Arduino Uno R3 SMD
Official Arduino Uno R3 SMD – ATmega328P + ATmega16U2 USB, Rev3 Pinout (SDA/SCL/IOREF) | 16MHz, 32KB Flash The Official Arduino Uno Rev3 SMD is the genuine Arduino-manufactured edition of the...
Read MoreSKU:ARD-015
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Official Arduino Uno R3 SMD – ATmega328P + ATmega16U2 USB, Rev3 Pinout (SDA/SCL/IOREF) | 16MHz, 32KB Flash
The Official Arduino Uno Rev3 SMD is the genuine Arduino-manufactured edition of the world's most popular microcontroller board, featuring the ATmega328P in a surface-mount package and an ATmega16U2 for rock-solid USB-to-serial conversion. The Rev3 pinout adds dedicated SDA, SCL, and IOREF pins for improved I2C and shield compatibility. Running at 16MHz via ceramic resonator with 32KB flash (31.5KB usable), 2KB SRAM, and 1KB EEPROM, it supports 14 digital I/O pins (6 PWM) and 6 analog inputs — everything needed to power from USB or a 7–12V adapter and start building immediately.
- Official Arduino board – manufactured and quality-controlled by Arduino, not a clone
- ATmega328P SMD – surface-mount controller for a lower profile and improved vibration resistance
- ATmega16U2 USB interface – reliable, low-latency USB-to-serial for programming and serial monitor
- Rev3 pinout – dedicated SDA, SCL, and IOREF pins for seamless I2C and 3.3V/5V shield compatibility
- 14 digital I/O, 6 PWM – control motors, servos, LEDs, relays, and displays
- 6 analog inputs – 10-bit ADC for sensors, potentiometers, and signal reading
- 16MHz ceramic resonator – cost-effective, stable oscillator for consistent timing
- Dual power input – USB or 7–12V DC jack; onboard regulator handles the rest
Ideal Applications
- Prototyping with the full Arduino shield and library ecosystem
- Educational electronics, STEM labs, and classroom coding
- Robotics, servo control, and autonomous systems
- IoT sensors, home automation, and data logging
- AVR microcontroller learning and embedded programming
- Permanent installations requiring an official, quality-verified board
Technical Specifications
| Feature | Specification |
| Microcontroller | ATmega328P (SMD) |
| USB Interface | ATmega16U2 |
| Clock Speed | 16 MHz (ceramic resonator) |
| Flash Memory | 32KB (0.5KB used by bootloader) |
| SRAM | 2KB |
| EEPROM | 1KB |
| Operating Voltage | 5V DC |
| Input Voltage | 7–12V (recommended), 6–20V (limit) |
| Digital I/O Pins | 14 (6 with PWM output) |
| Analog Input Pins | 6 |
| DC Current per I/O Pin | 20mA |
| DC Current (3.3V Pin) | 50mA |
| Pinout | Rev3 – with SDA, SCL, IOREF pins |
| Onboard LED | LED_BUILTIN on pin 13 |
| Connectivity | USB Type-B, DC barrel jack, ICSP header, reset button |
What's in the Box
- Official Arduino Uno R3 SMD Microcontroller Board × 1
Note: This is the official Arduino-manufactured board. USB cable and power supply are not included. The SMD ATmega328P is soldered directly and cannot be removed without desoldering.
