| PartNumber | ATMEGA1281V-8AU | ATMEGA1281V-8MU | ATMEGA1281V-8AUR |
| Description | 8-bit Microcontrollers - MCU 128kB Flash 4kB EEPROM 54 I/O Pins | 8-bit Microcontrollers - MCU 128kB Flash 4kB EEPROM 54 I/O Pins | 8-bit Microcontrollers - MCU 128K FL 8K SRAM 4KB EE 8MHZ IND 1.8V |
| Manufacturer | Microchip | Microchip | Microchip |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| RoHS | Y | Y | Y |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | TQFP-64 | MLF-64 | QFN-64 |
| Series | ATmega128x | ATmega128x | ATmega128x |
| Core | AVR | AVR | AVR |
| Data Bus Width | 8 bit | 8 bit | 8 bit |
| Maximum Clock Frequency | 8 MHz | 8 MHz | 8 MHz |
| Program Memory Size | 128 kB | 128 kB | 128 kB |
| Data RAM Size | 8 kB | 8 kB | 8 kB |
| ADC Resolution | 10 bit | 10 bit | 10 bit |
| Number of I/Os | 54 I/O | 54 I/O | 54 I/O |
| Operating Supply Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Packaging | Tray | Tray | Reel |
| Height | 1 mm | 0.95 mm | - |
| Length | 14 mm | 9 mm | - |
| Product | MCU | MCU | MCU |
| Program Memory Type | Flash | Flash | - |
| Width | 14 mm | 9 mm | - |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | Microchip Technology / Atmel |
| Data RAM Type | SRAM | SRAM | - |
| Data ROM Size | 4 kB | 4 kB | - |
| Data ROM Type | EEPROM | EEPROM | - |
| Interface Type | 2-Wire, SPI, USART | 2-Wire, SPI, USART | - |
| Moisture Sensitive | Yes | - | Yes |
| Number of ADC Channels | 8 | 8 | 8 |
| Number of Timers/Counters | 6 Timer | 6 Timer | 6 Timer |
| Processor Series | megaAVR | megaAVR | megaAVR |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| Factory Pack Quantity | 90 | 260 | 1000 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Supply Voltage Max | 5.5 V | 5.5 V | - |
| Supply Voltage Min | 1.8 V | 1.8 V | - |
| Tradename | AVR | AVR | AVR |
| Unit Weight | 0.012720 oz | 0.371999 oz | 0.007277 oz |