DS3695A,DS3695AT,DS3696A DS3695A/DS3695AT/DS3696A Multipoint RS485/RS422 Transceivers Literature Number: SNLS353B DS3695A/DS3695AT/DS3696A Multipoint RS485/RS422 Transceivers General Description Features The DS3695A and DS3696A are high speed differential TRI-STATE (R) bus/line transceivers designed to meet the requirements of EIA standard RS485 with extended common mode range (+12V to -7V), for multipoint data transmission. In addition they are compatible with requirements of RS-422. The driver and receiver outputs feature TRI-STATE capability. The driver outputs remain in TRI-STATE over the entire common mode range of +12V to -7V. Bus faults that cause excessive power dissipation within the device trigger a thermal shutdown circuit, which forces the driver outputs into the high impedance state. The DS3696A provides an output pin (TS) which reports the thermal shutdown of the device. TS is an "open collector" pin with an internal 10 k pull-up resistor. This allows the TS outputs of several devices to be wire OR-ed. n Meets EIA standard RS485 for multipoint bus transmission and is compatible with RS-422 n 10 ns driver propagation delays (typical) n Single +5V supply n -7V to +12V bus common mode range permits 7V ground difference between devices on the bus n Thermal shutdown protection n High impedance to bus with driver in TRI-STATE or with power off, over the entire common mode range allows the unused devices on the bus to be powered down n Combined impedance of a driver output and receiver input is less than one RS485 unit load, allowing up to 32 transceivers on the bus n 70 mV typical receiver hysteresis n Available in SOIC packaging Both AC and DC specifications are guaranteed over the 0C to 70C temperature and 4.75V to 5.25V supply voltage range. Connection and Logic Diagram Molded Package, Small Outline (M) 00527201 Top View 00527202 TS was LF (Line Fault) on previous datasheets, TS goes low upon thermal shutdown. Top View Order Number DS3695AM, DS3695ATM or DS3696AM See NS Package Number M08A TRI-STATE (R) is a registered trademark of National Semiconductor Corporation. (c) 2004 National Semiconductor Corporation DS005272 www.national.com DS3695A/DS3695AT/DS3696A Multipoint RS485/RS422 Transceivers February 1996 DS3695A/DS3695AT/DS3696A Absolute Maximum Ratings (Note 1) Storage Temp. Range If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Lead Temp. (Soldering 4 seconds) Control Input Voltages 7V Driver Input Voltage 7V Driver Output Voltages +15V/-10V Supply Voltage, VCC Receiver Input Voltages +15V/-10V Bus Voltage Receiver Output Voltage 5.5V Min Max Units 4.75 5.25 V -7 +12 V Operating Free Air Temp. (TA) Commercial (DS3695AM) Continuous Power Dissipation @ 25C M Package 260C Recommended Operating Conditions 7V Supply Voltage, VCC -65C to +150C Industrial (DS3695ATM) 0 +70 C -40 +85 C 0 +70 C Commercial (DS3696AM) 630 mW (Note 4) Electrical Characteristics (Notes 2, 3) 0C TA 70C, 4.75V < VCC < 5.25V unless otherwise specified Symbol VOD1 Parameter Conditions Differential Driver Output Min Typ IO = 0 Voltage (Unloaded) VOD2 VOD Differential Driver Output R = 50; (RS-422) (Note 5) Voltage (with Load) R = 27; (RS-485) Max Units 5 V 2 V 1.5 V Change in Magnitude of Driver Differential Output Voltage For 0.2 V 3.0 V 0.2 V 0.8 V Complementary Output States VOC Driver Common Mode Output Voltage |VOC| Change in Magnitude of Driver R = 27 Common Mode Output Voltage For Complementary Output States VIH Input High Voltage VIL Input Low Voltage VCL Input Clamp Voltage IIL Input Low Current IIH Input High Current IIN Input Current 2 RE , RE /DE Differential Input Threshold IIN = -18 mA -1.5 V VIL = 0.4V -200 A VIH = 2.4V 20 A VIN = 12V +1.0 mA DE or RE /DE = 0V VIN = -7V -0.8 mA DO/RI, DO /RI VCC = 0V or 5.25V RI, RI VTH V DI, DE, -7V VCM +12V -0.2 Voltage for Receiver +0.2 V VTH Receiver Input Hysteresis VCM = 0V VOH Receiver Output High Voltage IOH = -400 A VOL Output Low Voltage RO IOL = 16 mA (Note 5) 0.5 V TS IOL = 8 mA 0.45 V 20 A IOZR 70 mV 2.4 V OFF-State (High Impedance) VCC = Max Output Current at Receiver 0.4V VO 2.4V RIN Receiver Input Resistance -7V VCM +12V ICC Supply Current No Load Driver Outputs Enabled 42 60 mA (Note 5) Driver Outputs Disabled 27 40 mA IOSD IOSR 12 k Driver Short-Circuit VO = -7V (Note 5) -250 mA Output Current VO = +12V (Note 5) +250 mA Receiver Short-Circuit VO = 0V -85 mA -15 Output Current Note 1: "Absolute maximum ratings" are those beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the device should be operated at these limits. The tables of "Electrical Characteristics" provide conditions for actual device operation. www.national.com 2 Note 4: Derate linearly at 6.5 mW/C to 337 mW at 70C. Note 5: All limits for which Note 5 is applied must be derated by 10% for DS3695AT. Other parameters remain the same for this extended temperature range device (-40C TA +85C). Switching Characteristics 0C TA 70C, 4.75V < VCC < 5.25V unless otherwise specified (Note 3) Receiver Switching Characteristics (Figures 1, 2 and Figure 3) Min Typ Max tPLH Symbol CL = 15 pF Conditions 15 28 42 Units ns tPHL S1 and S2 15 28 42 ns |tPLH-tPHL| Closed 0 3 tPLZ CL = 15 pF, S2 Open 5 29 35 ns tPHZ CL = 15 pF, S1 Open 5 12 16 ns tPZL CL = 15 pF, S2 Open 7 15 28 ns tPZH CL = 15 pF, S1 Open 7 15 20 ns Min Typ Max Units ns Driver Switching Characteristics Symbol Conditions SINGLE ENDED CHARACTERISTICS (Figures 4, 5 and Figure 7) tPLH RLDIFF = 60 9 15 22 ns tPHL CL1 = CL2 = 100 pF 9 15 22 ns 0 2 8 ns tPLZ CL = 15 pF, S2 Open 7 15 30 ns tPHZ CL = 15 pF, S1 Open 7 15 30 ns tPZL CL = 100 pF, S2 Open 30 35 50 ns tPZH CL = 100 pF, S1 Open 30 35 50 ns 6 10 18 ns tSKEW|tPLH-tPHL| DIFFERENTIAL SWITCHING CHARACTERISTICS (Figure 7) tr, tf RLDIFF = 60 CL1 = CL2 = 100 pF AC Test Circuits and Switching Waveforms 00527206 FIGURE 1. Receiver Propagation Delay Test Circuit 3 www.national.com DS3695A/DS3695AT/DS3696A Note 2: All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to device ground unless otherwise specified. Note 3: All typicals are given for VCC = 5V and TA = 25C. DS3695A/DS3695AT/DS3696A AC Test Circuits and Switching Waveforms (Continued) 00527207 Differential input voltage may be realized by grounding RI and pulsing RI between +2.5V and -2.5V FIGURE 2. Receiver Input-to-Output Propagation Delay Timing 00527208 FIGURE 3. Receiver Enable/Disable Propagation Delay Timing 00527209 Unless otherwise specified the switches are closed. 00527210 FIGURE 4. Driver Propagation Delay Test Circuits www.national.com 4 DS3695A/DS3695AT/DS3696A AC Test Circuits and Switching Waveforms (Continued) 00527211 tPLH and tPHL are measured to the respective 50% points. tSKEW is the difference between propagation delays of the complementary outputs. FIGURE 5. Driver Input-to-Output Propagation Delay Timing (Single-Ended) 00527212 FIGURE 6. Driver Enable/Disable Propagation Delay Timing 00527213 FIGURE 7. Driver Differential Transition Timing 5 www.national.com DS3695A/DS3695AT/DS3696A Function Tables DS3695A/DS3696A Transmitting Inputs Line Outputs RE DE DI Condition DO DO TS * (DS3696A Only) X 1 1 No Fault 0 1 H X 1 0 No Fault 1 0 H X 0 X X Z Z H X 1 X Fault Z Z L DS3695A/DS3696A Receiving Inputs Output RE DE RI-RI RO TS * (DS3696A Only) 0 0 +0.2V 1 H 0 0 -0.2V 0 H 0 0 Inputs Open** 1 H 1 0 X Z H X -- Don't care condition Z -- High impedance state Fault -- Improper line conditions causing excessive power dissipation in the driver, such as shorts or bus contention situations * TS is an "open collector" output with an on-chip 10 k pull-up resistor. ** This is a fail safe condition Typical Application 00527218 Repeater control logic not shown. See AN-702. www.national.com 6 inches (millimeters) unless otherwise noted Molded SOIC Package (M) Order Number DS3695AM, DS3695ATM or DS3696AM NS Package Number M08A National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. For the most current product information visit us at www.national.com. LIFE SUPPORT POLICY NATIONAL'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ``Banned Substances'' as defined in CSP-9-111S2. National Semiconductor Americas Customer Support Center Email: new.feedback@nsc.com Tel: 1-800-272-9959 www.national.com National Semiconductor Europe Customer Support Center Fax: +49 (0) 180-530 85 86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 69 9508 6208 English Tel: +44 (0) 870 24 0 2171 Francais Tel: +33 (0) 1 41 91 8790 National Semiconductor Asia Pacific Customer Support Center Email: ap.support@nsc.com National Semiconductor Japan Customer Support Center Fax: 