It's a controller with two open-drain GPIOs on a single wire.
You can put as many DS2413s as you want on a single I/O line, each uniquely addressable, happily sharing a single I/O pin. You can use the two controllable I/O lines (PIOA and PIOB) as inputs or outputs. These are open-drain, so if you want to power an LED or something, you'll need an external power source
( see Maxim's product page for more details )
There's a basic Arduino sketch available that uses the OneWire library to communicate with this chip. Don't forget to add a 4.7Kohm resistor from the I/O to your 1-Wire controller power supply (3.3V - 5V) on the Arduino side.
For schematics, EagleCAD PCB files, datasheets, and more, check out the product page.
You can order the DS2413 1-Wire Dual GPIO Controller Breakout from the Adafruit category at SAMM Market with competitive pricing, same-day shipping, and fast delivery advantages.