| Part Numbers | Manufacturer Name | Datasheet | Core Processor | Core Size | Speed | Connectivity | RAM Size | Number of I/O | Program Memory Size | Program Memory Type | EEPROM Size | Voltage - Supply (Vcc/Vdd) | Data Converters | Oscillator Type | Operating Temperature | Package / Case |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ATMEGA8U2-AU | ATMEL CORP | AVR | 8-Bit | 16MHz | SPI, UART/USART, USB | 22 | 8KB (4K x 16) | FLASH | 512 x 8 | 512 x 8 | 2.7 V ~ 5.5 V | - | Internal | -40°C ~ 85°C | 32-TQFP | |
| ATMEGA16U2-AU | ATMEL CORP | AVR | 8-Bit | 16MHz | SPI, UART/USART, USB | 22 | 16KB (8K x 16) | FLASH | 512 x 8 | 512 x 8 | 2.7 V ~ 5.5 V | - | Internal | -40°C ~ 85°C | 32-TQFP | |
| ATMEGA32U2-MU | ATMEL CORP | AVR | 8-Bit | 16MHz | SPI, UART/USART, USB | 22 | 32KB (16K x 16) | FLASH | 1K x 8 | 1K x 8 | 2.7 V ~ 5.5 V | - | Internal | -40°C ~ 85°C | 32-VFQFN Exposed Pad | |
| ATMEGA8U2-MU | ATMEL CORP | AVR | 8-Bit | 16MHz | SPI, UART/USART, USB | 22 | 8KB (4K x 16) | FLASH | 512 x 8 | 512 x 8 | 2.7 V ~ 5.5 V | - | Internal | -40°C ~ 85°C | 32-VFQFN Exposed Pad | |
| ATMEGA8U2-AUR | ATMEL CORP | AVR | 8-Bit | 16MHz | SPI, UART/USART, USB | 22 | 8KB (4K x 16) | FLASH | 512 x 8 | 512 x 8 | 2.7 V ~ 5.5 V | - | Internal | -40°C ~ 85°C | 32-TQFP | |
| ATMEGA16U2-MUR | ATMEL CORP | AVR | 8-Bit | 16MHz | SPI, UART/USART, USB | 22 | 16KB (8K x 16) | FLASH | 512 x 8 | 512 x 8 | 2.7 V ~ 5.5 V | - | Internal | -40°C ~ 85°C | 32-VFQFN Exposed Pad | |
| ATMEGA16U2-MU | ATMEL CORP | AVR | 8-Bit | 16MHz | SPI, UART/USART, USB | 22 | 16KB (8K x 16) | FLASH | 512 x 8 | 512 x 8 | 2.7 V ~ 5.5 V | - | Internal | -40°C ~ 85°C | 32-VFQFN Exposed Pad | |
| ATMEGA32U2-AU | ATMEL CORP | AVR | 8-Bit | 16MHz | SPI, UART/USART, USB | 22 | 32KB (16K x 16) | FLASH | 1K x 8 | 1K x 8 | 2.7 V ~ 5.5 V | - | Internal | -40°C ~ 85°C | 32-TQFP | |
| ATMEGA32U2-MUR | ATMEL CORP | AVR | 8-Bit | 16MHz | SPI, UART/USART, USB | 22 | 32KB (16K x 16) | FLASH | 1K x 8 | 1K x 8 | 2.7 V ~ 5.5 V | - | Internal | -40°C ~ 85°C | 32-VFQFN Exposed Pad | |
| ATMEGA32U2-AUR | ATMEL CORP | AVR | 8-Bit | 16MHz | SPI, UART/USART, USB | 22 | 32KB (16K x 16) | FLASH | 1K x 8 | 1K x 8 | 2.7 V ~ 5.5 V | - | Internal | -40°C ~ 85°C | 32-TQFP |
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