Document
DS7830/DS8830 Dual Differential Line Driver
March 1992
DS7830/DS8830 Dual Differential Line Driver
General Description
The DS7830/DS8830 is a dual differential line driver that also performs the dual four-input NAND or dual four-input AND function. TTL (Transistor-Transistor-Logic) multiple emitter inputs allow this line driver to interface with standard TTL systems. The differential outputs are balanced and are designed to drive long lengths of coaxial cable, strip line, or twisted pair transmission lines with characteristic impedances of 50Ω to 500Ω. The differential feature of the output eliminates troublesome ground-loop errors normally associated with single-wire transmissions.
Features
n Single 5V power supply n Diode protected outputs for termination of positive and negative voltage transients n Diode protected inputs to prevent line ringing n High speed n Short circuit protection
Connection Diagram
Dual-In-Line and Flat Package
DS005799-2
Top View Order Number DS8830N See NS Package Number N14A For Complete Military 883 Specificatons, See RETS Data Sheet. Order Number DS7830J/883 or DS7830W/883 See NS Package Number J14A
© 1999 National Semiconductor Corporation
DS005799
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Absolute Maximum Ratings (Note 2)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. VCC Input Voltage Storage Temperature Lead Temperature (Soldering, 4 sec.) Output Short Circuit Duration (125˚C) Maximum Power Dissipation (Note 1) at 25˚C Cavity Package Molded Package 7.0V 5.5V −65˚C to +150˚C 260˚C 1 second
Operating Conditions
Min Supply Voltage (VCC) DS8730 DS8830 Temperature (TA) DS7830 DS8830 4.5 4.75 −55 0 Max 5.5 5.25 +125 +70 Units V V ˚C ˚C
Note 1: Derate cavity package 8.7 mW/˚C above 25˚C; derate molded package 9.7 mW/˚C above 25˚C.
1308 mW 1207 mW
Electrical Characteristics (Notes 3, 4)
Symbol VIH VIL VOH VOL IIH IIL ISC ICC VI Parameter Logical “1” Input Voltage Logical “0” Input Voltage Logical “1” Output Voltage Logical “0” Output Voltage Logical “1” Input Current Logical “0” Input Current Output Short Circuit Current Supply Current Input Clamp VIN = 0.8V VIN = 2.0V VIN = 2.4V VIN = 5.5V VIN = 0.4V VCC = 5.0V, TA = 125˚C, (Note 5) VIN = 5.0V, (Each Driver) VCC = Min, IIN = − 12 mA −40 −100 11 −1.0 IOUT = −0.8 mA IOUT = 40 mA IOUT = 32 mA IOUT = 40 mA 2.4 1.8 3.3 0.2 0.22 0.4 0.5 120 2 −4.8 −120 18 −1.5 Conditions Min 2.0 0.8 Typ Max Units V V V V V V µA mA mA mA mA V
Switching Characteristics
TA = 25˚C, VCC = 5V, unless otherwise noted Symbol tpd1 tpd0 tpd1 tpd0 t1 t2 Differential Delay Differential Delay Propagation Delay NAND Gate Parameter Propagation Delay AND Gate Conditions RL = 400Ω, CL = 15 pF (Figure 1 ) RL = 400Ω, CL = 15 pF (Figure 1 ) Load, 100Ω and 5000 pF, (Figure 2 ) Load, 100Ω and 5000 pF, (Figure 2 )
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 −55˚C to +125˚C temperature range for the DS7830 and across the 0˚C to +70˚C range for the DS8830. Typical values for TA = 25˚C and VCC = 5.0V. 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: Only one output at a time should be shorted.
Min
Typ 8 11 8 5 12 12
Max 12 18 12 8 16 16
Units ns ns ns ns ns ns
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AC Test Circuit and Switching Time Waveforms
DS005799-4
DS005799-9
f = 1 MHz tr = tf ≤ 10 ns (10% to 90%) Duty cycle = 50%
FIGURE 1.
DS005799-8 DS005799-10
FIGURE 2.
Typical Performance Characteristics
Output High Voltage (Logical “1”) vs Ouput Current Differential Delay vs Temperature Threshold Voltage vs Temperature
DS005799-11 DS005799-7
DS005799-12
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Typical Performance Characteristics
Differential Output Voltage (|VAND - VNAND| ) vs Differential Output Current
(Continued)
Power Dissipation (No Load) vs Data Input Frequency
Output Low Voltage (Logical “0“) vs Output Current
DS005799-14 DS005799-13 DS005799-15
Typical Application
Digital Data Transmission
DS005799-3
†Exact value depends on line length.
*Optional to control response time.
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Schematic Diagram
DS005799-1
*2 Per Package
5
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Physical Dimensions
inches (millimeters) unless otherwise noted
Ceramic Dual-In-Line Package (J) Order Number DS7830J or DS8830J NS Package Number J14A
Molded Dual-In-Line Package (N) Order Number DS8830N NS Package Number N14A
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DS7830/DS8830 Dual Differential Line Driver
Notes
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