• Menu
  • Product
  • Email
  • PDF
  • Order now

  • SN65HVD17xx Fault-Protected RS-485 Transceivers With ExtendedCommon-Mode Range

    • SLLS872J January   2008  – March 2023 SN65HVD1785 , SN65HVD1786 , SN65HVD1787 , SN65HVD1791 , SN65HVD1792 , SN65HVD1793

      PRODUCTION DATA  

  • CONTENTS
  • SEARCH
  • SN65HVD17xx Fault-Protected RS-485 Transceivers With ExtendedCommon-Mode Range
  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Product Selection Guide
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings (1)
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Thermal Considerations
    7. 7.7 Switching Characteristics
    8. 7.8 Typical Characteristics
  8. 8 Parameter Measurement Information
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Hot-Plugging
      2. 9.3.2 Receiver Failsafe
      3. 9.3.3 70-V Fault-Protection
      4. 9.3.4 Additional Options
    4. 9.4 Device Functional Modes
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
        1. 10.2.1.1 Data Rate and Bus Length
        2. 10.2.1.2 Stub Length
        3. 10.2.1.3 Receiver Failsafe
      2. 10.2.2 Detailed Design Procedure
      3. 10.2.3 Application Curve
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Documentation Support
    2. 13.2 Receiving Notification of Documentation Updates
    3. 13.3 Support Resources
    4. 13.4 Trademarks
    5. 13.5 Electrostatic Discharge Caution
    6. 13.6 Glossary
  14. 14Mechanical, Packaging, and Orderable Information
  15. IMPORTANT NOTICE

Package Options

Mechanical Data (Package|Pins)
  • D|14
    • MPDS177H
Thermal pad, mechanical data (Package|Pins)
Orderable Information
  • slls872j_oa
  • slls872j_pm
search No matches found.
  • Full reading width
    • Full reading width
    • Comfortable reading width
    • Expanded reading width
  • Card for each section
  • Card with all content

 

DATA SHEET

SN65HVD17xx Fault-Protected RS-485 Transceivers With ExtendedCommon-Mode Range

1 Features

  • 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 μA Typical
    • ICC 5 mA Quiescent During Operation
  • Power-Up, Power-Down Glitch-Free Operation

2 Applications

  • Designed for RS-485 and RS-422 Networks

3 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).

Device Information
PART NUMBERPACKAGE(1)BODY SIZE (NOM)
SN65HVD1785,
SN65HVD1786,
SN65HVD1787		SOIC (8)4.90 mm × 3.91 mm
PDIP (8)9.81 mm × 6.35 mm
SN65HVD1791,
SN65HVD1792,
SN65HVD1793		SOIC (14)8.65 mm × 3.91 mm
(1) For all available packages, see the orderable addendum at the end of the datasheet.
GUID-8D9E286D-4CD2-40F6-B4CB-692D025CAC31-low.gif Example of Bus Short to Power Supply

4 Revision History

Changes from Revision I (August 2015) to Revision J (March 2023)

  • Updated the numbering format for tables, figures, and cross-references throughout the documentGo

Changes from Revision H (February 2010) to Revision I (August 2015)

  • 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 Go

Changes from Revision G (April 2009) to Revision H (February 2010)

  • Deleted 70-V from the data sheet titleGo
  • Changed first Features Bullet From: Bus-Pin Fault Protection to > ±70 V To: Bus-Pin Fault Protection to: > ±70 V ('HVD1785, 86,91,92), > ±30 V ('HVD1787, 93)Go
  • Changed Voltage range at A and B inputs in the ABS MAX RATINGS table, adding seperate conditions for the different devicesGo
  • Changed From: Voltage input range, transient pulse, A and B, through 100 Ω To: Transient overvoltage pulse through 100 Ω per TIA-485Go
  • Added the 70-V Fault-Protection sectionGo

Changes from Revision F (November 2008) to Revision G (April 2009)

  • Added IOH = –400 μA conditions and values to the Receiver high-level output voltageGo
  • Added Receiver enabled VCM > VCC Go
  • Added Receiver Failsafe information.Go
  • Changed the Receiver Failsafe sectionGo

Changes from Revision E (July 2008) to Revision F (November 2008)

  • Added to Title: With Extended Common-Mode RangeGo
  • Added Receiver enabled VCM > VCC condition and values to the Driver enabled time Go
  • Added Figure 7-4 Go

Changes from Revision D (June 2008) to Revision E (July 2008)

  • Changed - Removed Product Preview labelGo
  • Changed SN65HVD1792 Removed Product Preview labelGo
  • Changed SN65HVD1793 Removed Product Preview labelGo

Changes from Revision C (March 2008) to Revision D (June 2008)

  • Added Features Bullet: Power-Up, Power-Down Glitch-Free OperationGo
  • Changed (Preview) to part number SN65HVD1791 in the Product Selection GuideGo
  • Added section - APPLICATION INFORMATIONGo
  • Changed Receiver disabled by default - Enable from X to OPEN. Output from OPEN to ZGo

Changes from Revision B (March 2008) to Revision C (March 2008)

  • Changed Rec Op Table. Signaling rate, HVD1787, HVD1793 From: 20 Mbps max to 10 Mbps max.Go

Changes from Revision A (March 2008) to Revision B (March 2008)

  • Added TA ≤ 85°C and TA ≤ 105°C conditions and values to the Receiver low-level output voltage.Go
  • Changed the max value for Supply Current (quiescent) Driver and receiver disabled, From 1 μA To 5 μA.Go

Changes from Revision * (January 2008) to Revision A (March 2008)

  • Changed Features Bullet From: Low Standby Supply Current, 2 μA Max To: Low Standby Supply Current, 1 μA TypGo
  • Deleted columns to the PRODUCT SELECTION GUIDE for Package Options and Status.Go
  • Added text: For similar features with 3.3 V supply operation...Go
  • Changed the Product Selection Guide Signaling Rate for SN65HVD1787 From 20 Mbps To: 10 MbpsGo
  • Changed the Product Selection Guide Signaling Rate for SN65HVD1793 From 20 Mbps To: 10 MbpsGo
  • Deleted The Competitive Comparison table.Go
  • Added |VOD| RS-485 with common-mode load TA ≤ 85°C and TA ≤ 105°CGo
  • Changed ΔVOC From min = -0.2 mV and max 0.2 mV To: min = -100 mV and max 100 mVGo
  • Changed HVD1785/1791 Driver differential output rise/fall time max value From 2.5 μs To: 2.6 μs.Go
  • Changed HVD1787/1793 Driver differential output rise/fall time max value From 1.5 ns To: 30 ns.Go
  • Changed Receiver propagation delay max value From 50 ns To: 70 ns.Go
  • Changed tPLZ, tPHZ Receiver disable time From 3000 ns To 100 ns.Go
  • Deleted graph DIFFERENTIAL OUTPUT VOLTAGE vs DIFFERENTIAL LOAD CURRENT.Go

5 Product Selection Guide

PART NUMBERDUPLEXSIGNALING RATENODESCABLE LENGTH
SN65HVD1785Half115 kbpsUp to 2561500 m
SN65HVD1786Half1 MbpsUp to 256150 m
SN65HVD1787Half10 MbpsUp to 6450 m
SN65HVD1791Full115 kbpsUp to 2561500 m
SN65HVD1792Full1 MbpsUp to 256150 m
SN65HVD1793Full10 MbpsUp to 6450 m

 
Texas Instruments

© Copyright 1995-2025 Texas Instruments Incorporated. All rights reserved.
Submit documentation feedback | IMPORTANT NOTICE | Trademarks | Privacy policy | Cookie policy | Terms of use | Terms of sale