SN65HVD17xx Fault-Protected RS-485 Transceivers With ExtendedCommon-Mode Range
- SLLS872J January 2008 – March 2023 SN65HVD1785 , SN65HVD1786 , SN65HVD1787 , SN65HVD1791 , SN65HVD1792 , SN65HVD1793
  
  PRODUCTION DATA

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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
- I_CC 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 NUMBER	PACKAGE⁽¹⁾	BODY SIZE (NOM)
SN65HVD1785, SN65HVD1786, SN65HVD1787	SOIC (8)	4.90 mm × 3.91 mm
SN65HVD1785, SN65HVD1786, SN65HVD1787	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.

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 I_OH = –400 μA conditions and values to the Receiver high-level output voltageGo
Added Receiver enabled V_CM > V_CC 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 V_CM > V_CC 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 T_A ≤ 85°C and T_A ≤ 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 |V_OD| RS-485 with common-mode load T_A ≤ 85°C and T_A ≤ 105°CGo
Changed ΔV_OC 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 t_PLZ, t_PHZ Receiver disable time From 3000 ns To 100 ns.Go
Deleted graph DIFFERENTIAL OUTPUT VOLTAGE vs DIFFERENTIAL LOAD CURRENT.Go