DS8922

DS8922 NSC | Alldatasheet

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n 12 ns typical propagation delay n Output skew —±0.5 ns typical n Meets the requirements of EIA Standard RS-422 n Complementary Driver Outputs n High differential or common-mode input voltage ranges of±7V n ±0.2V receiver sensitivity over the input voltage range n Receiver input fail-safe circuitry n Receiver input hysteresis — 70 mV typical n Glitch free power up/down n TRI-STATE outputs Connection Diagrams TRI-STATE® is a registered trademark of National Semiconductor Corp. DS8922A Dual-In-Line DS008511-1 Order Number DS8922M, DS8922N, DS8922AM or DS8922AN See NS Package Number M16A or N16E June 1998 DS8922/DS8922A/DS8923A TRI-STATE RS-422 Dual Differential Line Driver and Receiver Pairs © 1998 National Semiconductor Corporation DS008511 www.national.com

Connection Diagrams (Continued) Truth Tables DS8922/22A EN1 EN2 RO1 RO2 DO1 DO2 0 0 ACTIVE ACTIVE ACTIVE ACTIVE 1 0 HI-Z ACTIVE HI-Z ACTIVE 0 1 ACTIVE HI-Z ACTIVE HI-Z 1 1 HI-Z HI-Z HI-Z HI-Z DS8923A DEN REN RO1 RO2 DO1 DO2 0 0 ACTIVE ACTIVE ACTIVE ACTIVE 1 0 ACTIVE ACTIVE HI-Z HI-Z 0 1 HI-Z HI-Z ACTIVE ACTIVE 1 1 HI-Z HI-Z HI-Z HI-Z DS8923A Dual-In-Line DS008511-2 Order Number DS8923AM, DS8923AN, See NS Package Number M16A or N16E www.national.com 2

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 7V Drive Input Voltage −0.5V to +7V Output Voltage 5.5V Receiver Output Sink Current 50 mA Receiver Input Voltage ±10V Differential Input Voltage ±12V Maximum Package Power Dissipation@ +25˚C M Package 1300 mW N Package 1450 mW Derate M Package 10.4 mW/˚C above +25˚C Derate N Package 11.6 mW/˚C above +25˚C Storage Temperature Range −65˚C to +165˚C Lead Temp. (Soldering, 4 seconds) 260˚C Recommended Operating Conditions Min Max Units Supply Voltage 4.5 5.5 V Temperature (T A) 0 70 ˚C DS8922/22A and DS8923A Electrical Characteristics(Notes 2, 3, 4) Symbol Conditions Min Typ Max Units RECEIVER V TH −7V ≤ VCM ≤ +7V −200 ±35 +200 mV VHYST −7V ≤ VCM ≤ +7V 15 70 mV R IN V IN = −7V, +7V (Other Input= GND) 4.0 6.0 k Ω IIN VIN = 10V 3.25 mA VIN = −10V −3.25 mA VOH V CC = MIN, IOH = − 400 µA 2.5 V VOL V CC = MAX, IOL = 8 mA 0.5 V ISC V CC = MAX, VOUT = 0V −15 −100 mA DRIVER V OH V CC = MIN, IOH = −20 mA 2.5 V VOL V CC = MIN, IOL = +20 mA 0.5 V IOFF V CC = 0V, VOUT = 5.5V 100 µA VT 2.0 V |VOS –V OS | 0.4 V ISC V CC = MAX, VOUT = 0V −30 −150 mA DRIVER and RECEIVER I OZ VOUT = 2.5V 50 µA TRI-STATE V CC = MAX V OUT = 0.4V −50 µA Leakage I CC VCC = MAX ACTIVE 76 mA TRI-STATE 78 mA DRIVER and ENABLE INPUTS V IH 2.0 V VIL 0.8 V IIL V CC = MAX, VIN = 0.4V −40 −200 µA IIH V CC = MAX, VIN = 2.7V 20 µA II V CC = MAX, VIN = 7.0V 100 µA VCL V CC = MIN, IIN = −18 mA −1.5 V www.national.com3

