Arduino UNO R3 User Manual

Arduino® UNO R3
13 / 13 Arduino® UNO R3 / Rev. 01 - 25/11/2021
Important: The operating temperature of the EUT can’t exceed 85℃ and shouldn’t be lower than -40℃.
Hereby, Arduino S.r.l. declares that this product is in compliance with essential requirements and other relevant
provisions of Directive 2014/53/EU. This product is allowed to be used in all EU member states.
8 Company Information
Company name Arduino S.r.l
Company Address Via Andrea Appiani 25 20900 MONZA Italy
9 Reference Documentation
Reference Link
Arduino IDE
(Desktop)
https://www.arduino.cc/en/Main/Software
Arduino IDE (Cloud) https://create.arduino.cc/editor
Cloud IDE Getting
Started
https://create.arduino.cc/projecthub/Arduino_Genuino/getting-started-with-arduino-
web-editor-4b3e4a
Arduino Pro Website https://www.arduino.cc/pro
Project Hub https://create.arduino.cc/projecthub?by=part&part_id=11332&sort=trending
Library Reference https://www.arduino.cc/reference/en/
Online Store https://store.arduino.cc/
10 Revision History
Date Revision Changes
xx/06/2021 1 Datasheet release

Arduino UNO R3 Specifications

General

Microcontroller	ATmega328P
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
DC Current per I/O Pin	20 mA
DC Current for 3.3V Pin	50 mA
Flash Memory	32 KB (ATmega328P) of which 0.5 KB used by bootloader
SRAM	2 KB (ATmega328P)
EEPROM	1 KB (ATmega328P)
Clock Speed	16 MHz
LED_BUILTIN	13
Length	68.6 mm
Width	53.4 mm
Weight	25 g