| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ATMEGA649V-8AU | ATMEL CORP | AVR | 8-Bit | 8MHz | SPI, UART/USART, USI | 53 | 64KB (32K x 16) | FLASH | 2K x 8 | 4K x 8 | 1.8 V ~ 5.5 V | A/D 8x10b | Internal | -40°C ~ 85°C | 64-TQFP | |
| ATMEGA649A-MU | ATMEL CORP | AVR | 8-Bit | 16MHz | SPI, UART/USART, USI | 54 | 64KB (32K x 16) | FLASH | 2K x 8 | 4K x 8 | 1.8 V ~ 5.5 V | A/D 8x10b | Internal | -40°C ~ 85°C | 64-TQFP | |
| ATMEGA645P-AU | ATMEL CORP | AVR | 8-Bit | 16MHz | SPI, UART/USART, USI | 54 | 64KB (32K x 16) | FLASH | 2K x 8 | 4K x 8 | 1.8 V ~ 5.5 V | A/D 8x10b | Internal | -40°C ~ 85°C | 64-TQFP | |
| ATMEGA649P-AU | ATMEL CORP | AVR | 8-Bit | 16MHz | SPI, UART/USART, USI | 54 | 64KB (32K x 16) | FLASH | 2K x 8 | 4K x 8 | 1.8 V ~ 5.5 V | A/D 8x10b | Internal | -40°C ~ 85°C | 64-TQFP | |
| ATMEGA645-16MU | ATMEL CORP | AVR | 8-Bit | 16MHz | SPI, UART/USART, USI | 53 | 64KB (32K x 16) | FLASH | 2K x 8 | 4K x 8 | 2.7 V ~ 5.5 V | A/D 8x10b | Internal | -40°C ~ 85°C | 64-VFQFN Exposed Pad | |
| ATMEGA649V-8MU | ATMEL CORP | AVR | 8-Bit | 8MHz | SPI, UART/USART, USI | 53 | 64KB (32K x 16) | FLASH | 2K x 8 | 4K x 8 | 1.8 V ~ 5.5 V | A/D 8x10b | Internal | -40°C ~ 85°C | 64-VFQFN Exposed Pad | |
| ATMEGA649-16MU | ATMEL CORP | AVR | 8-Bit | 16MHz | SPI, UART/USART, USI | 53 | 64KB (32K x 16) | FLASH | 2K x 8 | 4K x 8 | 2.7 V ~ 5.5 V | A/D 8x10b | Internal | -40°C ~ 85°C | 64-VFQFN Exposed Pad | |
| ATMEGA6450-16AU | ATMEL CORP | AVR | 8-Bit | 16MHz | SPI, UART/USART, USI | 68 | 64KB (32K x 16) | FLASH | 2K x 8 | 4K x 8 | 2.7 V ~ 5.5 V | A/D 8x10b | Internal | -40°C ~ 85°C | 100-TQFP | |
| ATMEGA6450V-8AU | ATMEL CORP | AVR | 8-Bit | 8MHz | SPI, UART/USART, USI | 68 | 64KB (32K x 16) | FLASH | 2K x 8 | 4K x 8 | 1.8 V ~ 5.5 V | A/D 8x10b | Internal | -40°C ~ 85°C | 100-TQFP | |
| ATMEGA6450A-AUR | ATMEL CORP | AVR | 8-Bit | 20MHz | SPI, UART/USART, USI | 69 | 64KB (32K x 16) | FLASH | 2K x 8 | 4K x 8 | 1.8 V ~ 5.5 V | A/D 8x10b | Internal | -40°C ~ 85°C | 100-TQFP |
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