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 00577701 (1⁄4 of unit shown) DS1489: RF = 10k DS1489A: RF = 2k Dual-In-Line or Small-Out Line Package 00577702 Top View Order Number DS1489M, DS1489MX, DS1489N, DS1489AM, DS1489AMX or DS1489AN See NS Package Number M14A or N14A © 2002 National Semiconductor Corporation DS005777 www.national.com DS1489/DS1489A Quad Line Receiver July 2002 DS1489/DS1489A AC Test Circuit and Voltage Waveforms 00577703 00577704 FIGURE 1. www.national.com 2 (Note 2) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Power Supply Voltage ± 30V Output Load Current 20 mA Power Dissipation (Note 3) Operating Temperature Range Maximum Power Dissipation (Note 1) at 25˚C 10V Input Voltage Range 1207 mW SO Package 1042 mW Lead Temperature (Soldering, 4 sec.) 1W 0˚C to +75˚C Storage Temperature Range Molded DIP Package 260˚C −65˚C to +150˚C Note 1: Derate molded DIP package 9.7 mW/˚C above 25˚C; derate SO package 8.33 mW/˚C above 25˚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, Input High Threshold Voltage Min Typ Max Units DS1489 TA = 25˚C 1.0 1.25 1.5 V 1.6 V DS1489A TA = 25˚C 1.75 2.00 2.25 V 2.40 V IOUT = 10 mA 0.9 1.55 VTL IIN VOUT ≥ 2.5V, Input Low Threshold Voltage Input Current TA = 25˚C 0.75 IOUT = −0.5 mA 0.65 VIN = +25V +3.6 1.00 1.25 V 1.35 V +5.6 +8.3 mA −8.3 VIN = −25V −3.6 −5.6 VIN = +3V +0.43 +0.53 VIN = −3V −0.43 −0.53 VIN = 0.75V 2.6 3.8 Input = Open 2.6 mA mA mA VOH Output High Voltage IOUT = −0.5 mA VOL Output Low Voltage VIN = 3.0V, IOUT = 10 mA ISC Output Short Circuit Current VIN = 0.75V −3.0 ICC Supply Current VIN = 5.0V 14 26 mA Pd Power Dissipation VIN = 5.0V 70 130 mW 5.0 V 3.8 5.0 V 0.33 0.45 V mA Switching Characteristics VCC = 5V, TA = 25˚C Symbol tpd1 Parameter Input to Output “High” Typ Max Units RL = 3.9k, (Figure 1) (AC Test Circuit) Conditions Min 28 85 ns RL = 390Ω, (Figure 1) (AC Test Circuit) 20 50 ns Propagation Delay tpd0 Input to Output “Low” Propagation Delay tr Output Rise Time RL = 3.9k, (Figure 1) (AC Test Circuit) 110 175 ns tf Output Fall Time RL = 390Ω, (Figure 1) (AC Test Circuit) 9 20 ns 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 DS1489/DS1489A Absolute Maximum Ratings DS1489/DS1489A Typical Characteristics VCC = 5.0V, TA = +25˚C unless otherwise noted 00577710 00577707 FIGURE 5. Input Threshold Voltage vs Temperature FIGURE 2. Input Current 00577711 00577708 FIGURE 6. Input Threshold vs Power Supply Voltage FIGURE 3. DS1489 Input Threshold Voltage Adjustment 00577712 00577709 FIGURE 7. Noise Rejection vs Capacitance for DS1489A FIGURE 4. DS1489A Input Threshold Voltage Adjustment www.national.com 4 DS1489/DS1489A Typical Application Information 00577705 *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 00577713 00577714 00577715 Application of DS1488, DS1489A and UART 00577716 5 www.national.com DS1489/DS1489A Physical Dimensions inches (millimeters) unless otherwise noted SO Package (M) Order Number DS1489M, DS1489MX or DS1489AM, DS1489AMX NS Package Number M14A www.national.com 6 DS1489/DS1489A Quad Line Receiver Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Molded Dual-In-Line Package (N) Order Number DS1489N or DS1489AN NS Package Number N14A 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 Email: [email protected] www.national.com National Semiconductor Europe Fax: +49 (0) 180-530 85 86 Email: [email protected] Deutsch Tel: +49 (0) 69 9508 6208 English Tel: +44 (0) 870 24 0 2171 Français Tel: +33 (0) 1 41 91 8790 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.