DS89C21 NSC | Alldatasheet

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n Meets TIA/EIA-422-A (RS-422) and CCITT V.11 recommendation n LOW POWER design — 15 mW typical n Guaranteed AC parameters: — Maximum driver skew 2.0 ns — Maximum receiver skew 4.0 ns n Extended temperature range: −40˚C to +85˚C n Available in SOIC packaging n Operates over 20 Mbps n Receiver OPEN input failsafe featureConnection Diagram Truth Tables Driver Input Outputs DI DO DO * HH L LL H Receiver Inputs Output RI–RI* RO VDIFF ≥ +200 mV H VDIFF ≤ −200 mV L OPEN † H †Non-terminated DS011753-1 Order Number DS89C21TM See NS Package Number M08A June 1998 DS89C21 Differential CMOS Line Driver and Receiver Pair © 1998 National Semiconductor Corporation DS011753 www.national.com

Absolute Maximum Ratings(Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (V CC )7 V Driver Input Voltage (DI) −1.5V to V CC + 1.5V Driver Output Voltage (DO, DO ) −0.5V to +7V Receiver Input Voltage — V CM (RI, RI*) ±14V Differential Receiver Input ±14V Voltage — VDIFF (RI, RI*) Receiver Output Voltage (RO) −0.5V to V CC +0.5V Receiver Output Current (RO) ±25 mA Storage Temperature Range (TSTG ) −65˚C to +150˚C Lead Temperature (TL) +260˚C (Soldering 4 sec.) Maximum Junction Temperature 150˚C Maximum Package Power Dissipation@+25˚C M Package 714 mW Derate M Package 5.7 mW/˚C above +25˚C Recommended Operating Conditions Min Max Units Supply Voltage (VCC ) 4.50 5.50 V Operating Temperature (TA) −40 +85 ˚C Input Rise or Fall Time (DI) 500 ns Electrical Characteristics(Notes 2, 3) Over recommended supply voltage and operating temperature ranges, unless otherwise specified. Symbol Parameter Conditions Pin Min Typ Max Units DRIVER CHARACTERISTICS V IH Input Voltage HIGH 2.0 V CC V VIL Input Voltage LOW DI GND 0.8 V IIH,IIL Input Current V IN = VCC , GND, 2.0V, 0.8V 0.05 ±10 µA VCL Input Clamp Voltage I IN = −18 mA −1.5 V VOD1 Unloaded Output Voltage No Load DO, DO * 4.2 6.0 V VOD2 Differential Output Voltage R L = 100Ω 2.0 3.0 V ΔVOD2 Change in Magnitude of VOD2 5.0 400 mV for Complementary Output States VOD3 Differential Output Voltage R L = 150Ω 2.1 3.1 V VOD4 Differential Output Voltage R L = 3.9 kΩ 4.0 6.0 V VOC Common Mode Voltage R L = 100Ω 2.0 3.0 V ΔVOC Change in Magnitude of VOC 2.0 400 mV for Complementary Output States IOSD Output Short Circuit Current V OUT = 0V −30 −115 −150 mA IOFF Output Leakage Current V CC = 0V V OUT = +6V 0.03 +100 µA VOUT = −0.25V −0.08 −100 µA RECEIVER CHARACTERISTICS V TL,V TH Differential Thresholds V IN = +7V, 0V, −7V RI, RI* −200 ±25 +200 mV VHYS Hysteresis V CM = 0V 20 50 mV R IN Input Impedance V IN = −7V, +7V, Other= 0V 5.0 9.5 k Ω IIN Input Current Other Input = 0V, V IN = +10V +1.0 +1.5 mA VCC = 5.5V and V IN = +3.0V 0 +0.22 mA VCC = 0V V IN = +0.5V −0.04 mA VIN = −3V 0 −0.41 mA VIN = −10V −1.25 −2.5 mA VOH Output HIGH Voltage I OH = −6 mA V DIFF = +1V RO 3.8 4.9 V VDIFF = OPEN 3.8 4.9 V VOL Output LOW Voltage I OL = +6 mA, VDIFF = −1V 0.08 0.3 V IOSR Output Short Circuit Current V OUT = 0V −25 −85 −150 mA www.national.com 2

Over recommended supply voltage and operating temperature ranges, unless otherwise specified. Over recommended supply voltage and operating temperature ranges, unless otherwise specified. should be operated at these limits. The tables of “Electrical Characteristics” specify conditions for device operation. Note 3: All typicals are given for VCC = 5.0V and TA = 25˚C. Note 4:f= 1 MHz, tr and tf≤ 6 ns. Note 5: ESD Rating: HBM (1.5 kΩ , 100 pF) all pins≥ 2000V. FIGURE 1. VOD and VOC Test Circuit

Physical Dimensionsinches (millimeters) unless otherwise noted LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DE- VICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMI- CONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or sys- tems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose fail- 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. 2. A critical component in any component of a life support device or system whose failure to perform can be rea- sonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. National Semiconductor Corporation Americas Tel: 1-800-272-9959 Fax: 1-800-737-7018 Email: support@nsc.com www.national.com National Semiconductor Europe Fax: +49 (0) 1 80-530 85 86 Email: europe.support@nsc.com 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: sea.support@nsc.com National Semiconductor Japan Ltd. Tel: 81-3-5620-6175 Fax: 81-3-5620-6179 Order Number DS89C21TM DS89C21 Differential CMOS Line Driver and Receiver Pair 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.