ATMEGA644P-20MUR Description Datasheet Core Processor AVR Core Size 8-Bit Speed 20MHz Connectivity I?C SPI UART/USART Peripherals Brown-out Detect/Reset...

ATMEGA644P-20PQ Description Datasheet Core Processor AVR Core Size 8-Bit Speed 20MHz Connectivity I?C SPI UART/USART Peripherals Brown-out Detect/Reset...

ATMEGA644P-20PU Description Datasheet Core Processor AVR Core Size 8-Bit Speed 20MHz Connectivity I?C SPI UART/USART Peripherals Brown-out Detect/Reset...

ATMEGA644P-A15AZ Description Datasheet Core Processor AVR Core Size 8-Bit Speed 16MHz Connectivity I?C SPI UART/USART Peripherals Brown-out Detect/Reset...

ATMEGA644P-A15MZ Description Datasheet Core Processor AVR Core Size 8-Bit Speed 16MHz Connectivity I?C SPI UART/USART Peripherals Brown-out Detect/Reset...

ATMEGA644PA-ANR Description Datasheet Core Processor AVR Core Size 8-Bit Speed 20MHz Connectivity I?C SPI UART/USART Peripherals Brown-out Detect/Reset...

ATMEGA644PA-AU Description Datasheet Core Processor AVR Core Size 8-Bit Speed 20MHz Connectivity I?C SPI UART/USART Peripherals Brown-out Detect/Reset...

ATMEGA644PA-AUR Description Datasheet Core Processor AVR Core Size 8-Bit Speed 20MHz Connectivity I?C SPI UART/USART Peripherals Brown-out Detect/Reset...

ATMEGA644PA-MN Description Datasheet Core Processor AVR Core Size 8-Bit Speed 20MHz Connectivity I?C SPI UART/USART Peripherals Brown-out Detect/Reset...

ATMEGA644PA-MNR Description Datasheet Core Processor AVR Core Size 8-Bit Speed 20MHz Connectivity I?C SPI UART/USART Peripherals Brown-out Detect/Reset...

ATMEGA644PA-MU Description Datasheet Core Processor AVR Core Size 8-Bit Speed 20MHz Connectivity I?C SPI UART/USART Peripherals Brown-out Detect/Reset...

ATMEGA644PA-MUR Description Datasheet Core Processor AVR Core Size 8-Bit Speed 20MHz Connectivity I?C SPI UART/USART Peripherals Brown-out Detect/Reset...