SN65HVD1785 Datasheet, PDF (1/24 Pages) Texas Instruments – 70-V Fault-Protected RS-485 Transceivers

SN65HVD1785, SN65HVD1786
SN65HVD1787, SN65HVD1791
SN65HVD1792, SN65HVD1793
www.ti.com
SLLS872H – JANUARY 2008 – REVISED FEBRUARY 2010
Fault-Protected RS-485 Transceivers With Extended Common-Mode Range
Check for Samples: SN65HVD1785, SN65HVD1786, SN65HVD1787, SN65HVD1791, SN65HVD1792, SN65HVD1793
FEATURES
1
• Bus-Pin Fault Protection to:
– > ±70 V ('HVD1785, 86,91,92)
– > ±30 V ('HVD1787, 93)
• Common-Mode Voltage Range (–20 V to 25 V)
More Than Doubles TIA/EIA 485 Requirement
• Bus I/O Protection
– ±16 kV JEDEC HBM Protection
• Reduced Unit Load for Up to 256 Nodes
• Failsafe Receiver for Open-Circuit,
Short-Circuit and Idle-Bus Conditions
• Low Power Consumption
– Low Standby Supply Current, 1 mA Typ
– I_CC 5 mA Quiescent During Operation
• Power-Up, Power-Down Glitch-Free Operation
APPLICATIONS
• Designed for RS-485 and RS-422 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. They are also robust to ESD events, with high
levels of protection to human-body model specifications.
These devices combine a differential driver and a differential receiver, which operate from a single power supply.
In the 'HVD1785, 'HVD1786, and 'HVD1787, 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. In the 'HVD1793,
the driver differential outputs and the receiver differential inputs are separate pins, to form a bus port suitable for
full-duplex (four-wire bus) communication. These ports feature 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
105°C.
For similar features with 3.3 V supply operation, see the SN65HVD1781 (SLLS877).
PART NUMBER
SN65HVD1785
SN65HVD1786
SN65HVD1787
SN65HVD1791
SN65HVD1792
SN65HVD1793
V_FAULT up to 70 V
M0092-01
PRODUCT SELECTION GUIDE
DUPLEX
SIGNALING RATE
NODES
Half
115 kbps
Up to 256
Half
1 Mbps
Up to 256
Half
10 Mbps
Up to 64
Full
115 kbps
Up to 256
Full
1 Mbps
Up to 256
Full
10 Mbps
Up to 64
CABLE LENGTH
1500 m
150 m
50 m
1500 m
150 m
50 m
1
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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.
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