1 Features
• Common-mode voltage range (–20 V to 25 V)
more than doubles TIA/EIA-485 requirement
• Receiver equalization extends cable length,
signaling rate (SN65HVD2[3,4])
• Reduced unit-load for up to 256 nodes
• Bus I/O protection to over 16-kV HBM
• Failsafe receiver for open-circuit, short-circuit, and
idle-bus conditions
• Low standby supply current 1 μA (maximum)
• More than 100 mV receiver hysteresis

2 Applications
• Long cable solutions
– Factory automation
– Security networks
– Building HVAC
• Severe electrical environments
– Electrical power inverters
– Industrial drives
– Avionics

3 Description
The transceivers in the SN65HVD2x family offer
performance far exceeding typical RS-485 devices.
In addition to meeting all requirements of the
TIA/EIA‑485-A standard. The SN65HVD2x family
operates over an extended range of common-mode
voltages and has features such as high ESD
protection, wide receiver hysteresis, and failsafe
operation. This family of devices is designed for longcable
networks, and other applications where the
environment is too harsh for ordinary transceivers.
These devices are designed for bidirectional data
transmission on multipoint twisted-pair cables.
Example applications are digital motor controllers,
remote sensors and terminals, industrial process
control, security stations, and environmental control
systems.
These devices combine a 3-state differential driver
and a differential receiver that operate from a single
5-V power supply. The driver differential outputs and
the receiver differential inputs are connected internally
to form a differential bus port that offers minimum
loading to the bus. This port features an extended
common-mode voltage range, making the device
suitable for multipoint applications over long cable
runs.