Arduino UNO R3 CH340G ATmega328(SMD)

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SKU: 58685
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Description

Arduino Uno R3 Development Board (Without Cable)

Microcontroller Chip
 ATmega328 (SMD) 
Operating Voltage
5V
Input Voltage (recommended)
7-12V
Input Voltage (limit)
6-20V
Digital I/O Pins
14 (of which 6 provide PWM output)
PWM Digital I/O Pins
6
Analog Input Pins
6
Clock Speed
16 MHz.
SRAM
2 KB (ATmega328)
EEPROM
1 KB (ATmega328P)
Operating Temperature (°C)
-40 to +90
Power Supply 
via DC Jack or USB
Arduino UNO Datasheet  Datasheet Link

The Arduino UNO SMD R3 is a version of Arduino UNO, but it uses a surface mount version of Atmega328P instead of the through-hole version. The board is based on Atmega328. The ATmega328 provides UART TTL (5V) serial communication, which is available on digital pins 0 (RX) and 1 (TX). A CH340G on the board channels this serial communication over USB and appears as a virtual com port to software on the computer. 

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