| PartNumber | ATMEGA325-16MUR | ATMEGA325-16MU | ATMEGA325-16MI |
| Description | 8-bit Microcontrollers - MCU AVR 32K FLSH 1K EE2K SRAM ADC 5V-20MHZ | 8-bit Microcontrollers - MCU AVR 32K FLASH 1K EE 2K SRAM ADC 5V 5V | IC MCU 8BIT 32KB FLASH 64QFN |
| Manufacturer | Microchip | Microchip | - |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | - |
| RoHS | Y | Y | - |
| Package / Case | VQFN-64 | QFN-64 | - |
| Series | ATmega325 | ATmega325 | - |
| Core | AVR | AVR | - |
| Data Bus Width | 8 bit | 8 bit | - |
| Maximum Clock Frequency | 16 MHz | 16 MHz | - |
| Operating Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | - |
| Packaging | Reel | Tray | - |
| Product | MCU | MCU | - |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | - |
| Processor Series | megaAVR | megaAVR | - |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | - |
| Factory Pack Quantity | 4000 | 260 | - |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | - |
| Tradename | AVR | AVR | - |
| Mounting Style | - | SMD/SMT | - |
| Program Memory Size | - | 32 kB | - |
| Data RAM Size | - | 2 kB | - |
| ADC Resolution | - | 10 bit | - |
| Number of I/Os | - | 54 I/O | - |
| Minimum Operating Temperature | - | - 40 C | - |
| Maximum Operating Temperature | - | + 85 C | - |
| Height | - | 0.88 mm | - |
| Length | - | 9 mm | - |
| Program Memory Type | - | Flash | - |
| Width | - | 9 mm | - |
| Data RAM Type | - | SRAM | - |
| Data ROM Size | - | 1 kB | - |
| Data ROM Type | - | EEPROM | - |
| Interface Type | - | SPI, USART, USI | - |
| Number of ADC Channels | - | 8 | - |
| Number of Timers/Counters | - | 3 Timer | - |
| Supply Voltage Max | - | 5.5 V | - |
| Supply Voltage Min | - | 2.7 V | - |
| Unit Weight | - | 0.007277 oz | - |