SN65HVD1787

SN65HVD1785, SN65HVD1786, SN65HVD1787 SN65HVD1791, SN65HVD1792, SN65HVD1793 SLLS872J – JANUARY 2008 – REVISED MARCH 2023 SN65HVD17xx Fault-Protected RS-485 Transceivers With Extended Common-Mode Range 1 Features Bus-Pin Fault Protection to: – > ±70 V ('HVD1785, 86, 91, 92) – > ±30 V ('HVD1787, 93) Common-Mode Voltage Range (–20 V to 25 V) More Than Doubles TIA/EIA 485 Requirement Bus I/O Protection – ±16 kV JEDEC HBM Protection Reduced Unit Load for Up to 256 Nodes Failsafe Receiver for Open-Circuit, Short-Circuit and Idle-Bus Conditions Low Power Consumption – Low Standby Supply Current, 1 μA Typical – ICC 5 mA Quiescent During Operation Power-Up, Power-Down Glitch-Free Operation 2 Applications Designed for RS-485 and RS-422 Networks 3 Description These devices are designed to survive overvoltage faults such as direct shorts to power supplies, miswiring faults, connector failures, cable crushes, and tool mis-applications. They are also robust to ESD events, with high levels of protection to human-body model specifications. These devices combine a differential driver and a differential receiver, which operate from a single power supply. In the 'HVD1785, 'HVD1786, and 'HVD1787, the driver differential outputs and the receiver differential inputs are connected internally to form a bus port suitable for half-duplex (two-wire bus) communication. In the 'HVD1793, the driver differential outputs and the receiver differential inputs are separate pins, to form a b...