Sample & Buy Product Folder Technical Documents Support & Community Tools & Software SN65HVD30-EP, SN65HVD31-EP, SN65HVD32-EP SN65HVD33-EP, SN65HVD34-EP, SN65HVD35-EP SGLS367E – SEPTEMBER 2006 – REVISED SEPTEMBER 2015 SN65HVD3x-EP 3.3-V Full-Duplex RS-485 Drivers And Receivers 1 Features 3 Description • The SN65HVD3x-EP devices are 3-state differential line drivers and differential-input line receivers that operate with 3-V power supply. 1 • • • • • • • • 1/8 Unit-Load Option Available (up to 256 Nodes on the Bus) Bus-Pin ESD Protection Exceeds 15 kV HBM Optional Driver Output Transition Times for Signaling Rates (1) of 1 Mbps, 5 Mbps, and 25 Mbps Low-Current Standby Mode: <1 μA Glitch-Free Power-Up and Power-Down Protection for Hot-Plugging Applications 5-V Tolerant Inputs Bus Idle, Open, and Short-Circuit Fail Safe Driver Current Limiting and Thermal Shutdown Meet or Exceed the Requirements of ANSI TIA/EIA-485-A and RS-422 Compatible Each driver and receiver has separate input and output pins for full-duplex bus communication designs. They are designed for balanced transmission lines and interoperation with ANSI TIA/EIA-485A, TIA/EIA-422-B, ITU-T v.11, and ISO 8482:1993 standard-compliant devices. The SN65HVD30, SN65HVD31, and SN65HVD32 are fully enabled with no external enabling pins. The SN65HVD33, SN65HVD34, and SN65HVD35 have active-high driver enables and active-low receiver enables. A low (less than 1 μA) standby current can be achieved by disabling both the driver and receiver. 2 Applications • • • • • • • • • • • (1) All devices are characterized for operation from –55°C to 125°C. Utility Meters DTE and DCE Interfaces Industrial, Process, and Building Automation Point-of-Sale (POS) Terminals and Networks Controlled Baseline One Assembly and Test Site One Fabrication Site Available in Military (–55°C/125°C) Temperature Range Extended Product Life Cycle Extended Product-Change Notification Product Traceability Device Information(1) PART NUMBER SN65HVD3x-EP PACKAGE BODY SIZE (NOM) SOIC (8) 4.90 mm x 3.91 mm SOIC (14) 8.65 mm x 3.91 mm (1) For all available packages, see the orderable addendum at the end of the datasheet. The signaling rate of a line is the number of voltage transitions that are made per second expressed in the units bps (bits per second). Typical Application Schematic Y R D Z A RT RT B R R DE RE Master RE D Slave B R A DE Z RT RT A B Z Y D D Y R Slave D R RE DE D 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. SN65HVD30-EP, SN65HVD31-EP, SN65HVD32-EP SN65HVD33-EP, SN65HVD34-EP, SN65HVD35-EP SGLS367E – SEPTEMBER 2006 – REVISED SEPTEMBER 2015 www.ti.com Table of Contents 1 2 3 4 5 6 7 Features .................................................................. Applications ........................................................... Description ............................................................. Revision History..................................................... Device Comparison ............................................... Pin Configuration and Functions ......................... Specifications......................................................... 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 7.10 7.11 8 1 1 1 2 3 4 5 Absolute Maximum Ratings ..................................... 5 ESD Ratings.............................................................. 5 Recommended Operating Conditions....................... 6 Thermal Information .................................................. 6 Electrical Characteristics: Driver ............................... 7 Electrical Characteristics: Receiver .......................... 8 Switching Characteristics: Driver .............................. 9 Switching Characteristics: Receiver........................ 10 Receiver Equalization Characteristics .................... 10 Dissipation Ratings .............................................. 10 Typical Characteristics .......................................... 11 Parameter Measurement Information ................ 13 9 Detailed Description ............................................ 17 9.1 9.2 9.3 9.4 Overview ................................................................. Functional Block Diagram ....................................... Feature Description................................................. Device Functional Modes........................................ 17 17 17 21 10 Application and Implementation........................ 23 10.1 Application Information.......................................... 23 10.2 Typical Application ............................................... 23 11 Power Supply Recommendations ..................... 27 12 Layout................................................................... 27 12.1 Layout Guidelines ................................................. 27 12.2 Layout Example .................................................... 27 13 Device and Documentation Support ................. 28 13.1 13.2 13.3 13.4 13.5 Related Links ........................................................ Community Resources.......................................... Trademarks ........................................................... Electrostatic Discharge Caution ............................ Glossary ................................................................ 28 28 28 28 28 14 Mechanical, Packaging, and Orderable Information ........................................................... 28 4 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision D (March 2012) to Revision E • 2 Page Added Handling Rating 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 Submit Documentation Feedback Copyright © 2006–2015, Texas Instruments Incorporated Product Folder Links: SN65HVD30-EP SN65HVD31-EP SN65HVD32-EP SN65HVD33-EP SN65HVD34-EP SN65HVD35-EP SN65HVD30-EP, SN65HVD31-EP, SN65HVD32-EP SN65HVD33-EP, SN65HVD34-EP, SN65HVD35-EP www.ti.com SGLS367E – SEPTEMBER 2006 – REVISED SEPTEMBER 2015 5 Device Comparison (1) Table 1. Available Options BASE PART NUMBER SN65HVD30MDREP (1) UNIT LOADS RECEIVER EQUALIZATION ENABLES SOIC MARKING 25 Mbps 1/2 No No HVD30EP (1) 5 Mbps 1/8 No No PREVIEW SN65HVD32MDREP (1) 1 Mbps 1/8 No No PREVIEW SN65HVD33MDREP 25 Mbps 1/2 No Yes HVD33EP SN65HVD34MDREP (1) 5 Mbps 1/8 No Yes PREVIEW SN65HVD35MDREP (1) 1 Mbps 1/8 No Yes PREVIEW SN65HVD31MDREP (1) SIGNALING RATE For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI Web site at www.ti.com. Product Preview Table 2. Improved Replacement Parts Part Number Replace With xxx3491 xxx3490 SN65HVD33: SN65HVD30: Better ESD protection (15 kV vs 2 