Arduino UNO R3 User Manual

Arduino® UNO R3
5 / 13 Arduino® UNO R3 / Rev. 01 - 25/11/2021
2.2 Power Consumption
Symbol Description Min Typ Max Unit
VINMax Maximum input voltage from VIN pad 6 - 20 V
VUSBMax Maximum input voltage from USB connector - 5.5 V
PMax Maximum Power Consumption - - xx mA
3 Functional Overview
3.1 Board topology
Top view
Board topology
Ref. Description Ref. Description
X1 Power jack 2.1x5.5mm U1 SPX1117M3-L-5 Regulator
X2 USB B Connector U3 ATMEGA16U2 Module
PC1 EEE-1EA470WP 25V SMD Capacitor U5 LMV358LIST-A.9 IC
PC2 EEE-1EA470WP 25V SMD Capacitor F1 Chip Capacitor, High Density
D1 CGRA4007-G Rectifier ICSP Pin header connector (through hole 6)
J-ZU4 ATMEGA328P Module ICSP1 Pin header connector (through hole 6)
Y1 ECS-160-20-4X-DU Oscillator

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