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1FEATURES

? Bus-Pin Fault Protection to > ±70 V

? Cable Invert Function Allows Correction for

Reversed Bus Pins

? 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

– ICC 5 mA Quiescent During Operation

? Power-Up, Power-Down Glitch-Free Operation

APPLICATIONS

? Designed for RS-485 and RS-422 Networks

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.

The driver differential outputs and the receiver differential inputs are connected internally to for a bus port

suitable for half-duplex (two-wire bus) communication. A cable invert pin (INV) allows active correction of miswires

that may occur during installation. Upon detecting communication errors, the user can apply a logic HIGH

to the INV pin, effectively inverting the polarity of the differential bus port, thereby correcting for the reversed bus

wires.

These devices feature a wide common-mode voltage range, making them suitable for multi-point applications

over long cable runs. These devices are characterized from –40°C to 105°C.