4-channel logic level converter

The module allows to exchange data between systems that use the most popular levels of voltage: 3.3 V and 5 V. It works in both directions simulatneously. It reduces the 5 V to 3.3 V and rises the 3.3 V to 5 V, at the same time. This feature is useful in bidirectional communication protocols, for example, the SPI in full duplex mode. The converter also operates with lower voltages: 3.3 V at 1.8 V. It has four channels.

The kit includes the goldpin connectors(2.54 mm pitch) for self-soldering. Thanks to them, it is possible to connect the system with thebreadboardor the main module (for example,STM32DiscoveryorArduino) viawires. The size of the converter is 16.1 x 13 mm.

The board has signed pins on both sides.

Converter is easy to use, for correct operation, sufficient is to connect the power supply of two systems that will be converted. A higher voltage (e.g. 5 V) should be connected to the output of the HVcc (high voltage), lower (e.g. 3.3 V, 2.8 V or 1.8 V) to LVcc (low voltage). Grounds are connected to the pins marked with the GND symbol. Logic signals should be led to the corresponding HV1, HV2, HV3, HV4 connectors - higher voltages and respectively LV1, LV2, LV3, LV4 - lower voltages.

• Diagram of the module
• Documentation of the used BSS138 transistors