UNO R3 DIP IC Official Box ATMEGA16U2+MEGA328P Chip

Microcontroller ATmega328

   Operating Voltage 5V

   Input Voltage (recommended) 7-12V

   Input Voltage (limits) 6-20V

   Digital I/O Pins 14 (of which 6 provide PWM output)

   Analog Input Pins 6

   DC Current per I/O Pin 40 mA

   DC Current for 3.3V Pin 50 mA

   Flash Memory 32 KB (ATmega328) of which 0.5 KB used by bootloader

   SRAM 2 KB (ATmega328)

   EEPROM 1 KB (ATmega328)

   Clock Speed 16 MHz