| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AT90USB646-AU | ATMEL CORP | AVR | 8-Bit | 16MHz | EBI/EMI, I²C, SPI, UART/USART, USB, USB OTG | 48 | 64KB (64K x 8) | FLASH | 2K x 8 | 4K x 8 | 2.7 V ~ 5.5 V | A/D 8x10b | Internal | -40°C ~ 85°C | 64-LQFP | |
| AT90USB646-AUR | ATMEL CORP | AVR | 8-Bit | 16MHz | EBI/EMI, I²C, SPI, UART/USART, USB, USB OTG | 48 | 64KB (64K x 8) | FLASH | 2K x 8 | 4K x 8 | 2.7 V ~ 5.5 V | A/D 8x10b | Internal | -40°C ~ 85°C | 64-LQFP | |
| AT90USB1287-AU | ATMEL CORP | AVR | 8-Bit | 16MHz | EBI/EMI, I²C, SPI, UART/USART, USB, USB OTG | 48 | 128KB (128K x 8) | FLASH | 4K x 8 | 8K x 8 | 2.7 V ~ 5.5 V | A/D 8x10b | Internal | -40°C ~ 85°C | 64-LQFP | |
| AT90USB1287-AUR | ATMEL CORP | AVR | 8-Bit | 16MHz | EBI/EMI, I²C, SPI, UART/USART, USB, USB OTG | 48 | 128KB (128K x 8) | FLASH | 4K x 8 | 8K x 8 | 2.7 V ~ 5.5 V | A/D 8x10b | Internal | -40°C ~ 85°C | 64-LQFP | |
| AT90USB1287-16AUR | ATMEL CORP | AVR | 8-Bit | 16MHz | EBI/EMI, I²C, SPI, UART/USART, USB, USB OTG | 48 | 128KB (128K x 8) | FLASH | 4K x 8 | 8K x 8 | 2.7 V ~ 5.5 V | A/D 8x10b | Internal | -40°C ~ 85°C | 64-LQFP |
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