Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsInterface ICsInterface IC - transceivers RS422, RS485 1/1 SOIC 8

FAULT

up to 70 V

INVInputCanCorrect

forCrossedWires

SN65HVD1794, SN65HVD1795

SN65HVD1796

www.ti.com

SLLS935A –AUGUST 2008–REVISED AUGUST 2012

70-V Fault-Protected RS-485 Transceiver With Cable Invert

Check for Samples: SN65HVD1794, SN65HVD1795, SN65HVD1796

FEATURES

• Bus-Pin Fault Protection to > ±70 V • Failsafe Receiver for Open-Circuit, Short-

Circuit and Idle-Bus Conditions

• Cable Invert Function Allows Correction for

Reversed Bus Pins • Low Power Consumption

• Common-Mode Voltage Range (–20 V to 25 V) – I

5 mA Quiescent During Operation

More Than Doubles TIA/EIA 485 Requirement

• Power-Up, Power-Down Glitch-Free Operation

• Bus I/O Protection

APPLICATIONS

– ±16 kV JEDEC HBM Protection

• Designed for RS-485 and RS-422 Networks

• Reduced Unit Load for Up to 256 Nodes

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.

The driver differential outputs and the receiver differential inputs are connected internally to for a bus port

suitable for half-duplex (two-wire bus) communication. A cable invert pin (INV) allows active correction of mis-

wires that may occur during installation. Upon detecting communication errors, the user can apply a logic HIGH

to the INV pin, effectively inverting the polarity of the differential bus port, thereby correcting for the reversed bus

wires.

These devices feature a wide common-mode voltage range, making them suitable for multi-point applications

over long cable runs. These devices are characterized from –40°C to 105°C.

Table 1. PRODUCT SELECTION GUIDE

PART NUMBER DUPLEX SIGNALING RATE NODES CABLE LENGTH

SN65HVD1794 Half 115 kbps Up to 256 1500 m

SN65HVD1795 PREVIEW Half 1 Mbps Up to 256 150 m

SN65HVD1796 PREVIEW Half 10 Mbps Up to 64 50 m

For similar features with 3.3 V supply operation, see the SN65HVD1781 (SLLS877).

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

UNLESS OTHERWISE NOTED this document contains

PRODUCTION DATA information current as of publication date.

Products conform to specifications per the terms of Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (18 pages)

