DS96176 NSC | Alldatasheet

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n Bidirectional transceiver n Meets EIA Standard RS-422A and RS-485 n Designed for multipoint transmission n TRI-STATE driver and receiver enables n Individual driver and receiver enables n Wide positive and negative input/output bus voltage ranges n Driver output capability±60 mA Maximum n Thermal shutdown protection n Driver positive and Negative current-limiting n High impedance receiver input n Receiver input sensitivity of±200 mV n Receiver input hysteresis of 50 mV typical n Operates from single 5.0V supply n Low power requirements Connection Diagram Function Table Driver Input Enable Outputs DI DE A B HH H L LH L H XL Z Z Receiver Differential Inputs Enable Output A-B RE R VID ≥ 0.2V L H VID ≤ −0.2V L L XH Z H = High Level L = Low Level X = Immaterial Z = High Impedance (off) TRI-STATE® is a registered trademark of National Semiconductor Corporation. 8–Lead DIP DS009630-1 Top View Order Number DS96176CN See NS Package Number N08E May 1998 DS96176 RS-485/RS-422 Differential Bus Transceiver © 1998 National Semiconductor Corporation DS009630 www.national.com

Absolute Maximum Ratings(Note 2) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Storage Temperature Range Molded DIP −65˚C to +150˚C Lead Temperature Molded DIP (soldering, 10 sec.) 265˚C Maximum Power Dissipation (Note 1) at 25˚C Molded Package 930 mW Supply Voltage 7.0V Differential Input Voltage +15V/−10V Enable Input Voltage 5.5V Recommended Operating Conditions Min Typ Max Units Supply Voltage (VCC ) 4.75 5.0 5.25 V Voltage at Any Bus Terminal (Separately or Common Mode) −7.0 12 V Differential Input Voltage (VID) ±12 V Output Current HIGH (IOH ) Driver −60 mA Receiver −400 µA Output Current LOW (I OL ) Driver 60 mA Receiver 16 mA Operating Temperature (T A) 0 25 70 ˚C Note 1:Derate molded DIP package 7.5 mW/˚C above 25˚C. Electrical Characteristics(Notes 3, 4) Over recommended temperature, common mode input voltage, and supply voltage ranges, unless otherwise specified Symbol Parameter Conditions Min Typ Max Units DRIVER SECTION V IH Input Voltage HIGH 2.0 V VIL Input Voltage LOW 0.8 V VOH Output Voltage HIGH I OH = −20 mA 3.1 V VOL Output Voltage LOW I OL = 20 mA 0.85 V VIC Input Clamp Voltage I I = −18 mA −1.5 V |VOD1 | Differential Output Voltage I O = 0 mA 6.0 V |VOD2 | Differential Output Voltage R L = 100Ω ,Figure 1 2.0 2.25 V R L = 54Ω ,Figure 1and Figure 2 1.5 2.0 Δ|VOD2 | Change in Magnitude of R L = 54Ω Differential Output Voltage (Note 5) VCM = 0V Figure 1and Figure 2 ±0.2 V R L = 100Ω Figure 1 VOC Common Mode Output Voltage (Note 6) RL = 54Ω or 100Ω ,Figure 1 3.0 V Δ|VOC | Change in Magnitude of ±0.2 V Common Mode Output Voltage (Note 5) IO Output Current (Note 5) Output Disabled V O = 12V 1.0 mA (Includes Receiver II)V O = −7.0V −0.8 IIH Input Current HIGH V I = 2.4V 20 µA IIL Input Current LOW V I = 0.4V −100 µA IOS Short Circuit Output Current V O = −7.0V −250 (Note 10) V O = 0V −150 mA VO = VCC 150 VO = 12V 250 ICC Supply Current No Load Outputs Enabled 35 mA Outputs Disabled 40 RECEIVER SECTION V TH Differential Input High V O = 2.7V, IO = −0.4 mA 0.2 V Threshold Voltage VTL Differential Input Low V O = 0.5V, IO = 8.0 mA −0.2 V Threshold Voltage (Note 7) VT+ −V T− Hysteresis (Note 8) V CM = 0V 50 mV VIH Enable Input Voltage HIGH 2.0 V VIL Enable Input Voltage LOW 0.8 V VIC Enable Input Clamp Voltage I I = −18 mA −1.5 V www.national.com 2

Typical Performance Characteristics Driver Differential Propagation Delay vs VCC vs Temperature DS009630-22 Driver Differential Propagation Delay vs V CC vs Temperature DS009630-23 Driver Differential Rise Time vs V CC vs Temperature DS009630-24 Driver Differential Fall Time vs V CC vs Temperature DS009630-25 Driver Skew vs VCC vs Temperature (|tPLDH –tPHLD |) DS009630-26 www.national.com7

FIGURE 15. Typical Curve Receiver Propagation Delay Timing

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 Dual-In-Line Package (N) Order Number DS96176CN DS96176 RS-485/RS-422 Differential Bus Transceiver 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.