DS3487 DS3487 Quad TRI-STATE Line Driver Literature Number: SNLS355B DS3487 Quad TRI-STATE (R) Line Driver General Description Features National's quad RS-422 driver features four independent drivers which comply with EIA Standards for the electrical characteristics of balanced voltage digital interface circuits. The outputs are TRI-STATE structures which are forced to a high impedance state when the appropriate output control pin reaches a logic zero condition. All input pins are PNP buffered to minimize input loading for either logic one or logic zero inputs. n n n n n n n Four independent drivers TRI-STATE (R) outputs Fast propagation times (typ 10 ns) TTL compatible 5V supply Output rise and fall times less than 15 ns Pin compatible with DS8924 and MC3487 Block and Connection Diagrams Dual-In-Line Package 00578001 00578002 Top View Order Number DS3487M or DS3487N See NS Package Number M16A or N16E Truth Table Input Control Non-Inverting Inverting Input Output Output H H H L L H L H X L Z Z L = Low logic state H = High logic state X = Irrelevant Z = TRI-STATE(high impedance) TRI-STATE (R) is a registered trademark of National Semiconductor Corporation. (c) 2004 National Semiconductor Corporation DS005780 www.national.com DS3487 Quad TRI-STATE Line Driver May 1998 DS3487 Absolute Maximum Ratings (Note 2) (Soldering, 4 seconds) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Operating Conditions 8V Input Voltage DS3487 -65C to +150C DS3487 1476 mW SO Package Max Units 4.75 5.25 V 0 +70 C Temperature (TA) Maximum Power Dissipation (Note 1) at 25C Molded DIP Package Min Supply Voltage, VCC 5.5V Storage Temperature 260C 1051 mW Note 1: Derate DIP molded package 11.9 mW/C above 25C. Derate SO package 8.41 mW/C above 25C. Lead Temperature Electrical Characteristics (Notes 3, 4, 5, 6) Symbol Parameter VIL Input Low Voltage VIH Input High Voltage IIL Input Low Current IIH Input High Current Conditions V IL CL = -18 mA VOL Output Low Voltage I OL = 48 mA VOH Output High Voltage I OH = -20 mA IOS Output Short-Circuit Current IOZ Output Leakage Current (TRI-STATE) IOFF Output Leakage Current Power OFF A VIH = 2.7V 50 A VIH = 5.5V 100 A -1.5 V 0.5 V -140 mA VO = 0.5V -100 A VO = 5.5V 100 A VO = 6V 100 A VO = -0.25V -100 A 0.4 V 2.5 V Difference in Output Offset Voltage Differential Output Voltage |VT|- V T| Difference in Differential Output Voltage ICC Power Supply Current V -200 -40 VCC = 0V Units V = 0.5V I VT Max 2.0 Input Clamp Voltage OS| Typ 0.8 VCL |VOS- V Min 2.0 V 0.4 V Active 50 80 mA TRI-STATE (R) 35 60 mA Switching Characteristics VCC = 5V, TA = 25C Typ Max Units tPHL Symbol Input to Output Parameter Conditions Min 10 15 ns tPLH Input to Output 10 15 ns tTHL Differential Fall Time 10 15 ns tTLH Differential Rise Time 10 15 ns tPHZ Enable to Output RL = 200, CL = 50 pF 17 25 ns tPLZ Enable to Output RL = 200, CL = 50 pF 15 25 ns tPZH Enable to Output RL = , CL = 50 pF, S1 Open 11 25 ns tPZL Enable to Output RL = 200, CL = 50 pF, S2 Open 15 25 ns Note 2: "Absolute Maximum Ratings" are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the devices should be operated at these limits. The table of "Electrical Characteristics" provides conditions for actual device operation. Note 3: Unless otherwise specified min/max limits apply across the 0C to +70C range for the DS3487. All typicals are given for VCC = 5V and TA = 25C. Note 4: All currents into device pins are positive, all currents out of device pins as negative. All voltages are referenced to ground unless otherwise specified. Note 5: Only one output at a time should be shorted. Note 6: Symbols and definitions correspond to EIA RS-422, where applicable. www.national.com 2 DS3487 AC Test Circuits and Switching Time Waveforms 00578003 00578004 Input pulse: f = MHz, 50%; tr = tf 15 ns. FIGURE 1. Propagation Delays 00578005 S1 and S2 closed except as noted. CL includes probe and jig capacitance. 00578006 Input pulse: f = MHz, 50%; tr = tf 15 ns. S1 = open for tPZH S2 = open for tPZL FIGURE 2. TRI-STATE Enable and Disable Delays 3 www.national.com DS3487 AC Test Circuits and Switching Time Waveforms (Continued) 00578007 00578008 Input pulse: f = MHz, 50%; tr = tf 15 ns. FIGURE 3. Differential Rise and Fall Times www.national.com 4 DS3487 Physical Dimensions inches (millimeters) unless otherwise noted Small Outline Package (M) Order Number DS3487M NS Package Number M16A Molded Dual-In-Line Package (N) Order Number DS3487N NS Package Number N16E 5 www.national.com DS3487 Quad TRI-STATE Line Driver Notes 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 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. 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