DS3695A NSC | Alldatasheet
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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 Connection and Logic Diagram TRI-STATE® is a registered trademark of National Semiconductor Corporation. Molded Package, Small Outline (M) DS005272-1 Top View DS005272-2 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 February 1996 DS3695A/DS3695AT/DS3696A Multipoint RS485/RS422 Transceivers © 1998 National Semiconductor Corporation DS005272 www.national.com
Absolute Maximum Ratings(Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage, V CC 7V Control Input Voltages 7V Driver Input Voltage 7V Driver Output Voltages +15V/−10V Receiver Input Voltages +15V/−10V Receiver Output Voltage 5.5V Continuous Power Dissipation 25˚C M Package 630 mW (Note 4) Storage Temp. Range −65˚C to +150˚C Lead Temp. (Soldering 4 seconds) 260˚C Recommended Operating Conditions Min Max Units Supply Voltage, VCC 4.75 5.25 V Bus Voltage −7 +12 V Operating Free Air Temp. (T Commercial (DS3695AM) 0 +70 ˚C Industrial (DS3695ATM) −40 +85 ˚C Commercial (DS3696AM) 0 +70 ˚C Electrical Characteristics(Notes 2, 3) 0˚C ≤ TA ≤ 70˚C, 4.75V< VCC < 5.25V unless otherwise specified Symbol Parameter Conditions Min Typ Max Units VOD1 Differential Driver Output I O =0 5VVoltage (Unloaded) VOD2 Differential Driver Output R = 50 Ω ; (RS-422) (Note 5) 2 V Voltage (with Load) R = 27 Ω ; (RS-485) 1.5 V ΔVOD Change in Magnitude of Driver Differential Output Voltage For 0.2 V Complementary Output States VOC Driver Common Mode Output Voltage R=2 7 Ω 3.0 V Δ|VOC | Change in Magnitude of Driver Common Mode Output Voltage 0.2 V For Complementary Output States VIH Input High Voltage 2V VIL Input Low Voltage DI, DE, 0.8 V VCL Input Clamp Voltage RE , RE /DE IIN = −18 mA −1.5 V IIL Input Low Current V IL = 0.4V −200 µA IIH Input High Current V IH = 2.4V 20 µA IIN Input Current DO/RI, DO /RI VCC = 0V or 5.25V VIN = 12V +1.0 mA RI, RI DE or RE /DE = 0V VIN = −7V −0.8 mA VTH Differential Input Threshold −7V ≤ VCM ≤ +12V −0.2 +0.2 V Voltage for Receiver ΔVTH Receiver Input Hysteresis V CM =0 V 7 0 m V VOH Receiver Output High Voltage I OH = −400 µA 2.4 V VOL Output Low Voltage RO I OL = 16 mA (Note 5) 0.5 V TS IOL = 8 mA 0.45 V IOZR OFF-State (High Impedance) V CC = Max ±20 µAOutput Current at Receiver 0.4V ≤ VO ≤ 2.4V R IN Receiver Input Resistance −7V ≤ VCM ≤ +12V 12 k Ω ICC Supply Current No Load Driver Outputs Enabled 42 60 mA (Note 5) Driver Outputs Disabled 27 40 mA IOSD Driver Short-Circuit V O = −7V (Note 5) −250 mA Output Current V O = +12V (Note 5) +250 mA IOSR Receiver Short-Circuit V O = 0V −15 −85 mA 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 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 = 25˚C. Note 4:Derate linearly at 6.5 mW/˚C to 337 mW at 70˚C. FIGURE 1. Receiver Propagation Delay Test Circuit
10 X Z H
- TS is an “open collector” output with an on-chip 10 kΩ pull-up resistor.
FIGURE 6. Driver Enable/Disable Propagation Delay Timing FIGURE 7. Driver Differential Transition Timing
Repeater control logic not shown. See AN-702. www.national.com 6
Physical Dimensionsinches (millimeters) unless otherwise noted LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DE- VICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMI- CONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or sys- tems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose fail- ure 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 in any component of a life support device or system whose failure to perform can be rea- sonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. National Semiconductor Corporation Americas Tel: 1-800-272-9959 Fax: 1-800-737-7018 Email: support@nsc.com www.national.com National Semiconductor Europe Fax: +49 (0) 1 80-530 85 86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 1 80-530 85 85 English Tel: +49 (0) 1 80-532 78 32 Français Tel: +49 (0) 1 80-532 93 58 Italiano Tel: +49 (0) 1 80-534 16 80 National Semiconductor Asia Pacific Customer Response Group Tel: 65-2544466 Fax: 65-2504466 Email: sea.support@nsc.com National Semiconductor Japan Ltd. Tel: 81-3-5620-6175 Fax: 81-3-5620-6179 Molded SOIC Package (M) Order Number DS3695AM, DS3695ATM or DS3696AM DS3695A/DS3695AT/DS3696A Multipoint RS485/RS422 Transceivers 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.