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SN65HVD1781 Datasheet Preview

SN65HVD1781 Datasheet

RS-485 Transceiver

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SN65HVD1780, SN65HVD1781, SN65HVD1782
SLLS877H – DECEMBER 2007 – REVISED MARCH 2017
SN65HVD178x Fault-Protected RS-485 Transceivers With 3.3-V to 5-V Operation
1 Features
1 Bus-Pin Fault Protection to:
– > ±70 V (SN65HVD1780, SN65HVD1781)
– > ±30 V (SN65HVD1782)
• 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 Maximum
– ICC 4-mA Quiescent Current During Operation
• Pin-Compatible With Industry-Standard SN75176
• Signaling Rates of 115 kbps, 1 Mbps, and up to
10 Mbps
• Create a Custom Design using the SN65HVD178x
with the WEBENCH® Power Designer
2 Applications
• HVAC Networks
• Security Electronics
• Building Automation
• Telecommunication Equipment
• Motion Control
• Industrial Networks
3 Description
The SN65HVD178x 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 devices are
also robust to ESD events with high levels of
protection to the human-body-model specification.
The SN65HVD178x devices combine a differential
driver and a differential receiver, which operate from
a single power supply. In the SN65HVD1782, 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.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
SN65HVD178x
SOIC (8)
PDIP (8)
4.90 mm × 3.91 mm
9.81 mm × 6.35 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Protection Against Bus Shorts
VFAULT up to 70 V
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.




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SN65HVD1781 Datasheet Preview

SN65HVD1781 Datasheet

RS-485 Transceiver

No Preview Available !

SN65HVD1780, SN65HVD1781, SN65HVD1782
SLLS877H – DECEMBER 2007 – REVISED MARCH 2017
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Device Comparison Table..................................... 4
6 Pin Configuration and Functions ......................... 4
7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ..................................... 4
7.2 ESD Ratings: JEDEC................................................ 5
7.3 ESD Ratings: IEC ..................................................... 5
7.4 Recommended Operating Conditions....................... 5
7.5 Thermal Information .................................................. 5
7.6 Electrical Characteristics........................................... 6
7.7 Power Dissipation Characteristics ............................ 7
7.8 Switching Characteristics .......................................... 7
7.9 Typical Characteristics .............................................. 9
8 Parameter Measurement Information ................ 10
8.1 Equivalent Input Schematic .................................... 14
9 Detailed Description ............................................ 15
9.1 Overview ................................................................. 15
9.2 Functional Block Diagram ....................................... 15
9.3 Feature Description................................................. 15
9.4 Device Functional Modes........................................ 16
10 Application and Implementation........................ 18
10.1 Application Information.......................................... 18
10.2 Typical Application ............................................... 18
11 Power Supply Recommendations ..................... 22
12 Layout................................................................... 22
12.1 Layout Guidelines ................................................. 22
12.2 Layout Example .................................................... 22
13 Device and Documentation Support ................. 23
13.1 Device Support...................................................... 23
13.2 Documentation Support ........................................ 23
13.3 Related Links ........................................................ 23
13.4 Receiving Notification of Documentation Updates 23
13.5 Community Resources.......................................... 24
13.6 Trademarks ........................................................... 24
13.7 Electrostatic Discharge Caution ............................ 24
13.8 Glossary ................................................................ 24
14 Mechanical, Packaging, and Orderable
Information ........................................................... 24
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision G (August 2015) to Revision H
Page
• Added WEBENCH information to the Features, Detailed Design Procedure, and Device Support sections ........................ 1
• Added values to the Storage temperature in the Absolute Maximum Ratings table.............................................................. 4
• Added the Equivalent Input Schematic section .................................................................................................................... 14
Changes from Revision F (August 2012) to Revision G
Page
• Added Pin Configuration and Functions section, ESD Ratings table, Feature Description section, Device Functional
Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device
and Documentation Support section, and Mechanical, Packaging, and Orderable Information section .............................. 1
Changes from Revision E (September 2008) to Revision F
Page
• Deleted text from the first Description paragraph - The internal current-limit circuits allow fault survivability without
causing the high bus currents that otherwise might damage external components or power supplies. ............................... 1
• Changed From: Voltage input range, transient pulse, A and B, through 100 in the Absolute Maximum Ratings
table To: Transient overvoltage pulse through 100 per TIA-485 ........................................................................................ 4
• Changed Figure 13 title From: Measurement of Receiver Enable Times With Driver Disabled To: Measurement of
Receiver Enable Times With Driver Disabled ...................................................................................................................... 13
Changes from Revision D (August 2008) to Revision E
Page
• Changed Bus input current (disabled driver), separating the condition for the different devices........................................... 6
2
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Copyright © 2007–2017, Texas Instruments Incorporated
Product Folder Links: SN65HVD1780 SN65HVD1781 SN65HVD1782


Part Number SN65HVD1781
Description RS-485 Transceiver
Maker etcTI
Total Page 3 Pages
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