Datasheet DS8830N Datasheet (NSC)

DS7830
Dual Differential Line Driver

DS7830 Dual Differential Line Driver

August 2000

General Description

The DS7830 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.

Connection Diagram

Dual-In-Line and Flat Package

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

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Top View

For Complete Military 883 Specificatons, See RETS Data Sheet.

Order Number DS7830J/883 or DS7830W/883

See NS Package Number J14A

© 2000 National Semiconductor Corporation DS005799 www.national.com

Absolute Maximum Ratings (Note 2)

If Military/Aerospace specified devices are required,

DS7830

please contact theNational Semiconductor Sales Office/
Distributors for availability and specifications.

V

CC

Input Voltage 5.5V
Storage Temperature −65˚C to +150˚C
Lead Temperature (Soldering, 4 sec.) 260˚C
Output Short Circuit Duration (125˚C) 1 second
Maximum Power Dissipation (Note 1)

7.0V

Cavity Package 1308 mW

Operating Conditions

Min Max Units

Supply Voltage (V

DS7830 4.5 5.5 V

Temperature (T

DS7830 −55 +125 ˚C

Note 1: Derate cavity package 8.7 mW/˚C above 25˚C; derate molded pack­age 9.7 mW/˚C above 25˚C.

)

CC

)

A

at 25˚C

Electrical Characteristics (Notes 3, 4)

Symbol Parameter Conditions Min Typ Max Units

V

IH

V

IL

V

OH

V

OL

I

IH

I

IL

I

SC

I

CC

V

I

Logical “1” Input Voltage 2.0 V
Logical “0” Input Voltage 0.8 V
Logical “1” Output Voltage VIN= 0.8V I

Logical “0” Output Voltage VIN= 2.0V I

= −0.8 mA 2.4 V

OUT

I

= 40 mA 1.8 3.3 V

OUT

= 32 mA 0.2 0.4 V

OUT

I

= 40 mA 0.22 0.5 V

OUT

Logical “1” Input Current VIN= 2.4V 120 µA

V

= 5.5V 2 mA

IN

Logical “0” Input Current VIN= 0.4V −4.8 mA
Output Short Circuit Current VCC= 5.0V, TA= 125˚C, (Note 5) −40 −100 −120 mA
Supply Current VIN= 5.0V, (Each Driver) 11 18 mA
Input Clamp VCC= Min, IIN= − 12 mA −1.0 −1.5 V

Switching Characteristics

TA= 25˚C, VCC= 5V, unless otherwise noted

Symbol Parameter Conditions Min Typ Max Units

t

pd1

t

pd0

t

pd1

t

pd0

t

1

t

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. Typical values are for T
= 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.

Propagation Delay AND Gate RL= 400Ω,CL= 15 pF 8 12 ns

(

Figure 1

)1118ns

Propagation Delay NAND Gate RL= 400Ω,CL= 15 pF 8 12 ns

(

Figure 1

)58ns

Differential Delay Load, 100Ω and 5000 pF, 12 16 ns

(

Figure 2

)

Differential Delay Load, 100Ω and 5000 pF, 12 16 ns

(

Figure 2

)

= 25˚C and V

A

CC

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AC Test Circuit and Switching Time Waveforms

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f=1MHz

≤10 ns (10% to 90%)

t

r=tf

Duty cycle = 50%

FIGURE 1.

DS7830

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FIGURE 2.

Typical Performance Characteristics

Output High Voltage
(Logical “1”)
vs Ouput Current

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Differential Delay vs
Temperature

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Threshold Voltage
vs Temperature

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Typical Performance Characteristics (Continued)

DS7830

Differential Output Voltage
(|V

AND-VNAND

|)vs

Differential Output Current

Power Dissipation (No Load)
vs Data Input Frequency

Output Low Voltage
(Logical “0“) vs
Output Current

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Typical Application

†

Exact value depends on line length.

*Optional to control response time.

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Digital Data Transmission

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DS005799-3

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Schematic Diagram

DS7830

*2 Per Package

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Physical Dimensions inches (millimeters) unless otherwise noted

DS7830 Dual Differential Line Driver

Ceramic Dual-In-Line Package (J)

Order Number DS7830J

NS Package Number J14A

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accordance with instructions for use provided in the

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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.

labeling, can be reasonably expected to result in a
significant injury to the user.

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