DESCRIPTION
●These devices are designed to survive overvoltage faults such as direct shorts to power supplies, mis-wiring 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 bus port suitable for full-duplex (four-wire bus) communication. These ports feature a wide common-mode voltage range, making the devices suitable for multipoint applications over long cable runs. These devices are characterized from –40°C to 105°C.
●1FEATURES
●• 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 mA Typ
●– ICC 5 mA Quiescent During Operation
●• Power-Up, Power-Down Glitch-Free Operation
