UNO R3 ATMEGA16U2+MEGA328P Chip for Arduino UNO R3 Development Board + USB Cable

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

Microcontroller:ATmega328P Operating Voltage:5V Input Voltage (recommended):7-12V Input Voltage (limit):6-20V Digital I/O Pins:14 (of which 6 provide PWM output) PWM Digital I/0 Pins:6 Analog Input Pins:6 DC Current per I/O Pin:20mA DC Current for 3.3V Pin:50mA Flash Memory:32 KB (ATmega328P) of which 0.5 KB used by bootloader SRAM:2 KB (ATmega328P) EEPROM:1 KB (ATmega328P) Clock Speed:16 MHz LED_ BUILTIN:13 Length:68.6 mm Width:53.4 mm