DS75110A Dual Line Drivers General Description Features The DS75110A is a dual line driver with independent channels, common supply and ground terminals featuring constant current outputs. These drivers are designed for optimum performance when used with the DS75107, DS75108 line receivers. The output current of the DS75110A is nominally 12 mA and may be switched to either of two output terminals with the appropriate logic levels at the driver input. n Improved stability over supply voltage and temperature ranges n Constant current, high impedance outputs n High speed: 15 ns max propagation delay n Standard supply voltages n Inhibitor available for driver selection n High common mode output voltage range (−3.0V to 10V) n TTL input compatibility Separate or common control inputs are provided for increased logic versatility. These control or inhibit inputs allow the output current to be switched off (inhibited) by applying low logic levels to the control inputs. The output current in the inhibit mode, IO(Off), is specified so that minimum line loading is induced. This is highly desirable in system applications using party line data communications. Connection Diagram Function Table Inputs 14–Lead Dual-In-Line Package and SO-14 Package Outputs Logic Inhibitor 1 2 A/B INH A1/B1 A2/B2 X X L X Off Off X X X L Off Off L X H H Off On X L H H Off On H H H H On Off H = High L = Low X = Don’t Care DS009619-1 Top View Order Number DS75110AM or DS75110AN See NS Package Number M14A or N14A © 1999 National Semiconductor Corporation DS009619 www.national.com DS75110A Dual Line Drivers January 1996 Absolute Maximum Ratings (Note 2) Molded DIP and SO-14 (Soldering, 10 sec.) 265˚C Maximum Power Dissipation (Note 1) at 25˚C Molded Package 1040 mW SO Package 930 mW ± 7.0V Suppy Voltage Input Voltage (Any Input) 5.5V Output Voltage (Any Output) −5.0V to +12V If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Storage Temperature Range Ceramic DIP Molded DIP and SO-14 Lead Temperature Ceramic DIP (Soldering, 60 sec.) −65˚C to +175˚C −65˚C to +150˚C 300˚C Recommended Operating Conditions DS75110A Min Typ Units Max Positive Supply Voltage (V+) 4.75 5.0 5.25 V Negative Supply Voltage (V−) −4.75 −5.0 −5.25 V V Positive Common Mode Voltage (VCM+) 0 10 Negative Common Mode Voltage (VCM−) 0 −3.0 V Operating Temperature (TA) 0 70 ˚C 25 Note 1: Derate molded DIP package 8.3 mW/˚C above 25˚C, derate SO package 7.5 mW/˚C above 25˚C. Electrical Characteristics (Notes 3, 4) Over recommended operating temperature range, unless otherwise specified. Symbol Parameter VIH Input Voltage HIGH VIL Input Voltage LOW VIC Input Clamp Voltage IO(On) IO(Off) Conditions Min Typ Max 2.0 V 0.8 V −0.9 −1.5 V 12 15 mA µA Output Current VCC = Min, II = −12 mA VCC = Max, VO = 10V VCC = Min, VO = −3.0V Off-State Output Current VCC = Min, VO = 10V 100 VCC = Max, VI = 5.5V 1.0 On-State 6.5 Units 12 (Inhibited Only) II IIH Input Current A, B or C At Maximum Inputs Input Voltage D Input Input Current HIGH A, B or C mA 2.0 VCC = Max, VI = 2.4V 40 Input µA D Input IIL Input Current LOW A, B or C 80 VCC = Max, VI = 0.4V −3.0 Input mA D Input I+(On) I−(On) −6.0 Positive Supply Current VCC = Max, with Driver Enabled A & B Inputs at 0.4V, Negative Supply Current 23 35 mA C & D Inputs at 2.0V −34 −50 mA 21 mA −17 mA with Driver Enabled I+(Off) I−(Off) Positive Supply Current VCC = Max, with Driver Inhibited A, B, C & D Inputs Negative Supply Current at 0.4V with Driver Inhibited 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 tables of “Electrical Characteristics” provide conditions for actual device operation. Note 3: Unless otherwise specified min/max limits apply across 0˚C to +70˚C range for the DS75110. All typicals are given for VCC = 5V and TA = 25˚C. Note 4: When using only one channel of the line drivers, the other channel should be inhibited and/or its outputs grounded. www.national.com 2 Switching Characteristics VCC = ± 5V, TA = 25˚C Symbol Parameter Conditions From To (Input) (Output) 1 or 2 tPLH Propagation Delay Time, LOW to HIGH Propagation Delay Time, HIGH to LOW CL = 40 pF, RL = 50Ω A or B tPHL tPLH Propagation Delay Time, LOW to HIGH See Test Circuit C or D tPHL Propagation Delay Time, HIGH to LOW 1 or 2 Min Typ Max Units 9.0 15 ns 9.0 15 ns 16 25 ns 13 25 ns DS009619-3 The pulse generators have the following characteristics: tr = tf = 10 ns ± 5.0 ns, tw1 = 500 ns, PRR = 1.0 MHz, tW2 = 1.0 µs, PRR = 500 kHz, ZO = 50Ω. CL includes probe and jib capacitance. For simplicity, only one channel and the inhibitor connections are shown. FIGURE 1. AC Test Circuit DS009619-4 FIGURE 2. AC Waveforms 3 www.national.com Equivalent Circuit DS009619-2 FIGURE 3. Equivalent Circuit www.national.com 4 Typical Applications DS009619-5 FIGURE 4. Simplex Operation DS009619-6 All drivers are DS75110A. Receivers are DS75107 or DS75108. Twisted-pair or coaxial transmission line should be used for minimum noise and cross talk. When only one driver in a package is being used, the outputs of the other driver should either be grounded or inhibited to reduce power dissipation. FIGURE 5. Half-Duplex Operation 5 www.national.com Physical Dimensions inches (millimeters) unless otherwise noted Molded Surface Mount Package (M) Order Number DS75110AM NS Package Number M14A Molded Dual-In-Line Package (N) Order Number DS75110AN NS Package Number N14A www.national.com 6 DS75110A Dual Line Drivers 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. National Semiconductor Corporation Americas Tel: 1-800-272-9959 Fax: 1-800-737-7018 Email: [email protected] www.national.com National Semiconductor Europe Fax: +49 (0) 1 80-530 85 86 Email: [email protected] 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 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. National Semiconductor Asia Pacific Customer Response Group Tel: 65-2544466 Fax: 65-2504466 Email: [email protected] National Semiconductor Japan Ltd. Tel: 81-3-5639-7560 Fax: 81-3-5639-7507 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.