DS36954V

DS36954 NSC | Alldatasheet

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n Pinout for SCSI interface n Compact 20-pin PLCC or SOIC package n Meets EIA-485 standard for multipoint bus transmission n Greater than 60 mA source/sink currents n Thermal shutdown protection n Glitch-free driver outputs on power up and down Connection Diagrams Logic Diagrams TRI-STATE® is a registered trademark of National Semiconductor Corporation. DS011014-1 Order Number DS36954V See NS Package Number V20A DS011014-19 Order Number DS36954M See NS Package Number M20B DS011014-2 July 1998 DS36954 Quad Differential Bus Transceiver © 1999 National Semiconductor Corporation DS011014 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 7V Control Input Voltage V CC + 0.5V Driver Input Voltage V CC + 0.5V Driver Output Voltage/ Receiver Input Voltage −10V to +15V Receiver Output Voltage 5.5V Continuous Power Dissipation@ +25˚C V Package 1.73W M Package 1.73W Derate V Package 13.9 mW/˚C above +25˚C Derate M Package 13.7 mW/˚C above +25˚C Storage Temperature Range −65˚C to +150˚C Lead Temperature (Soldering 4 Sec.) 260˚C Recommended Operating Conditions Min Max Units Supply Voltage, VCC 4.75 5.25 V Bus Voltage −7 +12 V Operating Free Air Temperature (T A) 0 +70 ˚C Electrical Characteristics(Note 2) Over Supply Voltage and Operating Temperature ranges, unless otherwise specified Symbol Parameter Conditions Min Typ Max Units DRIVER CHARACTERISTICS V ODL Differential Driver Output I L = 60 mA 1.5 1.9 V Voltage (Full Load) V CM = 0V VOD Differential Driver Output R L = 100Ω (EIA-422) 2.0 2.25 V Voltage (Termination Load) R L = 54Ω (EIA-485) 1.5 2.0 V ΔIVODI Change in Magnitude of Driver R L = 54 or 100Ω Differential Output Voltage for (Note 4)(Figure 1 ) 0.2 V Complementary Output States (EIA-422/485) VOC Driver Common Mode R L = 54Ω (Figure 1 )(EIA-485) 3.0 V Output Voltage (Note 5) ΔIVOCI Change in Magnitude of (Note 4) (Figure 1 ) 0.2 V Common Mode Output Voltage (EIA-422/485) VOH Output Voltage High I OH = −55 mA 2.7 3.2 V VOL Output Voltage Low I OL = 55 mA 1.4 1.7 V VIH Input Voltage High 2.0 V VIL Input Voltage Low 0.8 V VCL Input Clamp Voltage I CL = −18 mA −1.5 V IIH Input High Current V IN = 2.4V (Note 3) 20 µA IIL Input Low Current V IN = 0.4V (Note 3) −20 µA IOSC Driver Short-Circuit V O = −7V (EIA-485) −130 −250 mA Output Current V O = 0V (EIA-422) −90 −150 mA (Note 9) V O = +12V (EIA-485) 130 250 mA RECEIVER CHARACTERISTICS I OSR Short Circuit Output Current VO = 0V (Note 9) −15 −28 −75 mA IOZ TRI-STATE ® Output Current V O = 0.4V to 2.4V 20 µA VOH Output Voltage High V ID = 0.2V, IOH = 0.4 mA 2.4 3.0 V VOL Output Voltage Low V ID = −0.2V, IOL = 4 mA 0.35 0.5 V VTH Differential Input High V O = VOH ,IO = −0.4 mA 0.03 0.2 V Threshold Voltage (EIA-422/485) VTL Differential Input Low V O = VOL ,IO = 4.0 mA −0.20 −0.03 V Threshold Voltage (Note 6) (EIA-422/485) VHST Hysteresis (Note 7) V CM = 0V 35 60 mV DRIVER AND RECEIVER CHARACTERISTICS V IH Enable Input Voltage High 2.0 V VIL Enable Input Voltage Low 0.8 V www.national.com 2