81-3-5639-7507 Email: jpn.feedback@nsc.com Tel: 81-3-5639-7560 DS3695A/DS3695AT/DS3696A Multipoint RS485/RS422 Transceivers Physical Dimensions IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI's terms and conditions of sale supplied at the time of order acknowledgment. TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI's standard warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where mandated by government requirements, testing of all parameters of each product is not necessarily performed. TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products and applications using TI components. To minimize the risks associated with customer products and applications, customers should provide adequate design and operating safeguards. TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right, copyright, mask work right, or other TI intellectual property right relating to any combination, machine, or process in which TI products or services are used. Information published by TI regarding third-party products or services does not constitute a license from TI to use such products or services or a warranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual property of the third party, or a license from TI under the patents or other intellectual property of TI. Reproduction of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for such altered documentation. Information of third parties may be subject to additional restrictions. Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all express and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice. TI is not responsible or liable for any such statements. TI products are not authorized for use in safety-critical applications (such as life support) where a failure of the TI product would reasonably be expected to cause severe personal injury or death, unless officers of the parties have executed an agreement specifically governing such use. Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of TI products in such safety-critical applications, notwithstanding any applications-related information or support that may be provided by TI. Further, Buyers must fully indemnify TI and its representatives against any damages arising out of the use of TI products in such safety-critical applications. TI products are neither designed nor intended for use in military/aerospace applications or environments unless the TI products are specifically designated by TI as military-grade or "enhanced plastic." Only products designated by TI as military-grade meet military specifications. Buyers acknowledge and agree that any such use of TI products which TI has not designated as military-grade is solely at the Buyer's risk, and that they are solely responsible for compliance with all legal and regulatory requirements in connection with such use. TI products are neither designed nor intended for use in automotive applications or environments unless the specific TI products are designated by TI as compliant with ISO/TS 16949 requirements. Buyers acknowledge and agree that, if they use any non-designated products in automotive applications, TI will not be responsible for any failure to meet such requirements. Following are URLs where you can obtain information on other Texas Instruments products and application solutions: Products Applications Audio www.ti.com/audio Communications and Telecom www.ti.com/communications Amplifiers amplifier.ti.com Computers and Peripherals www.ti.com/computers Data Converters dataconverter.ti.com Consumer Electronics www.ti.com/consumer-apps DLP(R) Products www.dlp.com Energy and Lighting www.ti.com/energy DSP dsp.ti.com Industrial www.ti.com/industrial Clocks and Timers www.ti.com/clocks Medical www.ti.com/medical Interface interface.ti.com Security www.ti.com/security Logic logic.ti.com Space, Avionics and Defense www.ti.com/space-avionics-defense Power Mgmt power.ti.com Transportation and Automotive www.ti.com/automotive Microcontrollers microcontroller.ti.com Video and Imaging RFID www.ti-rfid.com OMAP Mobile Processors www.ti.com/omap Wireless Connectivity www.ti.com/wirelessconnectivity TI E2E Community Home Page www.ti.com/video e2e.ti.com Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright (c) 2011, Texas Instruments Incorporated