8.1 Overview

The SN65HVD888 device is a half-duplex RS-485 transceiver suitable for data transmission at rates up to 250 kbps over controlled-impedance transmission media (such as twisted-pair cabling). The device features a high level of internal transient protection, making it able to withstand up ESD strikes up to 12 kV (per IEC 61000-4-2) and EFT transients up to 4 kV (per IEC 61000-4-4) without incurring damage. Up to 256 units of SN65HVD82 may share a common RS-485 bus due to the device’s low bus input currents. The device features automatic polarity correction, which detects bus mis-wirings at start-up and then swaps the A and B halves of the bus if needed.