All electronics ship with US style plugs.You may need a voltage converter or a plug adapter.
Special Features
It has 16 I/O pins
Three I2C address select jumpers mean up to 8 expanders to one bus for 128 total GPIO added
Each pin can be an input with light pull-up or an output sink
IRQ output will automatically alert you when input pins change value
This chip does not have a pin direction register. You cannot set the pins as input or output - instead, each pin has two possible states. Basically, you can think of it as an open-drain output with a 100K resistor pull-up built in.
Option one: Lightly pulled up 'input' - by default it will read as a high logic level, but connecting the GPIO to ground will cause it to read as a low logic level.
Option two: Strong 20mA low-driving transistor sink output. This means the output is 'forced' to be low and will always read as a low logic level.
