| Part Numbers | Manufacturer Name | Datasheet | Core Processor | Core Size | Speed | Connectivity | RAM Size | Number of I/O | Program Memory Size | Program Memory Type | EEPROM Size | Voltage - Supply (Vcc/Vdd) | Data Converters | Oscillator Type | Operating Temperature | Package / Case |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ATMEGA328P-MU | ATMEL CORP | AVR | 8-Bit | 20MHz | I²C, SPI, UART/USART | 23 | 32KB (16K x 16) | FLASH | 1K x 8 | 2K x 8 | 1.8 V ~ 5.5 V | A/D 8x10b | Internal | -40°C ~ 85°C | 32-VFQFN Exposed Pad | |
| ATMEGA328P-AU | ATMEL CORP | AVR | 8-Bit | 20MHz | I²C, SPI, UART/USART | 23 | 32KB (16K x 16) | FLASH | 1K x 8 | 2K x 8 | 1.8 V ~ 5.5 V | A/D 8x10b | Internal | -40°C ~ 85°C | 32-TQFP | |
| ATMEGA328P-PU | ATMEL CORP | AVR | 8-Bit | 20MHz | I²C, SPI, UART/USART | 23 | 32KB (16K x 16) | FLASH | 1K x 8 | 2K x 8 | 1.8 V ~ 5.5 V | A/D 6x10b | Internal | -40°C ~ 85°C | 28-DIP (0.300, 7.62mm) | |
| ATXMEGA16D4-AU | ATMEL CORP | AVR | 8/16-Bit | 32MHz | I²C, IrDA, SPI, UART/USART | 34 | 16KB (8K x 16) | FLASH | 1K x 8 | 2K x 8 | 1.6 V ~ 3.6 V | A/D 12x12b | Internal | -40°C ~ 85°C | 44-TQFP | |
| ATXMEGA16D4-MH | ATMEL CORP | AVR | 8/16-Bit | 32MHz | I²C, IrDA, SPI, UART/USART | 34 | 16KB (8K x 16) | FLASH | 1K x 8 | 2K x 8 | 1.6 V ~ 3.6 V | A/D 12x12b | Internal | -40°C ~ 85°C | 44-VFQFN Exposed Pad | |
| ATMEGA328-AU | ATMEL CORP | AVR | 8-Bit | 20MHz | I²C, SPI, UART/USART | 23 | 32KB (16K x 16) | FLASH | 1K x 8 | 2K x 8 | 1.8 V ~ 5.5 V | A/D 8x10b | Internal | -40°C ~ 85°C | 32-TQFP | |
| ATMEGA324A-AUR | ATMEL CORP | AVR | 8-Bit | 20MHz | I²C, SPI, UART/USART | 32 | 32KB (16K x 16) | FLASH | 1K x 8 | 2K x 8 | 1.8 V ~ 5.5 V | A/D 8x10b | Internal | -40°C ~ 85°C | 44-TQFP | |
| ATXMEGA16A4U-MH | ATMEL CORP | AVR | 8/16-Bit | 32MHz | I²C, IrDA, SPI, UART/USART, USB | 34 | 16KB (8K x 16) | FLASH | 1K x 8 | 2K x 8 | 1.6 V ~ 3.6 V | A/D 12x12b, D/A 2x12b | Internal | -40°C ~ 85°C | 44-VFQFN Exposed Pad | |
| ATXMEGA16A4U-AU | ATMEL CORP | AVR | 8/16-Bit | 32MHz | I²C, IrDA, SPI, UART/USART, USB | 34 | 16KB (8K x 16) | FLASH | 1K x 8 | 2K x 8 | 1.6 V ~ 3.6 V | A/D 12x12b, D/A 2x12b | Internal | -40°C ~ 85°C | 44-TQFP | |
| ATMEGA328-PU | ATMEL CORP | AVR | 8-Bit | 20MHz | I²C, SPI, UART/USART | 23 | 32KB (16K x 16) | FLASH | 1K x 8 | 2K x 8 | 1.8 V ~ 5.5 V | A/D 6x10b | Internal | -40°C ~ 85°C | 28-DIP (0.300, 7.62mm) |
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