Datasheet
-20 V +25 V
-7V +12 V
SUPER485
RS485
-20V -15V -10V -5V 0 5V 10V 15V 20V 25V
0.1
1
10
100
HVD20
HVD23
HVD24
HVD21
HVD22
SignalingRate-Mbps
10
100
1000
CableLength-m
SN65HVD20, SN65HVD21
SN65HVD22, SN65HVD23, SN65HVD24
www.ti.com
SLLS552E –DECEMBER 2002–REVISED MAY 2010
Extended Common-Mode RS-485 Transceivers
Check for Samples: SN65HVD20, SN65HVD21, SN65HVD22, SN65HVD23, SN65HVD24
1
FEATURES
DESCRIPTION
• Common-Mode Voltage Range (–20 V to 25 V)
The transceivers in the HVD2x family offer
More Than Doubles TIA/EIA-485 Requirement
performance far exceeding typical RS−485 devices.
• Receiver Equalization Extends Cable Length,
In addition to meeting all requirements of the
Signaling Rate (HVD23, HVD24)
TIA/EIA−485−A standard, the HVD2x family operates
• Reduced Unit-Load for up to 256 Nodes
over an extended range of common-mode voltage,
and has features such as high ESD protection, wide
• Bus I/O Protection to Over 16-kV HBM
receiver hysteresis, and failsafe operation. This family
• Failsafe Receiver for Open-Circuit,
of devices is ideally suited for long-cable networks,
Short-Circuit and Idle-Bus Conditions
and other applications where the environment is too
• Low Standby Supply Current 1-µA Max
harsh for ordinary transceivers.
• More Than 100 mV Receiver Hysteresis
These devices are designed for bidirectional data
transmission on multipoint twisted-pair cables.
APPLICATIONS
Example applications are digital motor controllers,
remote sensors and terminals, industrial process
• Long Cable Solutions
control, security stations, and environmental control
– Factory Automation
systems.
– Security Networks
These devices combine a 3-state differential driver
– Building HVAC
and a differential receiver, which operate from a
single 5-V power supply. The driver differential
• Severe Electrical Environments
outputs and the receiver differential inputs are
– Electrical Power Inverters
connected internally to form a differential bus port
– Industrial Drives
that offers minimum loading to the bus. This port
features an extended common-mode voltage range
– Avionics
making the device suitable for multipoint applications
over long cable runs.
HVD2x APPLICATION SPACE
HVD2x Devices Operate Over a Wider
Common-Mode Voltage Range
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 2002–2010, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.