The level converter is very easy to use. The board needs to be powered from the two voltage sources (high voltage and low voltage) that your system is using. High voltage (5V for example) to the HV' pin, low voltage (3.3V for example) to LV', and ground from the system to the GND pin.
Connects a 3.3V device to a 5V system
Steps down 5V signals to 3.3V AND steps up 3.3V to 5V simultaneously
This level converter also works with 2.8V and 1.8V devices
Sets high and low voltages and step up and down on the same channel
Each level converter has the capability of converting 4 pins on the high side to 4 pins on the low side with two inputs and two outputs provided for each side