SN65HVD1780 Datasheet, PDF (1/15 Pages) Texas Instruments – 70-V Fault-Protected RS-485 Transceivers

SN65HVD1780
SN65HVD1781
SN65HVD1782
www.ti.com ............................................................................................................................................. SLLS877D – DECEMBER 2007 – REVISED AUGUST 2008
70-V Fault-Protected RS-485 Transceivers
FEATURES
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• Bus-Pin Fault Protection to > ±70 V
• Operation With 3.3-V to 5-V Supply Range
• ±16 kV HBM Protection on Bus Pins
• Reduced Unit Load for up to 320 Nodes
• Failsafe Receiver for Open-Circuit,
Short-Circuit and Idle-Bus Conditions
• Low Power Consumption
– Low Standby Supply Current, 1 µA Max
– I_CC 4 mA Quiescent During Operation
• Pin-Compatible With Industry-Standard
SN75176
• Signaling Rates of 115 kbps, 1 Mbps, and up
to 10 Mbps
APPLICATIONS
• HVAC Networks
• Security Electronics
• Building Automation
• Telecomm Equipment
• Motion Control
• Industrial 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. The internal current-limit circuits allow fault
survivability without causing the high bus currents that otherwise might damage external components or power
supplies. They are also robust to ESD events, with high levels of protection to the JEDEC or IEC
human-body-model specification.
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 form a bus port
suitable for half-duplex (two-wire bus) communication. This port features a wide common-mode voltage range,
making the devices suitable for multipoint applications over long cable runs. These devices are characterized
from –40°C to 125°C. These devices are pin-compatible with the industry-standard SN75176 transceiver, making
them drop-in upgrades in most systems.
These devices are fully compliant with ANSI TIA/EIA 485-A with a 5-V supply and can operate with a 3.3-V
supply with reduced driver output voltage for low-power applications. For applications where operation is required
over an extended common-mode voltage range, see the SN65HVD1785 (SLLS872) data sheet.
V_FAULT up to 70 V
M0092-02
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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 © 2007–2008, Texas Instruments Incorporated