kV or not specified), higher signaling rate (25 Mbps vs 20 Mbps), fractional unit load (64 nodes vs 32) MAX3491E MAX3490E SN65HVD33: SN65HVD30: Higher signaling rate (25 Mbps vs 12 Mbps), fractional unit load (64 nodes vs 32) MAX3076E MAX3077E SN65HVD33: SN65HVD30: Higher signaling rate (25 Mbps vs 16 Mbps), lower standby current (1 μA vs 10 μA) MAX3073E MAX3074E SN65HVD34: SN65HVD31: Higher signaling rate (5 Mbps vs 500 kbps), lower standby current (1 μA vs 10 μA) MAX3070E MAX3071E SN65HVD35: SN65HVD32: Higher signaling rate (1 Mbps vs 250 kbps), lower standby current (1 μA vs 10 μA) Copyright © 2006–2015, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: SN65HVD30-EP SN65HVD31-EP SN65HVD32-EP SN65HVD33-EP SN65HVD34-EP SN65HVD35-EP 3 SN65HVD30-EP, SN65HVD31-EP, SN65HVD32-EP SN65HVD33-EP, SN65HVD34-EP, SN65HVD35-EP SGLS367E – SEPTEMBER 2006 – REVISED SEPTEMBER 2015 www.ti.com 6 Pin Configuration and Functions D Package 8-Pin SOIC Top View VCC R D GND 1 8 2 7 3 6 4 5 D Package 14-Pin SOIC Top View NC R RE DE D GND GND A B Z Y 8 A 2 R 7 1 14 2 13 3 12 4 11 5 10 6 9 7 8 VCC VCC A B Z Y NC B NC - No internal connection Pins 6 and 7 are connected together internally Pins 13 and 14 are connected together internally 5 Y 3 D 6 Z Pin Functions PIN D (8-PIN) D (14-PIN) TYPE A 8 12 Bus input Receiver input (complementary to B) B 7 11 Bus input Receiver input (complementary to A) D 3 5 Digital input Driver data input DE — 4 Digital input Driver enable, active high Reference potential Local device ground No connect; must be left floating NAME DESCRIPTION GND 4 6, 7 NC — 1, 8 No connect R 2 2 Digital output Receive data output RE — 3 Digital output Receiver enable, active low VCC 1 13, 14 Supply Y 5 9 Bus output Driver output (complementary to Z) Z 6 10 Bus output Driver output (complementary to Y) 4 Submit Documentation Feedback 3-V to 3.6-V supply Copyright © 2006–2015, Texas Instruments Incorporated Product Folder Links: SN65HVD30-EP SN65HVD31-EP SN65HVD32-EP SN65HVD33-EP SN65HVD34-EP SN65HVD35-EP SN65HVD30-EP, SN65HVD31-EP, SN65HVD32-EP SN65HVD33-EP, SN65HVD34-EP, SN65HVD35-EP www.ti.com SGLS367E – SEPTEMBER 2006 – REVISED SEPTEMBER 2015 7 Specifications 7.1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted) (1) (2) MIN MAX UNIT –0.3 6 V Voltage range at any bus terminal (A, B, Y, Z) –9 14 V V(TRANS) Voltage input, transient pulse through 100 Ω (see Figure 21) (A, B, Y, Z) (3) –50 50 V VI Input voltage range (D, DE, RE) –0.5 7 V PD(cont) Continuous total power dissipation IO Output current (receiver output only, R) TJ Junction temperature Tstg Storage temperature range VCC Supply voltage range V(A), V(B), V(Y), V(Z) (1) (2) (3) (4) Internally limited (4) –65 11 mA 165 °C 150 °C Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. All voltage values, except differential I/O bus voltages, are with respect to network ground terminal. This tests survivability only and the output state of the receiver is not specified. The thermal shutdown protection circuit internally limits the continuous total power dissipation. Thermal shutdown typically occurs when the junction temperature reaches 165°C. 7.2 ESD Ratings MIN V(ESD) (1) (2) Electrostatic discharge Human body model (HBM), per ANSI/ESDA/JEDEC JS- Bus pins and GND 001, all pins (1) All pins ±16000 Charged device model (CDM), per JEDEC specification JESD22-C101, all pins (2) ±1000 ±4000 UNIT V JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process. Copyright © 2006–2015, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: SN65HVD30-EP SN65HVD31-EP SN65HVD32-EP SN65HVD33-EP SN65HVD34-EP SN65HVD35-EP 5 SN65HVD30-EP, SN65HVD31-EP, SN65HVD32-EP SN65HVD33-EP, SN65HVD34-EP, SN65HVD35-EP SGLS367E – SEPTEMBER 2006 – REVISED SEPTEMBER 2015 www.ti.com 7.3 Recommended Operating Conditions over operating free-air temperature range (unless otherwise noted) MIN VCC Supply voltage VI or VIC Voltage at any bus terminal (separately or common mode) NOM MAX 3 3.6 V –7 (1) 12 V 'HVD30, 'HVD33 25 'HVD31, 'HVD34 5 1/tUI Signaling rate RL Differential load resistance VIH High-level input voltage D, DE, RE VIL Low-level input voltage D, DE, RE VID Differential input voltage 'HVD32, 'HVD35 IOH High-level output current IOL Low-level output current TA Ambient still-air temperature (1) (2) UNIT Mbps 1 54 Driver Ω 60 2 VCC V 0 0.8 V –12 12 V –60 Receiver mA –8 Driver 60 Receiver 8 125 (2) –55 mA °C The algebraic convention, in which the least positive (most negative) limit is designated as minimum, is used in this data sheet. Long-term high-temperature storage and/or extended use at maximum recommended operating conditions may result in a reduction of overall device life. See http://www.ti.com/ep_quality for additional information on enhanced plastic packaging. 7.4 Thermal Information THERMAL METRIC (1) D (SOIC) D (SOIC) 8 PINS 14 PINS UNIT RθJA Junction-to-ambient thermal resistance 135 92 °C/W RθJC(top) Junction-to-case (top) thermal resistance 43 59 °C/W RθJB Junction-to-board thermal resistance 44 61 °C/W ψJT Junction-to-top characterization parameter 12.1 5.7 °C/W ψJB Junction-to-board characterization parameter 49.7 30.7 °C/W RθJC(bot) Junction-to-case (bottom) thermal resistance — — °C/W (1) 6 For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953. Submit Documentation Feedback Copyright © 2006–2015, Texas Instruments Incorporated Product Folder Links: SN65HVD30-EP SN65HVD31-EP SN65HVD32-EP SN65HVD33-EP SN65HVD34-EP SN65HVD35-EP SN65HVD30-EP, SN65HVD31-EP, SN65HVD32-EP SN65HVD33-EP, SN65HVD34-EP, SN65HVD35-EP www.ti.com SGLS367E – SEPTEMBER 2006 – REVISED SEPTEMBER 2015 7.5 Electrical Characteristics: Driver over recommended operating conditions (unless otherwise noted) PARAMETER VI(K) Input clamp voltage TEST CONDITIONS II = –18 mA MAX –1.5 IO = 0 |VOD(SS)| MIN TYP (1) V VCC + 0.1 2.3 Steady-state differential output voltage RL = 54 Ω, See Figure 10 (RS-485) RL = 100 Ω, See Figure 10 (RS-422) Vtest = –7 V to 12 V, See Figure 11 UNIT 1.5 2 2 2.3 V 1.5 Δ|VOD(SS)| Change in magnitude of steady-state differential output voltage between states RL = 54 Ω, See Figure 10 and Figure 11 VOD(RING) Differential output voltage overshoot and undershoot RL = 54 Ω, CL = 50 pF, See Figure 14 and Figure 12 VOC(PP) Peak-to-peak common-mode output voltage VOC(SS) Steady-state common-mode output voltage See Figure 13 1.6 2.3 V ΔVOC(SS) Change in steady-state common-mode See Figure 13 output voltage –0.05 0.05 V 'HVD30, 'HVD33 'HVD31, 'HVD32, 'HVD34, 'HVD35 'HVD30, 'HVD31, 'HVD32 IZ(Z) or IY(Z) High-impedance state output current 'HVD33, 'HVD34, 