DS9639A DS9639A Dual Differential Line Receiver Literature Number: SNOSC38 DS9639A Dual Differential Line Receiver General Description Features The DS9639A is a Schottky dual differential line receiver which has been specifically designed to satisfy the requirements of EIA Standards RS-422, RS-423 and RS-232C. In addition, the DS9639A satisfies the requirements of MIL-STD 188-114 and is compatible with the International Standard CCITT recommendations. The DS9639A is suitable for use as a line receiver in digital data systems, using either single ended or differential, unipolar or bipolar transmission. It requires a single 5.0V power supply and has Schottky TTL compatible outputs. The DS9639A has an operational input common mode range of ± 7.0V either differentially or to ground. n n n n n n n n Dual channel Single 5.0V supply Satisfies EIA Standards RS-422, RS-423 and RS-232C Built-in ± 35 mV hysteresis High input common mode voltage range High input impedance TTL compatible outputs Schottky technology Connection Diagram 8-Lead DIP DS009623-1 Top View Order Number DS9639ACN See NS Package Number N08E © 1998 National Semiconductor Corporation DS009623 www.national.com DS9639A Dual Differential Line Receiver February 1996 Absolute Maximum Ratings (Note 2) Output Sink Current Maximum Power Dissipation (Note 1) at 25˚C Molded Package If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Storage Temperature Range Operating Temperature Range Lead Temperature Molded DIP (soldering, 10 sec.) VCC Lead Potential to Ground Input Potential to Ground Lead Differential Input Voltage Output Differential to Ground Lead 50 mA 930 mW Recommended Operating Conditions −65˚C to +175˚C 0˚C to +70˚C 265˚C −0.5V to +7.0V ± 25V ± 25V −0.5V to 5.5V Supply Voltage (VCC) Operating Temperature (TA) Min 4.75 0 Typ 5.0 25 Max 5.25 70 Units V ˚C Note 1: Derate molded DIP package 7.5mW/˚C above 25˚C. Electrical Characteristics (Notes 3, 4) Over recommended operating temperature and supply voltage ranges, unless otherwise specified Symbol VTH Parameter Differential Input Max Units −7.0V ≤ VCM ≤ +7.0V Conditions (Note 2) −0.2 Min Typ +0.2 V −7.0V ≤ VCM ≤ +7.0V −0.4 +0.4 V mA Threshold Voltage (Note 6) VTH(R) Differential Input Threshold Voltage (Note 7) II Input Current (Note 8) VOL Output Voltage LOW VOH Output Voltage HIGH IOS Output Short Circuit Current (Note 5) ICC Supply Current VHYST Input Hysteresis VI = 10V, 0V ≤ VCC ≤ 5.5V VI = −10V, 0V ≤ VCC ≤ 5.5V IOL = 20 mA, VCC = Min IOH = −1.0 mA, VCC = Min VO = 0V, VCC = Max 1.1 3.25 −1.6 −3.25 0.35 0.5 V 2.5 3.5 −40 −75 −100 mA 35 50 mA VCC = Max, VI+ = 0.5V, VI− = GND VCM = ± 7.0V (See Curves) V 70 mV Switching Characteristics VCC = 5.0V, TA = 25˚C Symbol tPLH Parameter Propagation Delay Time Typ Max Units See AC Test Circuit Conditions Min 55 85 ns See AC Test Circuit 50 75 ns Low to High tPHL Propagation Delay Time High to Low 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 the 0˚C to +70˚C range for the DS9639A. All typicals are given for VCC = 5V and TA = 25˚C. Note 4: All currents into the device pins are positive; all currents out of the device pins are negative. All voltages are referenced to ground unless otherwise specified. Note 5: Only one output at a time should be shorted. Note 6: VDIFF (Differential Input Voltage) = (VI+) − (VI−). VCM (Common Mode Input Voltage) = VI+ or VI−. Note 7: 500Ω ± 1% in series with inputs. Note 8: The input not under test is tied to ground. www.national.com 2 Equivalent Circuit DS009623-2 FIGURE 1. Equivalent Circuit Typical Input/Output Transfer Characteristics DS009623-3 DS009623-4 FIGURE 2. FIGURE 3. 3 www.national.com AC Test Circuit and Switching Time Waveform DS009623-6 VI Amplitude: 1.0V Offset: 0.5V Pulse Width: 500 ns PRR: 1 MHz tr = tf ≤ 5.0 ns DS009623-5 CL includes jig and probe capacitance. All diodes are FD700 or equivalent. FIGURE 4. AC Test Circuit and Waveforms FIGURE 5. Typical Applications DS009623-7 Rt ≥ 50Ω for RS-422 operation. Rt combined with input impedance of receivers must be greater than 90Ω. FIGURE 6. RS-422 System Application (FIPS 1020) Differential Simplex Bus Transmission www.national.com 4 5 DS9639A Dual Differential Line Receiver Physical Dimensions inches (millimeters) unless otherwise noted Molded Dual-In-Line Package (N) Order Number DS9639ACN NS Package Number N08E 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 OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 2. A critical component in any component of a life support 1. Life support devices or systems are devices or sysdevice or system whose failure to perform can be reatems which, (a) are intended for surgical implant into sonably expected to cause the failure of the life support the body, or (b) support or sustain life, and whose faildevice or system, or to affect its safety or effectiveness. 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. 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 National Semiconductor Asia Pacific Customer Response Group Tel: 65-2544466 Fax: 65-2504466 Email: [email protected] National Semiconductor Japan Ltd. Tel: 81-3-5620-6175 Fax: 81-3-5620-6179 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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