| PartNumber | ATMEGA324PB-AN | ATMEGA324PB-ANR | ATMEGA324PB-AU |
| Description | 8-bit Microcontrollers - MCU 20MHZ, TQFP, Extended TEMP, GREEN 5 V | 8-bit Microcontrollers - MCU 20MHZ,TQFP, Extended TEMP, GREEN 5 V T&R | 8-bit Microcontrollers - MCU 20MHZ, TQFP, IND TEMP, GREEN 5 V |
| 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-44 | TQFP-44 | TQFP-44 |
| Series | ATmega324PB | ATmega324PB | ATmega324PB |
| 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 | - |
| Data RAM Size | 2 kB | 2 kB | 2 kB |
| ADC Resolution | 10 bit | 10 bit | 10 bit |
| Number of I/Os | 39 I/O | 39 I/O | 39 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 | + 105 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 | 2-Wire, I2C, SPI, USART | 2-Wire, SPI, UART | I2C, SPI, USART |
| Analog Supply Voltage | 5.8 V | - | 1.8 V to 5.5 V |
| Moisture Sensitive | Yes | Yes | Yes |
| Number of ADC Channels | 8 Channel | 8 Channel | 8 Channel |
| Number of Timers/Counters | 2 x 8 bit, 3 x 16 bit | 5 Timer | 2 x 8 bit/3 x 16 bit |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| Factory Pack Quantity | 160 | 2000 | 160 |
| 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 | Watchdog Timer |
| Unit Weight | - | - | 0.009640 oz |