Technical specification of Mega2560 R3 mainboard ATMEGA16U2-MU: 

1. Material: PCB board

2. Controller: ATmega2560
3. Working voltage: 5V
4. Input voltage: 7~12V
5. Voltage range: 6~20V
6. Digital ports: 54 (15 PWM output ports)
7. Analog ports: 16
8. IO port output current: 40mA
9. 3.3V power supply output current: 50mA
10. Flash: 256 KB of which 8 KB used by boot loaded
11. SRAM: 8KB
12. EEPROM: 4KB
13. Crystal: 16MHz

This board is very common used together with RAMPS 1.4 board, stpper driver and LCD for RepRap 3d printer.

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