If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

Supply Voltage

18V

Common-Mode Voltage

Differential Input Voltage

Strobe Voltage

18V

Output Sink Current

50 mA

Maximum Power Dissipation (Note 1) at 25˚C

Cavity Package

1364 mW

Molded Package

1280 mW

Storage Temperature Range

−65˚C to

+150˚C

Lead Temperature (Soldering, 4 seconds)

260˚C

Operating Conditions

Min

Max

Units

Supply Voltage (V

4.5

15

V

Temperature (T

DS78C20

−55

+125

˚C

DS88C20

0

+70

˚C

Common-Mode Voltage (V

−15

+15

V

Note 1: Derate cavity package 9.1 mW/˚C; derate molded package 10.2

mW/˚C above 25˚C.

Symbol

Parameter

Conditions

Min

Typ

Max Units

V

TH

Differential Threshold

I

−10V

≤ V

0.06

0.2

V

Voltage

V

−15V

≤ V

0.06

0.3

V

I

−10V

≤ V

−0.08

−0.2

V

−15V

≤ V

−0.08

−0.3

V

R

IN

Input Resistance

−15V

≤ V

5

k

Ω

R

T

Line Termination

Resistance

T

100

180

300

Ω

I

IND

Data Input Current

V

2

3.1

mA

(Unterminated)

V

0

−0.5

mA

V

−2

−3.1

mA

V

THB

Input Balance

I

−7V

≤ V

V

0.1

0.4

V

(Note 6)

I

−7V

≤ V

−0.1

−0.4

V

R

V

OH

Logical “1” Output Voltage

I

V

V

V

V

OL

Logical “0” Output Voltage

I

0.25

0.5

V

I

CC

Power Supply Current

15V

≤ V

V

8

15

mA

V

V

15

30

mA

(Both Receivers)

I

IN(1)

Logical “1” Strobe Input

Current

V

V

15

100

µA

I

IN(0)

Logical “0” Strobe Input

Current

V

V

−0.5

−100

µA

V

IH

Logical “1” Strobe Input

I

V

3.5

2.5

V

Voltage

V

8.0

5.0

V

V

12.5

7.5

V

V

IL

Logical “0” Strobe Input

I

V

2.5

1.5

V

Voltage

V

V

5.0

2.0

V

V

7.5

2.5

V

I

OS

Output Short-Circuit

Current

V

−5

−20

−40

mA

www.national.com

2