| PartNumber | ATMEGA325A-ANR | ATMEGA325A-AU | ATMEGA325A-AN |
| Description | 8-bit Microcontrollers - MCU AVR 32K FL 2K SRAM 1KB EE 20MHz 105C | 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 105C |
| 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 | TQFP-64 | TQFP-64 |
| Series | ATmega325A | ATmega325A | ATmega325A |
| 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 | 1 kB | 2 kB | 1 kB |
| 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 | + 105 C | + 85 C | + 105 C |
| Packaging | Reel | Tray | Tray |
| Product | MCU | MCU | MCU |
| Program Memory Type | Flash | Flash | Flash |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | Microchip Technology / Atmel |
| Data RAM Type | EEPROM | SRAM | EEPROM |
| Interface Type | SPI | JTAG, SPI, USART | SPI |
| Processor Series | megaAVR | megaAVR | megaAVR |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| Factory Pack Quantity | 1000 | 90 | 90 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Tradename | AVR | AVR | AVR |
| Mounting Style | - | SMD/SMT | - |
| ADC Resolution | - | 10 bit | - |
| Data ROM Size | - | 1 kB | - |
| Data ROM Type | - | EEPROM | - |
| Moisture Sensitive | - | Yes | Yes |
| Number of ADC Channels | - | 8 | - |
| Number of Timers/Counters | - | 3 Timer | - |
| Supply Voltage Max | - | 5.5 V | - |
| Supply Voltage Min | - | 1.8 V | - |
| Unit Weight | - | 0.012720 oz | - |