'HVD35 IZ(S) or IY(S) Short-circuit output current II Input current C(OD) Differential output capacitance (1) (2) –0.2 0.2 V 10% (2) V 0.5 See Figure 13 V 0.25 VCC = 0 V, VZ or VY = 12 V, Other input at 0 V 90 VCC = 0 V, VZ or VY = –7 V, Other input at 0 V VCC = 3 V or 0 V, DE = 0 V, VZ or VY = 12 V VCC = 3 V or 0 V, DE = 0 V, VZ or VY = –7 V VZ or VY = –7 V VZ or VY = 12 V –10 μA Other input at 0 V 90 –10 Other input at 0 V D, DE ±250 0 VOD = 0.4 sin (4E6πt) + 0.5 V, DE at 0 V mA 100 16 μA pF All typical values at 25°C with 3.3-V supply 10% of the peak-to-peak differential output voltage swing, per TIA/EIA-485 Copyright © 2006–2015, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: SN65HVD30-EP SN65HVD31-EP SN65HVD32-EP SN65HVD33-EP SN65HVD34-EP SN65HVD35-EP 7 SN65HVD30-EP, SN65HVD31-EP, SN65HVD32-EP SN65HVD33-EP, SN65HVD34-EP, SN65HVD35-EP SGLS367E – SEPTEMBER 2006 – REVISED SEPTEMBER 2015 www.ti.com 7.6 Electrical Characteristics: Receiver over recommended operating conditions (unless otherwise noted) PARAMETER TEST CONDITIONS VIT+ Positive-going differential input threshold voltage IO = –8 mA VIT– Negative-going differential input threshold voltage IO = 8 mA Vhys Hysteresis voltage (VIT+ – VIT–) VIK Enable-input clamp voltage MIN 'HVD30 'HVD33 IO(Z) High-impedance-state output current 50 V 0.4 VO = 0 or VCC, RE at VCC –1 Other input at 0 V VA or VB = 12 V, VCC = 0 V VA or VB = –7 V Other input at 0 V VA or VB = 12 V, VCC = 0 V VA or VB = –7 V VA or VB = –7 V, VCC = 0 V IIH Input current, RE VIH = 0.8 V or 2 V CID Differential input capacitance VID = 0.4 sin (4E6πt) + 0.5 V, DE at 0 V 1 0.05 0.1 0.06 0.1 –0.10 –0.04 –0.10 –0.03 VA or VB = 12 V 'HVD30, 'HVD33 mV 2.4 VA or VB = –7 V, VCC = 0 V Bus input current V –1.5 VA or VB = 12 V IA or IB –0.02 V VID = –200 mV, IO = 8 mA, See Figure 17 'HVD31, 'HVD32, 'HVD34, 'HVD35 UNIT -0.2 VID = 200 mV, IO = –8 mA, See Figure 17 Output voltage MAX –0.15 II = –18 mA VO TYP (1) 0.20 0.35 0.24 0.4 –0.35 –0.18 –0.25 –0.13 V μA mA μA –60 15 pF SUPPLY CURRENT 'HVD30 'HVD31, 'HVD32 'HVD33 ICC Supply current 1.8 'HVD34, 'HVD35 'HVD33, 'HVD34, 'HVD35 RE at VCC, D at VCC, DE at 0 V, No load (receiver disabled and driver disabled) 'HVD33 RE at 0 V, D at 0 V or VCC, DE at VCC, No load (receiver enabled and driver enabled) 2.1 RE at VCC, D at 0 V or VCC, DE at VCC No load (receiver disabled and driver enabled) 1.8 'HVD33 'HVD34, 'HVD35 8 6.4 RE at 0 V, D at 0 V or VCC, DE at 0 V, No load (receiver enabled and driver disabled) 'HVD34, 'HVD35 (1) 2.1 D at 0 V or VCC and no load mA 2.2 0.022 1.5 6.5 μA mA 6.2 All typical values at 25°C with 3.3-V supply Submit Documentation Feedback Copyright © 2006–2015, Texas Instruments Incorporated Product Folder Links: SN65HVD30-EP SN65HVD31-EP SN65HVD32-EP SN65HVD33-EP SN65HVD34-EP SN65HVD35-EP SN65HVD30-EP, SN65HVD31-EP, SN65HVD32-EP SN65HVD33-EP, SN65HVD34-EP, SN65HVD35-EP www.ti.com SGLS367E – SEPTEMBER 2006 – REVISED SEPTEMBER 2015 7.7 Switching Characteristics: Driver over recommended operating conditions (unless otherwise noted) PARAMETER Propagation delay time, low- to high-level output tPLH Propagation delay time, high- to low-level output tPHL TEST CONDITIONS 'HVD30, 'HVD33 4 10 'HVD31, 'HVD34 25 38 65 'HVD32, 'HVD35 120 175 305 'HVD30, 'HVD33 4 9 23 25 38 65 'HVD32, 'HVD35 120 175 305 2.5 5 18 tr Differential output signal fall time tf tsk(p) tPZH1 Pulse skew (|tPHL – tPLH|) Propagation delay time, highimpedance to high-level output 'HVD31, 'HVD34 20 37 60 'HVD32, 'HVD35 120 185 300 'HVD30, 'HVD33 2.5 5 18 'HVD31, 'HVD34 20 35 60 'HVD32, 'HVD35 120 180 300 'HVD30, 'HVD33 0.6 'HVD31, 'HVD34 2.0 'HVD32, 'HVD35 5.1 45 'HVD34 235 'HVD33 Propagation delay time, highlevel to high-impedance output 'HVD34 RL = 110 Ω, RE at 0 V, D = 3 V and S1 = Y, or D = 0 V and S1 = Z, See Figure 15 Propagation delay time, highimpedance to low-level output 65 35 190 'HVD34 RL = 110 Ω, RE at 0 V, D = 3 V and S1 = Z, or D = 0 V and S1 = Y, See Figure 16 tPZL2 (1) ns ns ns 490 30 120 'HVD35 tPZH2 ns 165 'HVD34 'HVD33 Propagation delay time, lowlevel to high-impedance output tPLZ ns 25 'HVD33 'HVD35 ns 490 'HVD35 tPZL1 ns ns 'HVD33 'HVD35 tPHZ RL = 54 Ω, CL = 50 pF, See Figure 14 UNIT 23 'HVD31, 'HVD34 'HVD30, 'HVD33 Differential output signal rise time MIN TYP (1) MAX ns 290 'HVD30 Propagation delay time, standby to high-level output 'HVD33 RL = 110 Ω, RE at 3 V, D = 3 V and S1 = Y, or D = 0 V and S1 = Z, See Figure 15 4000 'HVD30 Propagation delay time, standby to low-level output 'HVD33 RL = 110 Ω, RE at 3 V, D = 3 V and S1 = Z, or D = 0 V and S1 = Y, See Figure 16 4000 5000 5000 ns ns All typical values at 25°C with 3.3-V supply Copyright © 2006–2015, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: SN65HVD30-EP SN65HVD31-EP SN65HVD32-EP SN65HVD33-EP SN65HVD34-EP SN65HVD35-EP 9 SN65HVD30-EP, SN65HVD31-EP, SN65HVD32-EP SN65HVD33-EP, SN65HVD34-EP, SN65HVD35-EP SGLS367E – SEPTEMBER 2006 – REVISED SEPTEMBER 2015 www.ti.com 7.8 Switching Characteristics: Receiver over operating free-air temperature range (unless otherwise noted) PARAMETER tPLH Propagation delay time, low- to high-level output tPLH Propagation delay time, high- to low-level output TEST CONDITIONS TYP MAX 'HVD30, 'HVD33 26 60 'HVD31, 'HVD32, 'HVD34, 'HVD35 47 70 'HVD30, 'HVD33 29 60 'HVD31, 'HVD32, 'HVD34, 'HVD35 49 70 VID = –1.5 V to 1.5 V, CL = 15 pF, See Figure 18 'HVD30, 'HVD33 tsk(p) Pulse skew (|tPHL – tPLH|) 'HVD31, 'HVD34, 'HVD32, 'HVD35 tr Output signal rise time tf Output signal fall time tPHZ Output disable time from high level tPZH1 Output enable time to high level tPZH2 Propagation delay time, standby to high-level output tPLZ Output disable time from low level tPZL1 Output enable time to low level tPZL2 Propagation delay time, standby to low-level output MIN 'HVD30 10 'HVD33 18 DE at 3 V CL = 15 pF, See Figure 19 CL = 15 pF, See Figure 20 DE at 0 V ns ns 12.5 ns 20 ns 20 ns 5000 DE at 3 V 'HVD30 ns 4000 DE at 0 V 'HVD33 ns 12 10 'HVD30 UNIT 'HVD33 ns 20 ns 20 ns 4000 ns 5000 ns MAX UNIT 7.9 Receiver Equalization Characteristics over recommended operating conditions (unless otherwise noted) PARAMETER TEST CONDITIONS DEVICE 25 Mbps tj(pp) Peak-to-peak eye-pattern jitter Pseudo-random NRZ code with a bit pattern length of 216 – 1, Belden 3105A cable 10 Mbps 5 Mbps 3 Mbps 1 Mbps (1) (2) TYP (1) MIN 100 m 'HVD33 (2) PREVIEW 150 m 'HVD33 (2) PREVIEW 200 m 'HVD33 (2) PREVIEW 200 m 'HVD33 (2) PREVIEW 250 m 'HVD33 (2) PREVIEW 300 m 'HVD33 (2) PREVIEW 500 m 'HVD34 (2) PREVIEW 'HVD33 (2) PREVIEW 'HVD34 (2) PREVIEW (2) PREVIEW 500 m 1000 m 'HVD34 ns All typical values are at VCC = 5 V and temperature = 25°C. The SN65HVD33-EP and the SN65HVD34-EP do not have receiver equalization, but are specified for comparison. 