Atmega328P Board R3 SMD – Compatible Model

The UNO R3 SMD uses a surface-mount ATmega328 microcontroller, making it functionally identical to the through-hole (DIP) version but harder to swap without hot-air rework.fastbitembedded+1​

Key Specifications

It operates at 5V with a recommended 7-12V DC input, features 14 digital I/O pins (6 PWM), 6 analog inputs, 32 KB flash (0.5 KB bootloader), 2 KB SRAM, 1 KB EEPROM, and a 16 MHz clock. Each I/O pin handles up to 40 mA, with 50 mA on the 3.3V pin.sigmaelectronica+2​

Comparison to CP2102 Version

Unlike the CP2102 variant discussed previously, the SMD model focuses on the soldered ATmega328 package rather than USB chip differences, offering the same pinout and Arduino IDE compatibility for your automation prototyping needs. Both support USB power and shields, but SMD suits production where chip replacement isn’t needed.