Texas Instruments SN65HVD20, SN65HVD21, SN65HVD22, SN65HVD23, SN65HVD24 Data Sheet Manual
Summary
High-performance differential transceivers designed for robust and reliable data communication over challenging long-cable and multipoint networks. This manual details the HVD2x family, specifying signal rates, common-mode voltage ranges (down to -20V), and advanced features like receiver equalization and failsafe circuits. Perfect for engineers designing systems in industrial automation, smart building controls, factory environments, or security networks that require extended reach and high data integrity.
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SLLS552D − DECEMBER 2002 − REVISED APRIL 2005
FEATURES DESCRIPTION Common-Mode Voltage Range (−20 V to 25 V) More Than Doubles TIA/EIA-485 Requirement The transceivers in the HVD2x family offer performance
Receiver Equalization Extends Cable Length, far exceeding typical RS−485 devices. In addition to meeting all requirements of the TIA/EIA−485−A standard,
Signaling Rate (HVD23, HVD24)
the HVD2x family operates over an extended range of
Reduced Unit-Load for up to 256 Nodes
common-mode voltage, and has features such as high Bus I/O Protection to Over 16-k V HBM ESD protection, wide receiver hysteresis, and failsafe operation. This family of devices is ideally suited for
Failsafe Receiver for Open-Circuit,
long-cable networks, and other applications where the
Short-Circuit and Idle-Bus Conditions
environment is too harsh for ordinary transceivers.
Low Standby Supply Current 1-µA Max
These devices are designed for bidirectional data
More Than 100 m V Receiver Hysteresis transmission on multipoint twisted-pair cables. Example
applications are digital motor controllers, remote sensors
APPLICATIONS
and terminals, industrial process control, security stations, and environmental control systems.
Long Cable Solutions Factory Automation
These devices combine a 3-state differential driver and a
Security Networks differential receiver, which operate from a single 5-V power
Building HVAC supply. The driver differential outputs and the receiver differential inputs are connected internally to form a
Severe Electrical Environments
differential bus port that offers minimum loading to the bus.
Electrical Power Inverters
This port features an extended common-mode voltage
Industrial Drives range making the device suitable for multipoint Avionics applications over long cable runs.
HVD2x APPLICATION SPACE
HVD2x Devices Operate Over a Wider Common-Mode Voltage Range
HVD23
HVD20
SUPER−485
HVD24
HVD21
RS−485
HVD22 −20 V −15 V −10 V −5 V 5 V 10 V 15 V 20 V 25 V
Cable Length − m
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.
!"# $ %& ' # "$ (&)*%"# +"#', +&%#$ Copyright 2002 − 2003, Texas Instruments Incorporated
Page Summary Contents For Texas Instruments SN65HVD20, SN65HVD21, SN65HVD22, SN65HVD23, SN65HVD24 Data Sheet Manual
Manual Details
| Brand | Texas Instruments |
|---|---|
| Pages | 26 |
| File Size | 522.94 KB |
| Published | May 29, 2026 |
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Frequently Asked Questions
What protective feature guards against noise during signal loss?
The failsafe receiver circuit provides a high-level output within 250 microseconds after the input signal is lost, preventing ambient noise from being recognized as valid data.
How should I store or handle these transceivers safely?
Because they have limited built-in ESD protection, you must short the leads together or store them in conductive foam to prevent static damage.
What voltage range does this device family support for common-mode operation?
The HVD2x devices are designed for a wide common-mode voltage range of −20V to +25V.
What advantage do models like the HVD23 and HVD24 offer?
They implement receiver equalization technology, improving jitter performance on differential bus applications at much longer cable lengths (up to 160m or 1000m).