Arduino Uno SMD Rev3

Specifications for Arduino Uno SMD Rev3

• Microcontroller: ATmega328
• Operating Voltage: 5V
• Input Voltage (recommended): 7-12V
• Digital I/O Pins: 14
• PWM Digital I/O Pins: 6
• Analog Input Pins: 6
• DC Current per I/O Pin: 40 mA
• DC Current for 3.3V Pin: 50 mA
• Flash Memory: 32 KB
• Flash Memory for Bootloader: 0.5 KB
• SRAM: 2 KB
• EEPROM: 1 KB
• Clock Speed: 16 MHz
• Length: 68.6 mm
• Width: 53.4 mm

Features of Arduino Uno SMD Rev3

• The Uno is the latest in a series of USB Arduino boards, and the reference model for the Arduino platform
• It is a microcontroller board based on the ATmega328
• Contains everything needed to support the microcontroller
• 14 digital input/output pins (of which 6 can be used as PWM outputs)
• 6 analog inputs
• 16 MHz crystal oscillator
• USB connection
• A power jack
• ICSP header
• A reset button
• Differs from all preceding boards in that it does not use the FTDI USB-to-serial driver chip
• Additional features of the R3 version are:
  • ATmega16U2 instead 8U2 as USB-to-Serial converter
  • Added SDA and SCL pins for TWI communication placed near to the AREF pin
  • Two other new pins placed near to the Reset pin:
    • The IOREF that allow the shields to adapt to the voltage provided from the board
    • Second pin is a not connected, reserved for future purposes
  • Stronger Reset circuit