The ADM2484E is an isolated data transceiver with ±15 kV ESD protection suitable for high speed， half- or full-duplex communication on multipoint transmission lines. For halfduplex operation， the transmitter outputs and receiver inputs share the same transmission line. Transmitter Output Pin Y links externally to Receiver Input Pin A， and Transmitter Output Pin Z links externally to Receiver Input Pin B. Designed for balanced transmission lines， the ADM2484E complies with ANSI TIA/EIA RS-485-A-1998 and ISO 8482： 1987（E）。 The device employs Analog Devices， Inc.， iCoupler? technology to combine a 3-channel isolator， a three-state differential line driver， and a differential input receiver into a single package. The differential transmitter outputs and receiver inputs feature electrostatic discharge circuitry that provides protection up to ±15 kV using the human body model （HBM）。 The logic side of the device can be powered with either a 5 V or a 3.3 V supply， whereas the bus side requires an isolated 3.3 V supply. The device has current-limiting and thermal shutdown features to protect against output short circuits and situations where bus contention causes excessive power dissipation.