7.10 Dissipation Ratings PARAM ETER DEVICE TEST CONDITIONS MIN MAX UNIT 'HVD30 (25 Mbps) 'HVD31 (5 Mbps) PD 197 RL = 60 Ω, CL = 50 pF, Input to D a 50% duty cycle square wave at indicated signaling rate, TA = 85°C 'HVD32 (1 Mbps) 197 RL = 60 Ω, CL = 50 pF, DE at VCC, RE at 0 V, Input to D a 50% duty cycle square wave at indicated signaling rate, TA = 85°C 'HVD35 (1 Mbps) 10 mW 193 'HVD33 (25 Mbps) 'HVD34 (5 Mbps) 213 Submit Documentation Feedback 193 mW 248 Copyright © 2006–2015, Texas Instruments Incorporated Product Folder Links: SN65HVD30-EP SN65HVD31-EP SN65HVD32-EP SN65HVD33-EP SN65HVD34-EP SN65HVD35-EP SN65HVD30-EP, SN65HVD31-EP, SN65HVD32-EP SN65HVD33-EP, SN65HVD34-EP, SN65HVD35-EP www.ti.com SGLS367E – SEPTEMBER 2006 – REVISED SEPTEMBER 2015 7.11 Typical Characteristics 60 55 TA = 25°C RL = 54 W RE = VCC CL = 50 pF DE = VCC 55 ICC - RMS Supply Current - mA 50 ICC - RMS Supply Current - mA TA = 25°C RL = 54 W RE = VCC CL = 50 pF DE = VCC 45 VCC = 3.3 V 40 35 50 VCC = 3.3 V 45 40 35 30 30 0 5 10 15 20 0 25 1 2 Figure 1. 'HVD30, 'HVD33 RMS Supply Current Signaling Rate 4 5 Figure 2. 'HVD31, 'HVD34 RMS Supply Current Signaling Rate 250 60 TA = 25°C RL = 54 W RE = VCC CL = 50 pF DE = VCC 55 TA = 25°C RE = 0 V DE = 0 V 200 150 II - Bus Input Current - mA ICC - RMS Supply Current - mA 3 Signaling Rate - Mbps Signaling Rate - Mbps 50 VCC = 3.3 V 45 40 100 50 VCC = 3.3 V 0 –50 –100 35 –150 –200 –7 30 0 0.2 0.4 0.6 0.8 1 –4 –1 Signaling Rate - Mbps Figure 3. 'HVD32, 'HVD35 RMS Supply Current Signaling Rate 5 8 11 14 Figure 4. Bus Input Current vs Input Voltage 0.14 60 IOL - Driver Low-Level Output Current - A TA = 25°C RE = 0 V DE = 0 V 40 II - Bus Input Current - uA 2 VI - Bus Input Voltage - V 20 0 VCC = 3.3 V -20 -40 VCC = 3.3 V DE = VCC D=0V 0.12 0.1 0.08 0.06 0.04 0.02 0 –0.02 -60 -7 -4 -1 2 5 8 11 14 VI - Bus Input Voltage - V Figure 5. 'HVD31, 'HVD32, 'HVD34, 'HVD35 Bus Input Current vs Input Voltage Copyright © 2006–2015, Texas Instruments Incorporated 0 0.5 1 1.5 2 2.5 3 3.5 VOL - Low-Level Output Voltage - V Figure 6. Driver Low-Level Output Current vs Low-Level Output Voltage Submit Documentation Feedback Product Folder Links: SN65HVD30-EP SN65HVD31-EP SN65HVD32-EP SN65HVD33-EP SN65HVD34-EP SN65HVD35-EP 11 SN65HVD30-EP, SN65HVD31-EP, SN65HVD32-EP SN65HVD33-EP, SN65HVD34-EP, SN65HVD35-EP SGLS367E – SEPTEMBER 2006 – REVISED SEPTEMBER 2015 www.ti.com Typical Characteristics (continued) 2.2 VCC = 3.3 V DE = VCC D=0V –0.01 VOD - Driver Differential Output Voltage - V IOH - Driver High-Level Output Current - A 0.01 –0.03 –0.05 –0.07 –0.09 –0.11 –0.13 VCC = 3.3 V DE = VCC D = VCC 2.1 2.0 1.9 1.8 0 0.5 1 1.5 2 2.5 3 –40 3.5 –15 10 35 60 85 VOH - High-Level Output Voltage - V TA - Free-Air Temperature - °C Figure 7. Driver High-Level Output Current vs High-Level Output Voltage Figure 8. Driver Differential Output Voltage vs Free-Air Temperature 40 TA = 25°C RL = 54 W D = VCC DE = VCC IO - Driver Output Current - mA 35 30 25 20 15 10 5 0 0 0.5 1 1.5 2 2.5 3 3.5 VCC Supply Voltage - V Figure 9. Driver Output Current vs Supply Voltage 12 Submit Documentation Feedback Copyright © 2006–2015, Texas Instruments Incorporated Product Folder Links: SN65HVD30-EP SN65HVD31-EP SN65HVD32-EP SN65HVD33-EP SN65HVD34-EP SN65HVD35-EP SN65HVD30-EP, SN65HVD31-EP, SN65HVD32-EP SN65HVD33-EP, SN65HVD34-EP, SN65HVD35-EP www.ti.com SGLS367E – SEPTEMBER 2006 – REVISED SEPTEMBER 2015 8 Parameter Measurement Information VCC DE II Y IY VOD 0 or 3 V Z RL IZ VI VZ VY Figure 10. Driver VOD Test Circuit and Voltage and Current Definitions 375 Ω ±1% VCC DE D Y VOD 0 or 3 V 60 Ω ±1% + _ −7 V < V(test) < 12 V Z 375 Ω ±1% Figure 11. Driver VOD With Common-Mode Loading Test Circuit VOD(SS) VOD(RING) 0 V Differential VOD(RING) –VOD(SS) Figure 12. VOD(RING) Waveform and Definitions VOD(RING) is measured at four points on the output waveform, corresponding to overshoot and undershoot from the VOD(H) and VOD(L) steady state values. VCC DE Input D 27 Ω ± 1% Y Y VY Z VZ VOC(PP) Z 27 Ω ± 1% CL = 50 pF ±20% VOC ∆VOC(SS) VOC Input: PRR = 500 kHz, 50% Duty Cycle, tr < 6 ns, tf < 6 ns, ZO = 50 Ω Figure 13. Test Circuit and Definitions for Driver Common-Mode Output Voltage Copyright © 2006–2015, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: SN65HVD30-EP SN65HVD31-EP SN65HVD32-EP SN65HVD33-EP SN65HVD34-EP SN65HVD35-EP 13 SN65HVD30-EP, SN65HVD31-EP, SN65HVD32-EP SN65HVD33-EP, SN65HVD34-EP, SN65HVD35-EP SGLS367E – SEPTEMBER 2006 – REVISED SEPTEMBER 2015 www.ti.com Parameter Measurement Information (continued) Y » W Z W » A. Generator: PRR = 500 kHz, 50% Duty Cycle, tr < 6 ns, tf < 6 ns, ZO = 50 Ω Figure 14. Driver Switching Test Circuit and Voltage Waveforms D 3V 0V 3V S1 Y Z Y S1 D VO 1.5 V 1.5 V VI 0.5 V t PZH(1 & 2) Z 0V V OH DE Input Generator VI RL = 110 W ±1% CL = 50 pF ±20% 50 W VO 2.3 V ~0V tPHZ A. Generator: PRR = 500 kHz, 50% Duty Cycle, tr < 6 ns, tf < 6 ns, ZO = 50 Ω B. CL Includes Fixture and Instrumentation Capacitance Figure 15. Driver High-Level Output Enable and Disable Time Test Circuit and Voltage Waveforms D 3V 0V VCC S1 Z Y RL = 110 Ω ± 1% Y A. 1.5 V VO DE VI 1.5 V VI S1 D Input Generator 3V 0V Z t PZL(1&2) t PLZ VCC CL = 50 pF ±20% 50 Ω 0.5 V CL Includes Fixture and Instrumentation Capacitance VO 2.3 V VOL Generator: PRR = 500 kHz, 50% Duty Cycle, tr < 6 ns, tf < 6 ns, ZO = 50 Ω Figure 16. Driver Low-Level Output Enable and Disable Time Test Circuit and Voltage Waveforms IA VA VA + VB 2 VIC A R VID IO B VB IB RE II VO VI Figure 17. Receiver Voltage and Current Definitions 14 Submit Documentation Feedback Copyright © 2006–2015, Texas Instruments Incorporated Product Folder Links: SN65HVD30-EP SN65HVD31-EP SN65HVD32-EP SN65HVD33-EP SN65HVD34-EP SN65HVD35-EP SN65HVD30-EP, SN65HVD31-EP, SN65HVD32-EP SN65HVD33-EP, SN65HVD34-EP, SN65HVD35-EP www.ti.com SGLS367E – SEPTEMBER 2006 – REVISED SEPTEMBER 2015 Parameter Measurement Information (continued) 3V A R Input Generator VI 50 Ω 1.5 V 0V B 1.5 V 0V CL = 15 pF ±20% RE 1.5 V VI VO t PLH VO t PHL 90% 90% 1.5 V 10% tr A. CL Includes Fixture and Instrumentation Capacitance B. Generator: PRR = 500 kHz, 50% Duty Cycle, tr < 6 ns, tf < 6 ns, ZO = 50 Ω VOH 1.5 V 10% V OL tf Figure 18. Receiver Switching Test Circuit and Voltage Waveforms 1.5 V V CC A R 0V B VI S1 C L = 15 pF ±20% RE Input Generator 1 k W ±1% VO 3V A VI 1.5V 1.5V 0V B t PHZ t PZH(1 & 2) V OH 50 W 1.5 V VO 0.5V ~0 