ANALOG DEVICES MAX3079EASD+

The MAX3079EASD+ is a ±15KV ESD protected, fail-safe, hot swap RS485/RS422 transceiver in 14 pin NSOIC package. This 3.3V transceiver has one driver and one receiver. It includes fail-safe circuitry which provides logic high receiver output when receiver inputs are open or shorted. The receiver provides logic high if all transmitters on a terminated bus are disabled (high impedance). The device includes a hot swap capability to eliminate false transitions on the bus during power-up or hot insertion. The MAX3079E slew rate is pin selectable for 250Kbps, 500Kbps and 16Mbps. It also has independently programmable receiver and transmitter output phase through separate pins. This transceivers draw 800µA of supply current when unloaded or when fully loaded with the drivers disabled. The transceiver has 1/8 unit load receiver input impedance allowing up to 256 transceivers on the bus. It is typically used in lighting systems.