DS75176B NSC | Alldatasheet

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n Meets EIA standard RS485 for multipoint bus transmission and is compatible with RS-422. n Small Outline (SO) Package option available for minimum board space. n 22 ns driver propagation delays. 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 Pin out compatible with DS3695/A and SN75176A/B. 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. Connection and Logic Diagram 00875901 Top View Order Number DS75176BN, DS75176BTN, DS75176BM or DS75176BTM See NS Package Number N08E or M08A TRI-STATE® is a registered trademark of National Semiconductor Corp. July 2004 DS75176B/DS75176BT Multipoint RS-485/RS-422 Transceivers © 2004 National Semiconductor Corporation DS008759 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 (DS75176B) +15V/ −10V Receiver Output Voltage 5.5V Continuous Power Dissipation 25˚C for M Package 675 mW (Note 5) for N Package 900 mW (Note 4) Storage Temperature Range −65˚C to +150˚C Lead Temperature (Soldering, 4 seconds) 260˚C ESD Rating (HBM) 500V Recommended Operating Conditions Min Max Units Supply Voltage, VCC 4.75 5.25 V Voltage at Any Bus Terminal −7 +12 V (Separate or Common Mode) Operating Free Air Temperature T A DS75176B 0 +70 ˚C DS75176BT −40 +85 ˚C Differential Input Voltage, VID (Note 6) −12 +12 V 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 5 V Voltage (Unloaded) VOD2 Differential Driver Output ( Figure 1) R=5 0 Ω; (RS-422) (Note 7) 2 V Voltage (with Load) R = 27 Ω; (RS-485) 1.5 V ∆VOD Change in Magnitude of Driver Differential Output Voltage For 0.2 V Complementary Output States VOC Driver Common Mode Output ( Figure 1) R=2 7 Ω 3.0 V Voltage ∆|VOC| Change in Magnitude of Driver Common Mode Output Voltage 0.2 V For Complementary Output States V IH Input High Voltage 2V VIL Input Low Voltage DI, DE, 0.8 VCL Input Clamp Voltage RE , E IIN = −18 mA −1.5 IIL Input Low Current V IL = 0.4V −200 µA IIH Input High Current V IH = 2.4V 20 µA IIN Input DO/RI, DO/RI VCC = 0V or 5.25V V IN = 12V +1.0 mA Current DE = 0V V IN = −7V −0.8 mA VTH Differential Input Threshold −7V ≤ VCM ≤ + 12V −0.2 +0.2 V Voltage for Receiver ∆VTH Receiver Input Hysteresis V CM =0 V 7 0 m V VOH Receiver Output High Voltage I OH = −400 µA 2.7 V VOL Output Low Voltage RO I OL = 16 mA (Note 7) 0.5 V IOZR OFF-State (High Impedance) V CC = Max ±20 µA Output Current at Receiver 0.4V ≤ VO ≤ 2.4V RIN Receiver Input Resistance −7V ≤ VCM ≤ +12V 12 k Ω ICC Supply Current No Load Driver Outputs Enabled 55 mA (Note 7) Driver Outputs Disabled 35 mA DS75176B/DS75176BT www.national.com 2

Electrical Characteristics(Notes 2, 3) (Continued) 0˚C ≤ TA≤ 70˚C, 4.75V < VCC< 5.25V unless otherwise specified Symbol Parameter Conditions Min Typ Max Units IOSD Driver Short-Circuit V O = −7V (Note 7) −250 mA Output Current V O = +12V (Note 7) +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. 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 V CC = 5V and T A = 25˚C. Note 4: Derate linearly at 5.56 mW/˚C to 650 mW at 70˚C. Note 5: Derate linearly @ 6.11 mW/˚C to 400 mW at 70˚C. Note 6: Differential - Input/Output bus voltage is measured at the noninverting terminal A with respect to the inverting terminal B. Note 7: All worst case parameters for which note 7 is applied, must be increased by 10% for DS75176BT. The other parameters remain valid for −40˚C < TA < +85˚C. Switching Characteristics VCC = 5.0V, TA = 25˚C Symbol Parameter Conditions Min Typ Max Units tPLH Driver Input to Output R LDIFF =6 0Ω 12 22 ns tPHL Driver Input to Output C L1 =C L2 = 100 pF 17 22 ns tr Driver Rise Time R LDIFF =6 0Ω 18 ns tf Driver Fall Time C L1 =CL2 = 100 pF 18 ns (Figure 3and Figure 5) tZH Driver Enable to Output High C L = 100 pF ( Figure 4and Figure 6)S 1 Open 29 100 ns tZL Driver Enable to Output Low C L = 100 pF ( Figure 4and Figure 6)S 2 Open 31 60 ns tLZ Driver Disable Time from Low C L =1 5p F( Figure 4and Figure 6)S 2 Open 13 30 ns tHZ Driver Disable Time from High C L =1 5p F( Figure 4and Figure 6)S 1 Open 19 200 ns tPLH Receiver Input to Output C L =1 5p F( Figure 2and Figure 7)3 0 3 7 n s tPHL Receiver Input to Output S1 and S2 Closed 32 37 ns tZL Receiver Enable to Output Low C L =1 5p F( Figure 2and Figure 8)S 2 Open 15 20 ns tZH Receiver Enable to Output High C L =1 5p F( Figure 2and Figure 8)S 1 Open 11 20 ns tLZ Receiver Disable from Low C L =1 5p F( Figure 2and Figure 8)S 2 Open 28 32 ns tHZ Receiver Disable from High C L =1 5p F( Figure 2and Figure 8)S 1 Open 13 35 ns DS75176B/DS75176BT www.national.com3

00 ≥ +0.2V 1 00 ≤ −0.2V 0 0 0 Inputs Open** 1

10 X Z

X — Don’t care condition Z — High impedance state Fault — Improper line conditons causing excessive power dissipation in the driver, such as shorts or bus contention situations **This is a fail safe condition Typical Application 00875911 DS75176B/DS75176BT www.national.com 6

Physical Dimensions inches (millimeters) unless otherwise noted Lit. # 103669 Molded Dual-In-Line Package (N) Order Number DS75176BN or DS75176BTN DS75176B/DS75176BT www.national.com7

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 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 Français 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 www.national.com DS75176B/DS75176BT Multipoint RS-485/RS-422 Transceivers National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the righ t at any time without notice to change said circuitry and specifications.