This document describes the features and characteristics of the ADM3483/ADM3485/ADM3488/ADM3490/ADM3491 series half-duplex and full-duplex RS-485/RS-422 transceivers, including operation with a 3.3V supply, interoperability with 5V logic, compliance with EIA RS-422 and RS-485 standards, data rate options, reduced slew rates for low EMI, low power consumption, and the ability to connect up to 32 transceivers simultaneously.