8.1 Overview

The THVD1505 device is a half-duplex RS-485 transceiver suitable for data transmission at rates up to 1 Mbps 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 ESD strikes up to ±8 kV (per IEC 61000-4-2) and EFT transients up to ±2 kV (per IEC 61000-4-4) without incurring damage. Up to 256 units of THVD1500 and/or THVD1505 may share a common RS-485 bus due to the devices' low bus input currents. THVD1505 features automatic polarity correction, which detects bus mis-wiring and swaps A and B.