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
