SN65HVD1780_0809 Datasheet, PDF (1/19 Pages) Texas Instruments – 70-V Fault-Protected RS-485 Transceivers with 3.3-V to 5-V Operation

SN65HVD1780
SN65HVD1781
SN65HVD1782
www.ti.com ...................................................................................................................................... SLLS877E – DECEMBER 2007 – REVISED SEPTEMBER 2008
70-V Fault-Protected RS-485 Transceivers with 3.3-V to 5-V Operation
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.
Transceiver
HVD1780
HVD1781
HVD1782
V_FAULT up to 70 V
Signaling Rate
Up to 115 kbps
Up to 1 Mbps
Up to 10 Mbps
M0092-02
Number of Nodes
Up to 320
Up to 320
Up to 64
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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