he Arduino Uno R3 SMD Atmega328P Board is an economical, high-performance microcontroller board built as a compact surface-mount alternative to the traditional DIP version. 5.0V DC logic level · 6V to 20V DC.
he Arduino Uno R3 SMD Atmega328P Board is an economical, high-performance microcontroller board built as a compact surface-mount alternative to the traditional DIP version. Powered by the Microchip ATmega328P-AU surface-mount (TQFP) microcontroller running at 16 MHz, this clone board offers 100% code, library, and shield compatibility with standard Arduino Uno R3 designs.
This SMD model utilizes the cost-effective CH340G USB-to-UART serial interface chip. A major hardware advantage of this variant is the inclusion of parallel breakout solder pads alongside the standard female headers, providing additional solder points for direct wire connections, sensor nodes, and custom headers.
The board can be powered via a USB Type-B cable, an external DC power adapter (7V to 12V DC) plugged into the onboard barrel jack, or unregulated supply on the V_IN pin. Featuring 14 digital I/O pins (6 offering hardware PWM), 6 analog input pins, reset button, and onboard status LEDs, it is an ideal choice for robotics, IoT prototyping, display interfaces, and smart home automation.
| Core Microcontroller | Microchip ATmega328P-AU Surface Mount IC (TQFP-32 package) @ 16 MHz |
|---|---|
| USB-to-Serial Chip | CH340G USB Interface (USB Type-B Port) |
| Operating Voltage | 5.0V DC logic level |
| Recommended Input Supply | 7V to 12V DC via DC barrel jack or V_IN pin |
| Limit Input Supply Voltage | 6V to 20V DC |
| Digital I/O Pins | 14 pins total (6 support 8-bit PWM output) |
| Analog Input Channels | 6 pins (A0 - A5) |
| Extra Breakout Holes | Dual-row solder holes adjacent to female headers for custom wiring |
| Flash Memory | 32 KB (0.5 KB utilized by bootloader) |
| SRAM / EEPROM | 2 KB SRAM / 1 KB EEPROM |
| Hardware Communication | Hardware UART (TX/RX), SPI, and I2C (SDA/SCL) |
What is the operating voltage?
5.0V DC logic level.
Which interface does it use?
Hardware UART (TX/RX), SPI, and I2C (SDA/SCL).
Is it compatible with Arduino?
Yes. It works with Arduino projects.
Can I buy the Arduino Uno R3 SMD Atmega328P Board in Kanpur?
Yes – buy online with delivery across India, or pick it up from the iTechBuilders store, Damodar Nagar, Kanpur.