Electrical Characteristics(Note 2) (Continued) Over Supply Voltage and Operating Temperature ranges, unless otherwise specified Symbol Parameter Conditions Min Typ Max Units DRIVER AND RECEIVER CHARACTERISTICS V CL Enable Input Clamp Voltage I CL = −18 mA −1.5 V IIN Line Input Current Other Input = 0V V I = +12V 0.5 1.0 mA (Note 8) DE/RE = 0.8V VI = −7V −0.45 −0.8 mA DE4 = 0.8V IING Line Input Current Other Input = 0V V I = +12V 1.0 mA (Note 8) DE/RE and DE4 = 2V VCC = 3.0V V I = −7V −0.8 mA TA = +25˚C IIH Enable Input V IN = 2.4V V CC = 3.0V 1 40 µA Current High DE/RE VCC = 4.75V 1 µA VCC = 5.25V 1 40 µA VIN = 2.4V V CC = 3.0V 1 20 µA DE4 or RE4 VCC = 5.25V 1 20 µA IIL Enable Input V IN = 0.8V V CC = 3.0V −6 −40 µA Current Low DE/RE VCC = 4.75V −12 µA VCC = 5.25V −14 −40 µA VIN = 0.8V V CC = 3.0V −3 −20 µA DE4 or RE4 VCC = 5.25V −7 −20 µA ICCD Supply Current (Note 10) No Load, DE/RE and DE4 = 2.0V 75 90 mA ICCR Supply Current (Note 10) No Load, DE/RE and RE4 = 0.8V 50 70 mA Switching Characteristics Over Supply Voltage and Operating Temperature ranges, unless otherwise specified. Symbol Parameter Conditions Min Typ Max Units DRIVER SINGLE-ENDED CHARACTERISTICS t PZH Output Enable Time to High Level R L = 110Ω (Figure 5)3 5 4 0 n s tPZL Output Enable Time to Low Level ( Figure 6)2 5 4 0 n s tPHZ Output Disable Time to High Level ( Figure 5)1 5 2 5 n s tPLZ Output Disable Time to Low Level ( Figure 6)3 5 4 0 n s DRIVER DIFFERENTIAL CHARACTERISTICS t r,tf Rise and Fall Time R L = 54Ω 13 16 ns tPLHD Differential Propagation C L = 50 pF 9 15 19 ns tPHLD Delays (Note 15) C D = 15 pF 9 12 19 ns tSKD |tPLHD −tPHLD | Diff. Skew ( Figures 3, 4, 9)3 6 n s RECEIVER CHARACTERISTICS t PLHD Differential Propagation Delays C L = 15 pF 9 14 19 ns tPHLD VCM = 2.0V 9 13 19 ns tSKD |tPLHD −tPHLD | Diff. Receiver Skew ( Figure 7)1 3 n s tPZH Output Enable Time to High Level C L = 15 pF 15 22 ns tPZL Output Enable Time to Low Level ( Figure 8)2 0 3 0 n s tPHZ Output Disable Time from High Level 20 30 ns tPLZ Output Disable Time from Low Level 17 25 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 devices should be operated at these limits. The tables of “Electrical Characteristics” specify conditions for device operation. Note 2:Current into device pins is defined as positive. Current out of device pins is defined as negative. All voltages are referenced to ground unless otherwise speci- fied. Note 3: IIH and IILinclude driver input current and receiver TRI-STATE leakage current on DR(1–3). Note 4:Δ IVODI andΔ IVOCI are changes in magnitude of VOD and VOC , respectively, that occur when the input changes state. www.national.com3

Parameter Measurement Information(Continued) Note 16: On transceivers 1–3 the driver is loaded with receiver input conditions when DE/RE is high. Do not exceed the package power dissipation limit when testing. www.national.com7

Physical Dimensionsinches (millimeters) unless otherwise noted Order Number DS36954M Order Number DS36954V www.national.com9

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 is 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: 81-3-5639-7560 Fax: 81-3-5639-7507 DS36954 Quad Differential Bus Transceiver 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.