SN65HVD21A Datasheet, PDF (1/22 Pages) Texas Instruments – 6 Mbps, Extended Common-Mode RS-485 Transceiver

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SN65HVD21A
SLLSE36 – DECEMBER 2010
6 Mbps, Extended Common-Mode RS-485 Transceiver
Check for Samples: SN65HVD21A
FEATURES
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• Common-Mode Voltage Range (–20 V to 25 V)
More Than Doubles TIA/EIA-485 Requirement
• 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 Max
• More Than 100 mV Receiver Hysteresis
APPLICATIONS
• Long Cable Solutions
– Factory Automation
– Security Networks
– Building HVAC
• Severe Electrical Environments
– Electrical Power Inverters
– Industrial Drives
– Avionics
DESCRIPTION
The SN65HVD21A offers performance far exceeding
typical RS−485 devices. In addition to meeting all
requirements of the TIA/EIA−485−A standard, the
device operates over an extended range of
common-mode voltage, and has features such as
high ESD protection, wide receiver hysteresis, and
failsafe operation. This device is ideally suited for
long-cable networks, and other applications where
the environment is too harsh for ordinary
transceivers.
The device is 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.
The device combines a 3-state differential driver and
a differential receiver, which 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.
Device Operates Over a Wider Common-Mode Voltage Range
-20 V
+25 V
SUPER485
RS485
-7 V
+12 V
-20 V -15 V -10 V -5 V 0 5 V 10 V 15 V 20 V 25 V
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2010, Texas Instruments Incorporated