The RS-485 3.3V Click Board™ is a compact accessory board designed to add bidirectional data communication to the design. The board features a Texas Instruments SN65HVD12 differential line transceiver that provides high-speed bidirectional data communication on multipoint bus transmission lines. Compliant with EIA standards RS-485 and RS-422, this 3.3V version of RS485 Click Board™ is intended for balanced data transmission. RS485 Click Board™ 3.3V board features four screw terminals. The two terminals marked with.