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ATMEGA8U2-AU

MCHPATMEGA8U2-AU

Microchip Technology
Older/lighter USB-enabled AVR with similar use as a USB bridge on legacy designs.
NRND6,093 in stock
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Overview

The ATMEGA8U2-AU is a low-power 8-bit AVR RISC-based microcontroller featuring 8KB of self-programmable flash memory and a dedicated USB 2.0 full-speed device module. It is frequently utilized as a high-performance USB-to-serial bridge or a lightweight HID controller in legacy embedded systems. The integration of an on-chip 48MHz PLL allows for full-speed USB data transfer rates up to 12 Mbit/s without an external high-frequency crystal.

Why Choose This Part

The part features a dedicated 176-byte DPRAM for USB endpoints and supports up to 16 MIPS throughput at 16MHz. Its hardware-based USB module simplifies the implementation of complex protocols like CDC and HID compared to bit-banged software solutions.

Applications

USB-to-UART Bridge
Acting as an interface between a host PC and a secondary microcontroller lackng native USB support.
HID Peripheral Controller
Implementing keyboards, mice, or custom joysticks using the integrated USB 2.0 module.
Legacy Arduino Programmers
Serving as the communication co-processor for board programming and serial debugging tasks.

Key Specifications

Speed 16MHz
RAM Size 512 x 8
Core Size 8-Bit
EEPROM Size 512 x 8
Peripherals Brown-out Detect/Reset, POR, PWM, WDT
Connectivity SPI, UART/USART, USB
Mounting Type Surface Mount
Number of I/O 22
Core Processor AVR
Package / Case 32-TQFP
Oscillator Type Internal
Program Memory Size 8KB (4K x 16)
Program Memory Type FLASH
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 32-TQFP (7x7)
Voltage - Supply (Vcc/Vdd) 2.7V ~ 5.5V

Getting Started

Develop firmware using Microchip Studio or the AVR-GCC toolchain and flash the device via the ISP interface. The LUFA (Lightweight USB Framework for AVRs) library is highly recommended for implementing USB classes on this specific hardware.

Part of ATmega family » ATMEGA8U

ATMEGA8U Family

Part NumberDifferenceStock
ATMEGA8U2-MU QFN 1,113

Also Consider

ATMEGA16U2-AU MCHPMicrochip Technology - Provides double the flash memory (16KB) for more complex USB descriptors and application logic.
MCP2221A MCHPMicrochip Technology - A dedicated USB-to-UART/I2C bridge that requires no firmware programming for simple interfacing tasks.
ATSAMD11D14A MCHPMicrochip Technology - A modern 32-bit ARM Cortex-M0+ alternative with native USB and higher performance at a similar price point.

Categories

Interface ICs > USB Interface ICs Microcontrollers > AVR