core Processor AVR
Package / Case 44-TQFP
Data Converters A/D 12x10b
Oscillator Type Internal
Program Memory Size 32KB (16K x 16)
Program Memory Type FLASH
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 44-TQFP (10x10)
Voltage - Supply (Vcc/Vdd) 2.7V ~ 5.5V

Getting Started

Developers can use the Microchip Studio (formerly Atmel Studio) or the Arduino IDE for software development. Hardware debugging is supported via the JTAG interface, and the chip's bootloader can be programmed to support firmware updates over USB using the DFU (Device Firmware Upgrade) protocol.

Part of ATmega family » ATMEGA32U

ATMEGA32U Family

Part NumberDifferenceStock
ATMEGA32U4-MU QFN 6,269
ATMEGA32U2-AU 2-AU 5,491
Also available as: ATMEGA32U4-AUR

Also Consider

ATSAMD21G18A-AU MCHPMicrochip Technology - Provides a more powerful 32-bit ARM Cortex-M0+ core and native USB support for more demanding applications.
ATMEGA328P-AU MCHPMicrochip Technology - A standard AVR choice for applications that do not require integrated USB hardware, offering lower power and cost.

Categories

Microcontrollers > AVR