Specifications of Arduino Mega ATmega 2560 Board

Microcontroller       :     ATmega2560
Operating Voltage  :      5V
Input Voltage (recommended): 7-12V
Input Voltage (limits)     : 6-20V
Digital I/O Pins      :       54 (of which 15 provide PWM output)
Analog Input Pins  :      16
DC Current per I/O Pin   :  40 mA
DC Current for 3.3V Pin  : 50 mA
Flash Memory        :       256 KB of which 8 KB used by bootloader
SRAM                     :        8 KB
EEPROM               :       4 KB
Clock Speed           :      16 MHz
USB Host Chip    :      MAX3421E
Length                     :      101.98mm/4.01"
Width                      :       53.63mm/2.11"
Height                     :      15.29mm/0.60"