V A. Generator: PRR = 500 kHz, 50% Duty Cycle, tr < 6 ns, tf < 6 ns, ZO = 50 Ω Figure 19. Receiver High-Level Enable and Disable Time Test Circuit and Voltage Waveforms 0V V CC A R 1.5 V V O 1 k W ±1% B RE Input V Generator I 50 W C L = 15 pF ±20% S1 3V A VI 1.5V 1.5V B 0V t PZL(1 & 2) VO t PLZ 1.5 V V CC 0.5 V V OL A. Generator: PRR = 500 kHz, 50% Duty Cycle, tr < 6 ns, tf < 6 ns, ZO = 50 Ω Figure 20. Receiver Enable Time From Standby (Driver Disabled) Copyright © 2006–2015, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: SN65HVD30-EP SN65HVD31-EP SN65HVD32-EP SN65HVD33-EP SN65HVD34-EP SN65HVD35-EP 15 SN65HVD30-EP, SN65HVD31-EP, SN65HVD32-EP SN65HVD33-EP, SN65HVD34-EP, SN65HVD35-EP SGLS367E – SEPTEMBER 2006 – REVISED SEPTEMBER 2015 www.ti.com Parameter Measurement Information (continued) 0 V or 3 V DE A Y D R Z 100 W ±1% + - Pulse Generator 15 ms duration 1% Duty Cycle tr, tf £ 100 ns 100 W ±1% B RE 0 V or 3 V + - Figure 21. Test Circuit, Transient Over Voltage Test 16 Submit Documentation Feedback Copyright © 2006–2015, Texas Instruments Incorporated Product Folder Links: SN65HVD30-EP SN65HVD31-EP SN65HVD32-EP SN65HVD33-EP SN65HVD34-EP SN65HVD35-EP SN65HVD30-EP, SN65HVD31-EP, SN65HVD32-EP SN65HVD33-EP, SN65HVD34-EP, SN65HVD35-EP www.ti.com SGLS367E – SEPTEMBER 2006 – REVISED SEPTEMBER 2015 9 Detailed Description 9.1 Overview The SN65HVD3x-EP devices are low-power, full-duplex RS-485 transceivers available in three speed grades suitable for data transmission of 1 Mbps, 5 Mbps, and 50 Mbps. The SN65HVD30, SN65HVD31, and SN65HVD32 devices are fully enabled with no external enabling pins. The SN65HVD33, SN65HVD34, and SN65HVD35 devices have active-high driver enables and active-low receiver enables. A standby current of less than 1 µA can be achieved by disabling both driver and receiver. 9.2 Functional Block Diagram VCC VCC A R A R R R B B RE VCC DE Z D Z D D D Y Y GND GND a) SN65HVD33, SN65HVD34, SN65HVD35 b) SN65HVD30, SN65HVD31, SN65HVD32 9.3 Feature Description 9.3.1 Low-Power Standby Mode When both the driver and receiver are disabled (DE is low and RE is high), the device is in standby mode. If the enable inputs are in this state for less than 60 ns, the device does not enter standby mode. This guards against inadvertently entering standby mode during driver or receiver enabling. The device in standby mode only when the enable inputs are held in this state for 300 ns or more. In this low-power standby mode, most internal circuitry is powered down, and the supply current is typically less than 1 nA. When either the driver or the receiver is reenabled, the internal circuitry becomes active. 12 R RE 2 11 A B 3 Low-Power Standby DE 4 9 D 5 10 Y Z Figure 22. Low-Power Standby Logic Diagram If only the driver is re-enabled (DE transitions to high) the driver outputs are driven according to the D input after the enable times given by tPZH2 and tPZL2 in the driver switching characteristics. If the D input is open when the driver is enabled, the driver output defaults to Y high and Z low, in accordance with the driver-failsafe feature. Copyright © 2006–2015, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: SN65HVD30-EP SN65HVD31-EP SN65HVD32-EP SN65HVD33-EP SN65HVD34-EP SN65HVD35-EP 17 SN65HVD30-EP, SN65HVD31-EP, SN65HVD32-EP SN65HVD33-EP, SN65HVD34-EP, SN65HVD35-EP SGLS367E – SEPTEMBER 2006 – REVISED SEPTEMBER 2015 www.ti.com Feature Description (continued) If only the receiver is re-enabled (RE transitions to low) the receiver output is driven according to the state of the bus inputs (A and B) after the enable times given by tPZH2 and tPZL2 in the receiver switching characteristics. If there is no valid state on the bus the receiver responds as described in the failsafe operation section. If both the receiver and driver are re-enabled simultaneously, the receiver output is driven according to the state of the bus inputs (A and B) and the driver output is driven according to the D input. Note that the state of the active driver affects the inputs to the receiver. Therefore, the receiver outputs are valid as soon as the driver outputs are valid. 9.3.2 Driver Output Current Limiting The RS-485 standard (ANSI/TIA/EIA-485-A or equivalently ISO 8482) specifies a 250-mA driver output current limit to prevent damage caused by data contention on the bus. That applies in the event that two or more transceivers drive the bus to opposing states at the same time. The SN65HVD3x-EP family of devices includes current-limiting circuitry that prevents damage under these conditions. NOTE This current limit prevents damage during the bus contention, but the logic state of the bus can be indeterminate as specified by the standard, so communication errors can occur. In a specific combination of circumstances, a condition can occur in which current through the bus pin exceeds the 250-mA limit. This combination of conditions is not normally included in RS-485 applications: • Loading capacitance on the pin is less than 500 pF • The bus pin is directly connected to a voltage more negative than –1 V • The device is supplied with VCC equal to or greater than 3.3 V • The driver is enabled • The bus pin is driving to the logic high state In these specific conditions, the normal current-limit circuitry and thermal-shutdown circuitry does not limit or shutdown the current flow. If the current is allowed to continue, the device heats up in a localized area near the driver outputs, and the device can be damaged. Typical RS-485 twisted-pair cable has a capacitance of approximately 50 pF/meter. Therefore, it is expected that 10 meters of cable can provide sufficient capacitance to prevent this latch-up condition. The –7 to +12-V common mode range specified by RS-485 is intended to allow communication between transceivers separated by significant distances when ground offsets may occur due to temporary current surges, electrical noise, and so on. Under those circumstances, the inherent cable needed to connect separated transceivers ensures that the conditions previously listed do not occur. For a transceiver separated by only a short cable length or backplane applications, it is unusual for there to be a steady-state negative common-mode voltage. It is possible for a negative power supply to be shorted to the bus lines due to miswiring or cable damage; however, this is a different root cause fault, and robust devices such as the SN65HVD178x family should be used for surviving power supply or miswiring faults. The 250-mA current limit in the RS-485 standard is intended to prevent damage caused