DS1489/DS1489A Quad Line Receiver General Description Features The DS1489/DS1489A are quad line receivers designed to interface data terminal equipment with data communications equipment. They are constructed on a single monolithic silicon chip. These devices satisfy the specifications of EIA Standard RS-232D. The DS1489/DS1489A meet and exceed the specifications of MC1489/MC1489A and are pin-for-pin replacements. n n n n n Four separate receivers per package Programmable threshold Built-in input threshold hysteresis “Fail safe” operating mode: high output for open inputs Inputs withstand ± 30V Schematic and Connection Diagrams DS005777-1 (1⁄4 of unit shown) DS1489: RF = 10k DS1489A: RF = 2k Dual-In-Line Package DS005777-2 Top View Order Number DS1489M, DS1489N DS1489AM or DS1489AN See NS Package Number M14A or N14A © 1998 National Semiconductor Corporation DS005777 www.national.com DS1489/DS1489A Quad Line Receiver May 1998 AC Test Circuit and Voltage Waveforms DS005777-3 DS005777-4 FIGURE 1. www.national.com 2 Absolute Maximum Ratings (Note 2) Storage Temperature Range −65˚C to +150˚C Maximum Power Dissipation (Note 1) at 25˚C Molded DIP Package 1207 mW SO Package 1042 mW Lead Temperature (Soldering, 4 sec.) 260˚C If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Power Supply Voltage Input Voltage Range Output Load Current Power Dissipation (Note 3) Operating Temperature Range 10V ± 30V Note 1: Derate molded DIP package 9.7 mW/˚C above 25˚C; derate SO package 8.33 mW/˚C above 25˚C. 20 mA 1W 0˚C to +75˚C Electrical Characteristics (Notes 3, 4, 5) DS1489/DS1489A: The following apply for VCC = 5.0V ± 1%, 0˚C ≤ TA ≤ +75˚C unless otherwise specified. Symbol VTH Parameter Conditions VOUT ≤ 0.45V, IOUT = 10 mA Input High Threshold Voltage DS1489 Min Typ Max Units 1.0 1.25 1.5 V TA = 25˚C 0.9 DS1489A TA = 25˚C 1.75 1.6 V 2.00 2.25 V 2.40 V 1.00 1.25 V 1.35 V +5.6 +8.3 mA −8.3 mA 1.55 VTL Input Low Threshold Voltage VOUT ≥ 2.5V, IOUT = −0.5 mA IIN Input Current VIN = +25V VIN = −25V VIN = +3V VOH VIN = −3V IOUT = −0.5 mA Output High Voltage TA = 25˚C 0.75 0.65 +3.6 −3.6 −5.6 +0.43 +0.53 −0.43 −0.53 2.6 3.8 5.0 V 2.6 3.8 5.0 V 0.33 0.45 VIN = 0.75V Input = Open VOL Output Low Voltage ISC Output Short Circuit Current ICC Supply Current VIN = 3.0V, IOUT = 10 mA VIN = 0.75V VIN = 5.0V Pd Power Dissipation VIN = 5.0V mA mA −3.0 V mA 14 26 mA 70 130 mW Switching Characteristics VCC = 5V, TA = 25˚C Symbol tpd1 Parameter Input to Output “High” Conditions RL = 3.9k, (Figure 1) (AC Test Circuit) Min Typ Max Units 28 85 ns RL = 390Ω, (Figure 1) (AC Test Circuit) 20 50 ns RL = 3.9k, (Figure 1) (AC Test Circuit) RL = 390Ω, (Figure 1) (AC Test Circuit) 110 175 ns 9 20 ns Propagation Delay tpd0 Input to Output “Low” Propagation Delay tr Output Rise Time tf Output Fall Time Note 2: “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. Except for “Operating Temperature Range” 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 0˚C to +75˚C temperature range for the DS1489 and DS1489A. Note 4: All currents into device pins shown as positive, out of device pins as negative, all voltages referenced to ground unless otherwise noted. All values shown as max or min on absolute value basis. Note 5: These specifications apply for response control pin = open. 3 www.national.com Typical Characteristics VCC = 5.0V, TA = +25˚C unless otherwise noted DS005777-10 DS005777-7 FIGURE 5. Input Threshold Voltage vs Temperature FIGURE 2. Input Current DS005777-11 DS005777-8 FIGURE 6. Input Threshold vs Power Supply Voltage FIGURE 3. DS1489 Input Threshold Voltage Adjustment DS005777-12 DS005777-9 FIGURE 7. Noise Rejection vs Capacitance for DS1489A FIGURE 4. DS1489A Input Threshold Voltage Adjustment www.national.com 4 Typical Application Information DS005777-5 *Optional for noise filtering. Applications Using the Response Control Pin Noise Filter See Figure 7 Threshold Shift See Figures 3, 4 Noise Filter and Threshold Shift See Figures 3, 4, 7 DS005777-13 DS005777-14 DS005777-15 Application of DS1488, DS1489A and INS8250 DS005777-16 5 www.national.com 6 Physical Dimensions inches (millimeters) unless otherwise noted SO Package (M) Order Number DS1489M or DS1489AM NS Package Number M14A Molded Dual-In-Line Package (N) Order Number DS1489N or DS1489AN NS Package Number N14A 7 www.national.com DS1489/DS1489A Quad Line Receiver 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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