Receiver Switching Characteristics (Figures 1, 2, 3) Parameter Conditions Min Typ Max Units 8922 8922A/23A TpLH CL = 30 pF 12 22.5 20 ns TpHL CL = 30 pF 12 22.5 20 ns |TpLH –T pHL |C L = 30 pF 0.5 5 3.5 ns Skew (Channel to Channel) CL = 30 pF 0.5 3.0 2.0 ns TpLZ CL = 15 pF S2 Open 15 ns TpHZ CL = 15 pF S1 Open 15 ns TpZL CL = 30 pF S2 Open 20 ns TpZH CL = 30 pF S1 Open 20 ns Driver Switching Characteristics Parameter Conditions Min Typ Max Units 8922 8922A/23A SINGLE ENDED CHARACTERISTICS (Figures 4, 5, 6, 8) TpLH CL = 30 pF 12 15 15 ns TpHL CL = 30 pF 12 15 15 ns TTLH CL = 30 pF 5 10 10 ns TTHL CL = 30 pF 5 10 10 ns |TpLH –T pHL |C L = 30 pF 0.5 ns Skew CL = 30 pF (Note 5) 0.5 5 3.5 ns Skew (Channel to Channel) 0.5 3.0 2.0 ns T pLZ CL = 30 pF 15 ns TpHZ CL = 30 pF 15 ns TpZL CL = 30 pF 20 ns TpZH CL = 30 pF 20 ns DIFFERENTIAL SWITCHING CHARACTERISTICS (Note 6), (Figure 4) TpLH CL = 30 pF 12 15 15 ns TpHL CL = 30 pF 12 15 15 ns |TpLH –T pHL |C L = 30 pF 0.5 6.0 2.75 ns Note 1: “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the device should be operated at these limits. The Table of “Electrical Characteristics” provides conditions for actual device operation. Note 2: All currents into device pins are shown as positive values; all currents out of the device are shown as negative; all voltages are referenced to ground unless otherwise specified. All values shown as max or min are classified on absolute value basis. Note 3: All typical values are VCC = 5V, TA = 25˚C. Note 4: Only one output at a time should be shorted. Note 5: Difference between complementary outputs at the 50% point. Note 6: Differential Delays are defined as calculated results from single ended rise and fall time measurements. This approach in establishing AC performance specifications has been taken due to limitations of available Automatic Test Equipment (ATE). The calculated ATE results assume a linear transition between measurement points and are a result of the following equations: Where: Tcp = Crossing Point Tra, Trb, Tfa and Tfb are time measurements with respect to the input. www.national.com 4

Typical Performance Characteristics(DS8923A) (Continued) Receiver VOH vs IOH vs Temperature DS008511-18 Receiver VOH vs IOH vs VCC DS008511-19 Receiver VOL vs IOL vs Temperature DS008511-20 Receiver VOL vs IOL vs VCC DS008511-21 Driver Differential Propagation Delay vs Temperature DS008511-22 Driver Differential Propagation Delay vs V CC DS008511-23 www.national.com 8

Typical Performance Characteristics(DS8923A) (Continued) Receiver Propagation Delay vs Temperature DS008511-24 Receiver Propagation Delay vs V CC DS008511-25 Driver VOD vs Temperature DS008511-26 Driver VOD vs VCC DS008511-27 Driver VOD vs RL DS008511-28 Driver Differential Transition Time vs Temperature DS008511-29 www.national.com9

Typical Performance Characteristics(DS8923A) (Continued) Driver Differential Transition Time vs VCC DS008511-30 Supply Current vs Temperature DS008511-31 Supply Current vs VCC DS008511-32 ICC vs Driver Switching Frequency DS008511-33 Driver Short Circuit Current vs Temperature DS008511-34 Driver Short Circuit Current vs V CC DS008511-35 www.national.com 10

Typical Performance Characteristics(DS8923A) (Continued) Typical Applications Receiver Short Circuit Current vs Temperature DS008511-36 Receiver Short Circuit Current vs V CC DS008511-37 DS008511-11 www.national.com11

Typical Applications(Continued) ST504 and ST412 Applications DS008511-12 www.national.com 12

Physical Dimensionsinches (millimeters) unless otherwise noted Order Number DS8922M, DS8922AM, or DS8923AM Molded Dual-In-Line Package (N) Order Number DS8922N, DS8922AN, or DS8923AN www.national.com13

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 DS8922/DS8922A/DS8923A TRI-STATE RS-422 Dual Differential Line Driver and Receiver Pairs 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.