by data contention on the bus; that is, in the event that two or more transceivers drive the bus to different states at the same time. These devices are not damaged under these conditions because all RS-485 drivers have output impedance sufficient to prevent the direct connection condition stated previously. Typical RS-485 driver output impedance is on the order of 10 Ω to 30 Ω. 9.3.3 Hot-Plugging These devices are designed to operate in hot swap or hot pluggable applications. Key features for hot-pluggable applications are: • Power-up • Power-down glitch-free operation • Default disabled input/output pins • Receiver failsafe 18 Submit Documentation Feedback Copyright © 2006–2015, Texas Instruments Incorporated Product Folder Links: SN65HVD30-EP SN65HVD31-EP SN65HVD32-EP SN65HVD33-EP SN65HVD34-EP SN65HVD35-EP SN65HVD30-EP, SN65HVD31-EP, SN65HVD32-EP SN65HVD33-EP, SN65HVD34-EP, SN65HVD35-EP www.ti.com SGLS367E – SEPTEMBER 2006 – REVISED SEPTEMBER 2015 Feature Description (continued) As shown in Figure 9, an internal power-on reset circuit keeps the driver outputs in a high-impedance state until the supply voltage has reached a level at which the device reliably operates. This ensures that no spurious bits are transmitted on the bus pin outputs as the power supply turns on or turns off. As shown in the Device Functional Modes, the enable inputs have the feature of default disable on both the driver enable and receiver enable. This ensures that the device neither drives the bus nor reports data on the R pin until the associated controller actively drives the enable pins. 9.3.4 Receiver Failsafe The differential receivers of the SN65HVD3x-EP family are failsafe to invalid bus states caused by: • Open bus conditions such as a disconnected connector • Shorted bus conditions such as cable damage shorting the twisted-pair together • Idle bus conditions that occur when no driver on the bus is actively driving In any of these cases, the differential receiver outputs a failsafe logic high state so that the output of the receiver is not indeterminate. Receiver failsafe is accomplished by offsetting the receiver thresholds such that the input indeterminate range does not include zero volts differential. In order to comply with the RS-422 and RS-485 standards, the receiver output must output a high when the differential input VID is more positive than 200 mV, and must output a low when VID is more negative than –200 mV. The receiver parameters which determine the failsafe performance are VIT+, VIT–, and VHYS (the separation between VIT+ and VIT–. As shown in the Electrical Characteristics: Receiver table, differential signals more negative than –200 mV always cause a low receiver output, and differential signals more positive than 200 mV always cause a high receiver output. When the differential input signal is close to zero, it is still above the VIT+ threshold, and the receiver output is high. Only when the differential input is more than VHYS below VIT+ does the receiver output transition to a low state. Therefore, the noise immunity of the receiver inputs during a bus fault conditions includes the receiver hysteresis value (VHYS) as well as the value of VIT+. R VHYS 50mV -70 -20 0 70 VID - mV Vnoise-max = 140mVpp Figure 23. SN65HVD30-35 Noise Immunity Under Bus Fault Conditions 9.3.5 Safe Operation With Bus Contention These devices incorporate a driver current limit of 250 mA across the RS-485 common-mode range of –7 V to +12 V. As stated in the Application Guidelines for TIA/EIA-485-A (1), this sets a practical limitation to prevent damage during bus contention events. Contention can occur during system initialization, during system faults, or whenever two or more drivers are active at the same time. (1) TIA/EIA Telecommunications System Bulletin TSB89, Application Guidelines for TIA/EIA-485-A Copyright © 2006–2015, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: SN65HVD30-EP SN65HVD31-EP SN65HVD32-EP SN65HVD33-EP SN65HVD34-EP SN65HVD35-EP 19 SN65HVD30-EP, SN65HVD31-EP, SN65HVD32-EP SN65HVD33-EP, SN65HVD34-EP, SN65HVD35-EP SGLS367E – SEPTEMBER 2006 – REVISED SEPTEMBER 2015 www.ti.com Feature Description (continued) Figure 24 shows a 2-node system to demonstrate bus contention by forcing both drivers to be active in opposing states. Vcc2 Vcc1 ALWAYS HIGH D ALWAYS ENABLED DE ±7V OFFSET GND 1 GND 2 Node 1 D-pin Node 2 DE -pin Bus Vdiff CONTENTION Figure 24. Bus Contention Example Figure 25 shows typical operation in a bus contention event. The bottom trace illustrates how the SN65HVD33 device at Node 1 continues normal operation after a contention event between the two drivers with a –7-V ground offset on Node 2. This illustrates how the SN65HVD3x-EP family of devices operates robustly in spite of bus contention faults, even with large common-mode offsets. Node 1 D-pin -7V offset Node 2 DE-pin Bus with intermittent contention Figure 25. SN65HVD3x-EP Drivers Operate Correctly After Bus Contention Faults 20 Submit Documentation Feedback Copyright © 2006–2015, Texas Instruments Incorporated Product Folder Links: SN65HVD30-EP SN65HVD31-EP SN65HVD32-EP SN65HVD33-EP SN65HVD34-EP SN65HVD35-EP SN65HVD30-EP, SN65HVD31-EP, SN65HVD32-EP SN65HVD33-EP, SN65HVD34-EP, SN65HVD35-EP www.ti.com SGLS367E – SEPTEMBER 2006 – REVISED SEPTEMBER 2015 9.4 Device Functional Modes Table 3-Table 6 list the functional modes of the S65HVDxx Devices. Table 3. SN65HVD33, SN65HVD34, SN65HVD35 Driver INPUTS OUTPUTS D DE Y Z H H H L H L H L X L or open Z Z Open H L H Table 4. SN65HVD33, SN65HVD34, SN65HVD35 Receiver DIFFERENTIAL INPUTS VID = V(A) – V(B) ENABLE RE OUTPUT R VID ≤ –0.2 V L L –0.2 V < VID < –0.02 V L — –0.02 V ≤ VID L H X H or open Z Open Circuit L H Idle circuit L H Short Circuit, V(A) = V(B) L H Table 5. SN65HVD30, SN65HVD31, SN65HVD32 Driver OUTPUTS INPUT D Y Z H H L L L H Open L H Table 6. SN65HVD30, SN65HVD31, SN65HVD32 Receiver DIFFERENTIAL INPUTS VID = V(A) – V(B) OUTPUT R VID ≤ –0.2 V L –0.02 V ≤ VID H Open Circuit H Idle circuit H Short Circuit, V(A) = V(B) H Copyright © 2006–2015, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: SN65HVD30-EP SN65HVD31-EP SN65HVD32-EP SN65HVD33-EP SN65HVD34-EP SN65HVD35-EP 21 SN65HVD30-EP, SN65HVD31-EP, SN65HVD32-EP SN65HVD33-EP, SN65HVD34-EP, SN65HVD35-EP SGLS367E – SEPTEMBER 2006 – REVISED SEPTEMBER 2015 www.ti.com D and DE Input RE Input VCC VCC 130 kW Input 470 W Input 470 W 9V 9V 125 kW A Input B Input VCC VCC R1 22 V R1 22 V R3 R3 Input Input 22 V R2 22 V R2 R Output Y and Z Outputs VCC VCC 16 V 5W Output Output 16 V 9V Figure 26. Equivalent