What separates this logic level converter from other versions is that you can set your high and low voltages and step up and down between them safely 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.
The level converter is very easy to use. The board is powered from the two voltages 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’ pins. Minimum low voltage LV is 1.8V, maximum high voltage HV is 5V.
There are four separate data channels on the converter board, each capable of shifting data to and from high and low voltages. These pins are labeled HV1, LV1, HV2, LV2, HV3, LV3, and HV4 and LV4. The number at the end of each label designates the channel of the pin, and the HV or LV prefix determines whether it’s on the high or low side of the channel.
A low-voltage signal sent in to LV1, for example, will be shifted up to the higher voltage and sent out HV1. A signal sent in HV3 will be shifted down and sent out of LV3. Use as many of these channels as your project requires. You don’t have to use every single one.
These level shifters are purely digital. They can’t map an analog voltage from one max voltage to another.
- High voltage is 5V, low voltage is 3.3V
- HV connect with 5V power supply
- LV connect with 3.3V power supply
- GND connect the power negative pole
- LVx input/output 3.3V TTL
- HVx input/output 5V TTL
- Bi-Directional transform between LVx and TVx