Product Details
Product Description
Product Description
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.
For similar features with 3.3-V supply operation, see the SN65HVD1781 (SLLS877).
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
Applications
• Designed for RS-485 and RS-422 Networks
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