Input and Output Schematic Diagrams Table 7. Input Attenuator Resistance Values PART NUMBER 22 R1, R2 R3 SN65HVD30, SN65HVD33 9 kΩ 45 kΩ SN65HVD31, SN65HVD32, SN65HVD34, SN65HVD35 36 kΩ 180 kΩ Submit Documentation Feedback Copyright © 2006–2015, Texas Instruments Incorporated Product Folder Links: SN65HVD30-EP SN65HVD31-EP SN65HVD32-EP SN65HVD33-EP SN65HVD34-EP SN65HVD35-EP SN65HVD30-EP, SN65HVD31-EP, SN65HVD32-EP SN65HVD33-EP, SN65HVD34-EP, SN65HVD35-EP www.ti.com SGLS367E – SEPTEMBER 2006 – REVISED SEPTEMBER 2015 10 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 10.1 Application Information The SN65HVD3x-EP family consists of full-duplex RS-485 transceivers commonly used for asynchronous data transmissions. Full-duplex implementation requires two signal pairs (four wires), and allows each node to transmit data on one pair while simultaneously receiving data on the other pair. To eliminate line reflections, each cable end is terminated with a termination resistor (RT) whose value matches the characteristic impedance (Z0) of the cable. This method, known as parallel termination, allows for higher data rates over longer cable length. Y R D Z A RT RT B R R DE RE Master RE D Slave B R A DE Z RT RT A B Z Y D D Y R Slave D R RE DE D Figure 27. Typical RS-485 Network With Full-Duplex Transceivers 10.2 Typical Application A full-duplex RS-485 network consists of multiple transceivers connecting in parallel to two bus cables. On one signal pair, a master driver transmits data to multiple slave receivers. The master driver and slave receivers can remain fully enabled at all times. On the other signal pair, multiple slave drivers transmit data to the master receiver. To avoid bus contention, the slave drivers must be intermittently enabled and disabled such that only one driver is enabled at any time, as in half-duplex communication. The master receiver can remain fully enabled at all times. Because the driver cannot be disabled, only connect one driver to the bus when using the SN65HVD30, SN65HVD31, or SN65HVD32 devices. Copyright © 2006–2015, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: SN65HVD30-EP SN65HVD31-EP SN65HVD32-EP SN65HVD33-EP SN65HVD34-EP SN65HVD35-EP 23 SN65HVD30-EP, SN65HVD31-EP, SN65HVD32-EP SN65HVD33-EP, SN65HVD34-EP, SN65HVD35-EP SGLS367E – SEPTEMBER 2006 – REVISED SEPTEMBER 2015 www.ti.com Typical Application (continued) VCC VCC A R A R R R B RE B RE DE DE VCC D D Z D Z D Y Y GND GND a) Master enable control b) Slave enable control Figure 28. Full-Duplex Transceiver Configurations 10.2.1 Design Requirements RS-485 is a robust electrical standard suitable for long-distance networking that may be used in a wide range of applications with varying requirements, such as distance, data rate, and number of nodes. 10.2.1.1 Data Rate and Bus Length There is an inverse relationship between data rate and bus length, meaning the higher the data rate, the shorter the cable length; and conversely, the lower the data rate, the longer the cable can be without introducing data errors. While most RS-485 systems use data rates between 10 kbps and 100 kbps, some applications require data rates up to 250 kbps at distances of 4000 feet and longer. Longer distances are possible by allowing for small signal jitter of up to 5 or 10%. 10000 Cable Length (ft) 5%, 10%, and 20% Jitter 1000 Conservative Characteristics 100 10 100 1k 10k 100k 1M 10M 100M Data Rate (bps) Figure 29. Cable Length vs Data Rate Characteristic Even higher data rates are achievable (such as 26 Mbps for the SN65HVD30 and SN65HVD33 devices) in cases where the interconnect is short enough (or has suitably low attenuation at signal frequencies) to not degrade the data. 24 Submit Documentation Feedback Copyright © 2006–2015, Texas Instruments Incorporated Product Folder Links: SN65HVD30-EP SN65HVD31-EP SN65HVD32-EP SN65HVD33-EP SN65HVD34-EP SN65HVD35-EP SN65HVD30-EP, SN65HVD31-EP, SN65HVD32-EP SN65HVD33-EP, SN65HVD34-EP, SN65HVD35-EP www.ti.com SGLS367E – SEPTEMBER 2006 – REVISED SEPTEMBER 2015 Typical Application (continued) 10.2.1.2 Stub Length When connecting a node to the bus, the distance between the transceiver inputs and the cable trunk, known as the stub, must be as short as possible. Stubs present a nonterminated piece of bus line that can introduce reflections as the length of the stub increases. As a general guideline, the electrical length, or round-trip delay, of a stub must be less than one-tenth of the rise time of the driver; thus giving a maximum physical stub length as shown in Equation 1. Lstub ≤ 0.1 × tr × v × c where: • • • tr is the 10/90 rise time of the driver c is the speed of light (3 × 108 m/s) v is the signal velocity of the cable or trace as a factor of c (1) Per Equation 1, Table 8 shows the maximum cable-stub lengths for the minimum driver output rise times of the SN65HVD3x-EP full-duplex family of transceivers for a signal velocity of 78%. Table 8. Maximum Stub Length MAXIMUM STUB LENGTH DEVICE MINIMUM DRIVER OUTPUT RISE TIME (ns) (m) (ft) SN65HVD30 4 0.1 0.3 SN65HVD31 25 0.6 1.9 SN65HVD32 120 2.8 9.2 SN65HVD33 4 0.1 0.3 SN65HVD34 25 0.6 1.9 SN65HVD35 120 2.8 9.2 10.2.1.3 Bus Loading The RS-485 standard specifies that a compliant driver must be able to driver 32 unit loads (UL), where 1 unit load represents a load impedance of approximately 12 kΩ. Because the SN65HVD30 and SN65HVD33 devices are 1/2 UL transceivers, it is possible to connect up to 64 receivers to the bus. Likewise, the SN65HVD31, SN65HVD32, SN65HVD34, and SN65HVD35 devices are 1/8 UL transceivers that can support up to 256 receivers. Copyright © 2006–2015, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: SN65HVD30-EP SN65HVD31-EP SN65HVD32-EP SN65HVD33-EP SN65HVD34-EP SN65HVD35-EP 25 SN65HVD30-EP, SN65HVD31-EP, SN65HVD32-EP SN65HVD33-EP, SN65HVD34-EP, SN65HVD35-EP SGLS367E – SEPTEMBER 2006 – REVISED SEPTEMBER 2015 www.ti.com 10.2.2 Detailed Design Procedure To protect bus nodes against high-energy transients, the implementation of external transient protection devices is necessary (see Figure 30). 