What is it?

AW9523 is a 16 I/O Port-Expander. Very cheap and easy to use with Arduino.

If you want to support me please order directly via my homepage: ripper121.com

The PCB has a pin spacing of 2.54mm / 0.1 in, so perfect for Perfboard or Breadboard.

Arduino Library: github.com/adafruit/Adafruit_AW9523

Why did you make it?

I looked for a cheap and small port Expander and found that part on LCSC, so I created this PCB.

What makes it special?

AW9523 Features:

• 16 multi-function I/O, each for LED drive (current-source dimming) or GPIO mode

• 256 steps linear dimming in LED drive mode

• Any GPIO can be configured as an input or an output independently

• Support interrupt, 8us deglitch, low-level active

• Standard I2C interface, A1/A0 select I2C device address

• SDA, SCL, SHDN, and all GPIO can accept in 1.8V logic input

• ESD protection: ±4000V HBM (MIL-STD-883H Method 3015.8 standard）

• Latch-up ：±450mA（ JEDEC STANDARD NO.78C SEPTEMBER 2010 standard）

• Supply shutdown function, low-level active

• 2.5V~5.5V power supply

• I2C address default 0x58 (can be 0x59, 0x5A or 0x5B)