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  Home >> Development Kit >> Arduino Board >> Arduino Uno Rev3 - based on the ATmega328
Arduino Uno Rev3 - based on the ATmega328 Add to favorites

Manufacturer Arduino Team
Product Order Code Arduino_Uno_Rev3
Product DataSheet No Datasheet
Price: $29.00
Quantity 1-29pcs 30-99pcs 100-499pcs 500-999pcs
Price $29.00 $28.00 $27.00 $26.00
Arduino Uno Rev3, Arduino Uno is a microcontroller board based on the ATmega328.


The Arduino Uno Rev3 is a microcontroller board based on the ATmega328 (datasheet). It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button. 
It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started. 
The Uno differs from all preceding boards in that it does not use the FTDI USB-to-serial driver chip. Instead, it features the Atmega8U2 programmed as a USB-to-serial converter."Uno" means one in Italian and is named to mark the upcoming release of Arduino 1.0.  
The Uno and version 1.0 will be the reference versions of Arduno, moving forward. The Uno is the latest in a series of USB Arduino boards, and the reference model for the Arduino platform.


  • 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
  • Length    68.6 mm
  • Width    53.4 mm
  • Weight    25 g

Schematic & Reference Design

EAGLE files: (NOTE: works with Eagle 6.0 and newer)

Schematic: arduino-uno-Rev3-schematic.pdf

Note: The Arduino reference design can use an Atmega8, 168, or 328, Current models use an ATmega328, but an Atmega8 is shown in the schematic for reference. The pin configuration is identical on all three processors.

Packing List

1 x Arduino Uno Board

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