Specifications:

Its operating voltages are 5V.

Its input voltages are 7 to 12V.

Its input voltage is 6 to 20V.

Its digital pins are 54

Its analog input pins are 16.

The size of the DC current pin is 40mA.

3.3V for DC current pin 50mA.

Its flash memory is 256KB

Its SRAM is 8KB.

Its EEPROM is 4KB.

Its clock speed is 16MHz.