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Arduino Due: specs and pinout

32-bit Arduino board built around the Atmel SAM3X8E ARM Cortex-M3, with 54 digital I/O pins, 12 analog inputs, 2 DAC outputs, 4 UARTs and a native USB port. It runs at 3.3 V.

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Specs

Power

Pinout

Pin rows are from the official Arduino Due user manual (SKU A000062), section 6.2. If the listed board is a compatible clone, the Arduino document is used as the reference and the clone's own layout is not covered. The manual's table labels pin 18 of the 26-pin header 'D0/TX0'; its description gives the receiver function.

Build with it

Project ideas for the Arduino Due. Each link opens Soldr with the prompt filled in; Soldr assigns the pins, checks power and shows how to wire every part.

• Three-plant soil moisture logger: Three sensors can use A0 to A2 (0 to 3.3 V inputs); power the sensors from the 3.3 V pin so outputs stay inside the 3.3 V input limit.
• Tilt and motion display: Both modules use I2C on SDA1/SCL1 or SDA/SCL at 3.3 V logic, matching the Due's 3.3 V I/O.
• Servo sweep controller: Run the servo from its own 5 V supply with ground joined to the Due; only the control signal comes from the board, within its 8 mA per pin limit.

Common mistakes

• Connecting 5 V signals or 5 V sensors' outputs to the I/O pins: the Due's pins tolerate 3.3 V maximum and higher voltages could damage the board (source: Arduino datasheet A000062 Section 5.2 safety note)
• Feeding an analog sensor from 5 V: the analog inputs measure ground to a maximum of 3.3 V (source: Arduino datasheet A000062 Section 2.1)
• Drawing more than 8 mA per I/O pin: the manual lists 8 mA DC per I/O pin, so drive loads through a transistor or driver (source: Arduino datasheet A000062 Section 2.1)

Not covered by the official source

• Typical current is not given in the manual; only min and max are listed.
• The figure on p.9 is not reproduced here.

Sources

• Arduino datasheet A000062 (Arduino Due User Manual, SKU A000062, modified 07/11/2026)