| PartNumber | ATMEGA329PA-MU | ATMEGA329PA-AUR | ATMEGA329PA-AU |
| Description | 8-bit Microcontrollers - MCU AVR 32K FL 2K SRAM 1KB EE 20MHz Ind Grn | 8-bit Microcontrollers - MCU AVR 32K FLSH 2K SRAM 1KB EE-20MHz IND | 8-bit Microcontrollers - MCU AVR 32K FL 2K SRAM 1KB EE 20MHz Ind Grn |
| 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 | QFN-64 | TQFP-64 | TQFP-64 |
| Series | ATmega329PA | ATmega329PA | ATmega329PA |
| Core | AVR | AVR | AVR |
| Data Bus Width | 8 bit | 8 bit | 8 bit |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz |
| Program Memory Size | 32 kB | 32 kB | 32 kB |
| Data RAM Size | 2 kB | 2 kB | 2 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 | Reel | Tray |
| Product | MCU | MCU | MCU |
| Program Memory Type | Flash | Flash | Flash |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | Microchip Technology / Atmel |
| Data RAM Type | SRAM | SRAM | SRAM |
| Data ROM Size | 1 kB | 1 kB | 1 kB |
| Data ROM Type | EEPROM | EEPROM | EEPROM |
| Interface Type | SPI, USART | SPI, USART | I2C, SPI, UART |
| Moisture Sensitive | Yes | Yes | Yes |
| Number of ADC Channels | 8 Channel | 8 Channel | 8 |
| Number of Timers/Counters | 2 x 8 bit, 1 x 16 bit | 2 x 8 bit, 1 x 16 bit | 3 Timer |
| Processor Series | megaAVR | megaAVR | megaAVR |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| Factory Pack Quantity | 260 | 1000 | 90 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Supply Voltage Max | 5.5 V | 5.5 V | 5.5 V |
| Supply Voltage Min | 1.8 V | 1.8 V | 1.8 V |
| Tradename | AVR | AVR | AVR |
| Watchdog Timers | Watchdog Timer | Watchdog Timer | - |
| Unit Weight | - | - | 0.012720 oz |