SN65HVD1785DR

70V故障保护的RS-485半双工收发器

DESCRIPON

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