| PartNumber | AT90USB647-AUR | AT90USB647-MU | AT90USB647-AU |
| Description | 8-bit Microcontrollers - MCU 64K Flash; 2K EEPROM 4K SRAM; 48 IO Pins | 8-bit Microcontrollers - MCU AVR USB 64K FLSH-OTG 16MHz Ind Temp | 8-bit Microcontrollers - MCU AVR USB 64K FLSH-OTG 16MHz Ind Temp |
| Manufacturer | Microchip | Microchip | Microchip |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| RoHS | Y | Y | Y |
| Package / Case | TQFP-64 | QFN-64 | TQFP-64 |
| Series | AT90USB647 | AT90USB647 | AT90USB647 |
| Core | AVR | AVR | AVR |
| Data Bus Width | 8 bit | 8 bit | 8 bit |
| Operating Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Packaging | Reel | Tray | Tray |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | Microchip Technology / Atmel |
| Moisture Sensitive | Yes | Yes | Yes |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| Factory Pack Quantity | 1000 | 260 | 90 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Mounting Style | - | SMD/SMT | SMD/SMT |
| Maximum Clock Frequency | - | 16 MHz | 16 MHz |
| Program Memory Size | - | 64 kB | 64 kB |
| Data RAM Size | - | 4 kB | 4 kB |
| ADC Resolution | - | 10 bit | 10 bit |
| Number of I/Os | - | 48 I/O | - |
| Minimum Operating Temperature | - | - 40 C | - 40 C |
| Maximum Operating Temperature | - | + 85 C | + 85 C |
| Program Memory Type | - | Flash | Flash |
| Data RAM Type | - | SRAM | SRAM |
| Data ROM Size | - | 2 kB | 2048 B |
| Data ROM Type | - | EEPROM | EEPROM |
| Interface Type | - | SPI, TWI, USART | 2-Wire, SPI, UART |
| Number of ADC Channels | - | 8 | 8 |
| Number of Timers/Counters | - | 4 Timer | 4 Timer |
| Processor Series | - | AT90USBx | - |
| Supply Voltage Max | - | 5.5 V | 5.5 V |
| Supply Voltage Min | - | 2.7 V | 2.7 V |
| Unit Weight | - | 0.007277 oz | 0.012720 oz |