3.3 V 100 nF R1 10 kΩ VCC TVS A R RxD B RE DIR MCU/ UART R2 R1 SN65HVD33 DE DIR TVS Z D TxD Y 10 kΩ GND R2 Figure 30. Transient Protection Against ESD, EFT, and Surge Transients Table 9. Bill of Materials DEVICE FUNCTION ORDER NUMBER MANUFACTURER XCVR 3.3-V Full-Duplex RS-485 Transceiver SN65HVD33 R1, R2 10-Ω, Pulse-Proof Thick-Film Resistor CRCW060310RJNEAHP Vishay TI TVS Bidirectional 400-W Transient Suppressor CDSOT23-SM712 Bourns 10.2.3 Application Curve Signals from top to bottom: D, Y, Z, VOD Figure 31. SN65HVD33-EP Transient Waveform 26 Submit Documentation Feedback Copyright © 2006–2015, Texas Instruments Incorporated Product Folder Links: SN65HVD30-EP SN65HVD31-EP SN65HVD32-EP SN65HVD33-EP SN65HVD34-EP SN65HVD35-EP SN65HVD30-EP, SN65HVD31-EP, SN65HVD32-EP SN65HVD33-EP, SN65HVD34-EP, SN65HVD35-EP www.ti.com SGLS367E – SEPTEMBER 2006 – REVISED SEPTEMBER 2015 11 Power Supply Recommendations To ensure reliable operation at all data rates and supply voltages, each supply must be decoupled with a 100-nF ceramic capacitor located as close as possible to the supply pins. This helps to reduce supply voltage ripple present on the outputs of switched-mode power supplies and also helps compensate for the resistance and inductance of the PCB power planes. 12 Layout 12.1 Layout Guidelines Robust and reliable bus-node design often requires the use of external transient protection devices to protect against EFT and surge transients that can occur in industrial environments. Because these transients have a wide frequency bandwidth (from approximately 3 MHz to 3 GHz), high-frequency layout techniques must be applied during PCB design. • Place the protection circuitry close to the bus connector to prevent noise transients from entering the board. • Use VCC and ground planes to provide low-inductance. High-frequency currents follow the path of least inductance and not the path of least impedance. • Design the protection components into the direction of the signal path. Do not force the transients currents to divert from the signal path to reach the protection device. • Apply 100-nF to 220-nF bypass capacitors as close as possible to the VCC pins of transceiver, UART, and controller ICs on the board. • Use at least two vias for VCC and ground connections of bypass capacitors and protection devices to minimize effective via inductance. • Use 1-kΩ to 10-kΩ pullup or pulldown resistors for enable lines to limit noise currents in these lines during transient events. • Insert series pulse-proof resistors into the A and B bus lines if the TVS clamping voltage is higher than the specified maximum voltage of the transceiver bus pins. These resistors limit the residual clamping current into the transceiver and prevent it from latching up. • While pure TVS protection is sufficient for surge transients up to 1 kV, higher transients require metal-oxide varistors (MOVs), which reduces the transients to a few hundred volts of clamping voltage and transient blocking units (TBUs) that limit transient current to 200 mA. 12.2 Layout Example 5 Via to ground 4 Via to VCC R 6 R 1 R MCU R 7 5 R TVS 6 R R 7 5 1 R 5 R 5 JMP C TVS SN65HVD33 Figure 32. SN65HVD33-EP Layout Example Copyright © 2006–2015, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: SN65HVD30-EP SN65HVD31-EP SN65HVD32-EP SN65HVD33-EP SN65HVD34-EP SN65HVD35-EP 27 SN65HVD30-EP, SN65HVD31-EP, SN65HVD32-EP SN65HVD33-EP, SN65HVD34-EP, SN65HVD35-EP SGLS367E – SEPTEMBER 2006 – REVISED SEPTEMBER 2015 www.ti.com 13 Device and Documentation Support 13.1 Related Links The table below lists quick access links. Categories include technical documents, support and community resources, tools and software, and quick access to sample or buy. Table 10. Related Links PARTS PRODUCT FOLDER SAMPLE & BUY TECHNICAL DOCUMENTS TOOLS & SOFTWARE SUPPORT & COMMUNITY SN65HVD30-EP Click here Click here Click here Click here Click here SN65HVD31-EP Click here Click here Click here Click here Click here SN65HVD32-EP Click here Click here Click here Click here Click here SN65HVD33-EP Click here Click here Click here Click here Click here SN65HVD34-EP Click here Click here Click here Click here Click here SN65HVD35-EP Click here Click here Click here Click here Click here 13.2 Community Resources The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of Use. TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help solve problems with fellow engineers. Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and contact information for technical support. 13.3 Trademarks E2E is a trademark of Texas Instruments. All other trademarks are the property of their respective owners. 13.4 Electrostatic Discharge Caution These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. 13.5 Glossary SLYZ022 — TI Glossary. This glossary lists and explains terms, acronyms, and definitions. 14 Mechanical, Packaging, and Orderable Information The following pages include mechanical, packaging, and orderable information. This information is the most current data available for the designated devices. This data is subject to change without notice and revision of this document. For browser-based versions of this data sheet, refer to the left-hand navigation. 28 Submit Documentation Feedback Copyright © 2006–2015, Texas Instruments Incorporated Product Folder Links: SN65HVD30-EP SN65HVD31-EP SN65HVD32-EP SN65HVD33-EP SN65HVD34-EP SN65HVD35-EP PACKAGE OPTION ADDENDUM www.ti.com 21-Oct-2014 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (°C) Device Marking (4/5) SN65HVD30MDREP ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -55 to 125 HVD30EP SN65HVD30MDREPG4 ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -55 to 125 HVD30EP SN65HVD33MDREP ACTIVE SOIC D 14 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -55 to 125 HVD33EP SN65HVD33MDREPG4 ACTIVE SOIC D 14 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -55 to 125 HVD33EP V62/06634-01XE ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -55 to 125 HVD30EP V62/06634-04YE ACTIVE SOIC D 14 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -55 to 125 HVD33EP (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. Addendum-Page 1 Samples PACKAGE OPTION ADDENDUM www.ti.com 21-Oct-2014 (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. OTHER QUALIFIED VERSIONS OF SN65HVD30-EP, SN65HVD33-EP : • Catalog: SN65HVD30, SN65HVD33 NOTE: Qualified Version Definitions: • Catalog - TI's standard catalog product Addendum-Page 2 PACKAGE MATERIALS INFORMATION www.ti.com 21-Oct-2014 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant SN65HVD30MDREP SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 SN65HVD33MDREP SOIC D 14 2500 330.0 16.4 6.5 9.0 2.1 8.0 16.0 Q1 Pack Materials-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 21-Oct-2014 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN65HVD30MDREP SOIC SN65HVD33MDREP SOIC D 8 2500 367.0 367.0 35.0 D 14 2500 333.2 345.9 28.6 Pack Materials-Page 2 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. 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