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| PartNumber | ATMEGA324P-20MQR | ATMEGA324P-20MQ | ATMEGA324P-20MCU |
| Description | 8-bit Microcontrollers - MCU AVR 32KB FLSH 1KB EE 2KB SRAM-20MHz EXT5V | 8-bit Microcontrollers - MCU AVR 32KB 1KB EE 20MHz 2KB SRAM 5V | IC MCU 8BIT 32KB FLASH 44QFN |
| Manufacturer | Microchip | Microchip | - |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | - |
| RoHS | Y | Y | - |
| Package / Case | VQFN-44 | VQFN-44 | - |
| Series | ATmega324P | ATmega324P | - |
| Core | AVR | AVR | - |
| Data Bus Width | 8 bit | 8 bit | - |
| Maximum Clock Frequency | 20 MHz | 20 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 | 360 | - |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | - |
| Tradename | AVR | AVR | - |
| Mounting Style | - | SMD/SMT | - |
| Program Memory Size | - | 32 kB | - |
| Data RAM Size | - | 2 kB | - |
| Number of I/Os | - | 32 I/O | - |
| Minimum Operating Temperature | - | - 40 C | - |
| Maximum Operating Temperature | - | + 85 C | - |
| Height | - | 0.88 mm | - |
| Length | - | 7 mm | - |
| Program Memory Type | - | Flash | - |
| Width | - | 7 mm | - |
| Data RAM Type | - | SRAM | - |
| Data ROM Size | - | 1 kB | - |
| Data ROM Type | - | EEPROM | - |
| Interface Type | - | 2-Wire, JTAG, SPI, USART | - |
| Number of Timers/Counters | - | 3 Timer | - |
| Supply Voltage Max | - | 5.5 V | - |
| Supply Voltage Min | - | 2.7 V, 4.5 V | - |