The Arduino Uno SMD R3 is a version of the Arduino Uno but uses a surface-mount version of the Atmega328P instead of the through-hole version. This version was made in response to a shortage in supply of the through-hole Atmega328P. The board is based on the ATmega328 (datasheet). It consists of 14 digital input/output pins (of which six can be used as PWM outputs), six 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; connect it to a computer with a USB cable or power it with an 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.We can power up the Arduino Uno via the USB connection or with an external power supply. The board selects the power source automatically. No compatibility issue with Arduino UNO R3 program, expansion shields, IDE. The ATmega328 has 32 KB (with 0.5 KB used for the bootloader). It also has 2 KB of SRAM and 1 KB of EEPROM

Features of Arduino Uno SMD:

1. Direct by phone with Micro USB cable to the burning process:

2. Using Micro USB interface, compatible with more expansion boards:

3. USB to serial chip (CH340) supports win7 / win8 32bits, 64bits,Windows 10, Linux.


  1. Microcontroller ATmega328
  2. Operating Voltage 5V
  3. Input Voltage (recommended) 7-12V
  4. Input Voltage (limits) 6-20V
  5. Digital I/O Pins 14 (of which 6 provide PWM output)
  6. Analog Input Pins 6
  7. DC Current per I/O Pin 40 mA
  8. DC Current for 3.3V Pin 150 mA
  9. Flash Memory 32 KB (ATmega328) of which 0.5 KB used by bootloader SRAM
  10. 2 KB (ATmega328) EEPROM
  11. 1 KB (ATmega328)
  12. Clock Speed 16 MHz

Package includes:

  • 1x Arduino Uno SMD R3

Additional information

Weight 0.1 kg


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