DS9637A Dual Differential Line Receiver General Description Features The DS9637A is a Schottky dual differential line receiver which has been specifically designed to satisfy the requirements of EIA Standards RS-422 and RS-423. In addition, the DS9637A satisfies the requirements of MIL-STD 188-114 and is compatible with the International Standard CCITT recommendations. The DS9637A 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 5V power supply and has Schottky TTL compatible outputs. The DS9637A has an operational input common mode range of ± 7V either differentially or to ground. n n n n n n n n n Dual channel Single 5V supply Satisfies EIA standards RS-422 and RS423 Built-in ± 35 mV hysteresis High input common mode voltage range High input impedance TTL compatible outputs Schottky technology Extended temperature range Connection Diagram 8–Lead DIP and SO-8 Package DS009621-1 Top View Order Number DS9637ACM or DS9637ACN See NS Package Number M08A or N08E For Complete Military Product Specifications, refer to the appropriate SMD or MDS. Order Number DS9637AMJ/883 See NS Package Number J08A © 1998 National Semiconductor Corporation DS009621 www.national.com DS9637A Dual Differential Line Receiver May 1998 Absolute Maximum Ratings (Note 2) ± 15V ± 15V Input Potential to Ground Differential Input Voltage Output Potential to Ground Output Sink Current If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Storage Temperature Range Ceramic DIP −65˚C to + 175˚C Molded DIP −65˚C to + 150˚C Lead Temperature Ceramic DIP (Soldering, 30 seconds) 300˚C Molded DIP and SO Package (Soldering, 10 seconds) 265˚C Maximum Power Dissipation (Note 1) at 25˚C Cavity Package 1300 mW Molded Package 930 mW SO Package 810 mW −0.5V to 7.0V VCC Lead Potential to Ground −0.5V to +5.5V 50 mA Recommended Operating Conditions DS9637AM Supply Voltage (VCC) Operating Temperature (TA) DS9637AC Supply Voltage (VCC) Operating Temperature (TA) Min 4.5 −55 Max 5.5 +125 Units V ˚C 4.75 0 5.25 +70 V ˚C Note 1: Derate cavity package 8.7 mW/˚C above 25˚C; derate molded DIP package 7.5 mW/˚C above 25˚C; derate SO package 6.5 mW/˚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 Conditions Min Max Units −7.0V ≤ VCM ≤ +7.0V −0.2 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 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 V −40 −75 −100 mA 50 mA Current (Note 5) ICC Supply Current VCC = Max, VI+ = 0.5V, VI− = GND 35 VHYST Input Hysteresis VCM = ± 7.0V (See Curves) 70 mV 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 −55˚C to +125˚C temperature range for DS9637AM and across the 0˚C to +70˚C range for the DS9637ASC. 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. Switching Characteristics VCC = 5.0V, TA = 25˚C Symbol tPLH Parameter Propagation Delay Time Typ Max Units See AC Test Circuit Conditions Min 15 25 ns See AC Test Circuit 13 25 ns Low to High tPHL Propagation Delay Time High to Low www.national.com 2 Switching Characteristics (Continued) DS009621-2 FIGURE 1. Equivalent Circuit Typical Input/Output Transfer Characteristics DS009621-3 DS009621-4 3 www.national.com AC Test Circuit and Waveforms DS009621-6 VI Amplitude: 1.0V Offset: 0.5V Pulse Width: 100 ns PRR: 5.0 MHz tr = tf ≤ 5.0 ns DS009621-5 Notes: CL includes jig and probe capacitance. All diodes are FD700 or equivalent. FIGURE 3. FIGURE 2. Typical Applications DS009621-7 Notes: RT ≥ 50Ω for RS-422 operation. RT combined with input impedance of receivers must be greater than 90Ω. FIGURE 4. RS-422 System Application (FIPS 1020) Differential Simplex Bus Transmission www.national.com 4 Physical Dimensions inches (millimeters) unless otherwise noted Ceramic Dual-In-Line Package (J) Order Number DS9637AMJ/883 NS Package Number J08A Molded Surface Mount Package (M) Order Number DS9637ACM NS Package Number M08A 5 www.national.com DS9637A Dual Differential Line Receiver Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Molded Dual-In-Line Package (N) Order Number DS9637ACN 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. 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