PAGE 1
SN65HVD1794, SN65HVD1795 SN65HVD1796 www.ti.
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SN65HVD1794, SN65HVD1795 SN65HVD1796 SLLS935A – AUGUST 2008 – REVISED AUGUST 2012 www.ti.com This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure.
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SN65HVD1794, SN65HVD1795 SN65HVD1796 www.ti.com SLLS935A – AUGUST 2008 – REVISED AUGUST 2012 ABSOLUTE MAXIMUM RATINGS (1) VCC VALUE UNIT Supply voltage –0.5 to 7 V Voltage range at A and B pins with respect to GND –70 to 70 V Voltage range across A and B pins (differential) –70 to 70 V –0.3 to VCC + 0.
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SN65HVD1794, SN65HVD1795 SN65HVD1796 SLLS935A – AUGUST 2008 – REVISED AUGUST 2012 www.ti.com ELECTRICAL CHARACTERISTICS over recommended operating conditions (unless otherwise noted) PARAMETER |VOD| Driver differential output voltage magnitude TEST CONDITIONS RS-485 with common-mode load, VCC > 4.75 V, see Figure 2 MIN TA ≤ 85°C 1.5 TA ≤ 105°C 1.4 RL = 54 Ω, 4.75 V ≤ VCC ≤ 5.25 V RL = 100 Ω, 4.75 V ≤ VCC ≤ 5.25 V TYP MAX UNIT V 1.5 2 2 2.5 –0.2 0 0.
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SN65HVD1794, SN65HVD1795 SN65HVD1796 www.ti.com SLLS935A – AUGUST 2008 – REVISED AUGUST 2012 SWITCHING CHARACTERISTICS over recommended operating conditions (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT 0.4 1.7 2.6 μs 0.8 2 μs 20 250 ns 0.1 5 μs 0.
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SN65HVD1794, SN65HVD1795 SN65HVD1796 SLLS935A – AUGUST 2008 – REVISED AUGUST 2012 www.ti.com THERMAL INFORMATION PARAMETER TEST CONDITIONS SOIC-8 RθJA Junction-to-ambient thermal resistance (no airflow) DIP-8 RθJB Junction-to-board thermal resistance RθJC Junction-to-case thermal resistance JEDIC low-K model 242 JEDEC high-K model 59 JEDIC low-K model 128 62 DIP-8 39 SOIC-8 61 DIP-8 61 94 95 Power dissipation 138 SOIC-8 94 PD VALUE JEDEC high-K model VCC = 5.
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SN65HVD1794, SN65HVD1795 SN65HVD1796 www.ti.com SLLS935A – AUGUST 2008 – REVISED AUGUST 2012 PARAMETER MEASUREMENT INFORMATION (continued) 3V VCC DE D Input Generator VI 50 W CL = 50 pF ±20% A VOD B RL = 54 W ±1% CL Includes Fixture and Instrumentation Capacitance VI 50% 50% tPLH VOD tPHL »2V 90% 90% 0V 10% 0V 10% tr » –2 V tf Note: VI is solid line when INV = LO, VI is dashed when INV = HI Figure 4.
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SN65HVD1794, SN65HVD1795 SN65HVD1796 SLLS935A – AUGUST 2008 – REVISED AUGUST 2012 www.ti.com PARAMETER MEASUREMENT INFORMATION (continued) A Input Generator VO R 50 W VI B 1.5 V CL = 15 pF ±20% CL Includes Fixture and Instrumentation Capacitance 3V VI 50% 50% 0V tPLH tPHL 90% 90% VO 50% 10% 50% 10% tr VOH VOL tf Note: VI is solid line when INV = LO, VI is dashed when INV = HI Figure 7.
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SN65HVD1794, SN65HVD1795 SN65HVD1796 www.ti.com SLLS935A – AUGUST 2008 – REVISED AUGUST 2012 TYPICAL CHARACTERISTICS (continued) BUS PIN CURRENT vs BUS PIN VOLTAGE 2.0 IIN − Bus Pin Current − mA 1.5 1.0 0.5 0.0 −0.5 −1.0 −1.5 −2.0 −90 −60 −30 0 30 60 90 VIN − Bus Pin Voltage − V G004 Figure 10. VOD - Differential Output Voltage - V DIFFERENTIAL OUTPUT VOLTAGE vs DIFFERENTIAL LOAD CURRENT 4.4 4.2 4 3.8 3.6 3.4 3.2 3 2.8 2.6 2.4 2.2 2 1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 0.
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SN65HVD1794, SN65HVD1795 SN65HVD1796 SLLS935A – AUGUST 2008 – REVISED AUGUST 2012 www.ti.com ADDITIONAL OPTIONS The SN65HVD17xx family also has options for J1708 applications, for always-enabled full-duplex versions (industry-standard SN65LBC179 footprint) and for inverting-polarity versions, which allow users to correct a reversal of the bus wires without re-wiring. Contact your local Texas Instruments representative for information on these options.
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SN65HVD1794, SN65HVD1795 SN65HVD1796 www.ti.com SLLS935A – AUGUST 2008 – REVISED AUGUST 2012 APPLICATION INFORMATION Hot-Plugging These devices are designed to operate in "hot swap" or "hot pluggable" applications. Key features for hotpluggable applications are power-up, power-down glitch free operation, default disabled input/output pins, and receiver failsafe.
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SN65HVD1794, SN65HVD1795 SN65HVD1796 SLLS935A – AUGUST 2008 – REVISED AUGUST 2012 www.ti.com Changes from Original (August 2008) to Revision A • 12 Page Added Voltage range across A and B pins (differential) in Absolute Maximum Ratings table .............................................
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PACKAGE MATERIALS INFORMATION www.ti.com 26-Jan-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device SN65HVD1794DR Package Package Pins Type Drawing SOIC D 8 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 2500 330.0 12.4 Pack Materials-Page 1 6.4 B0 (mm) K0 (mm) P1 (mm) 5.2 2.1 8.0 W Pin1 (mm) Quadrant 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 26-Jan-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN65HVD1794DR SOIC D 8 2500 367.0 367.0 35.
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