If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

Storage Temperature Range

Molded DIP

−65˚C to +150˚C

Lead Temperature

Molded DIP (soldering, 10

sec.)

265˚C

Maximum Power Dissipation (Note 1) at 25˚C

N-Molded Package

1.84W

Supply Voltage

7V

Input Voltage, A or B Inputs

Differential Input Voltage

Enable Input Voltage

7V

Low Level Output Current

50 mA

Recommended Operating

Conditions

Min

Typ

Max

Units

Supply Voltage (V

4.75

5

5.25

V

Common Mode Input

−7

+12

V

Voltage (V

Differential Input

−7

+12

V

Voltage (V

Output Current High (I

−400

µA

Output Current LOW (I

mA

Operating Temperature (T

0

25

70

˚C

Note 1: Derate molded DIP package 15 mW/˚C above 25˚C.

over recommended temperature, common mode input voltage, and supply voltage ranges, unless otherwise specified

Symbol

Parameter

Conditions

Min

Typ

Max

Units

V

TH

Differential Input

V

0.2

V

High Threshold Voltage

V

TL

Differential Input (Note 5)

V

−0.2

V

Low Threshold Voltage

V

Hysteresis (Note 6)

V

50

mV

V

IH

Enable Input Voltage HIGH

2.0

V

V

IL

Enable Input Voltage LOW

0.8

V

V

IC

Enable Input Clamp Voltage

I

−1.5

V

V

OH

Output Voltage HIGH

V

2.7

V

V

OL

Output Voltage LOW

V

I

0.45

V

I

0.50

I

OZ

High Impedance State Output

V

µA

I

I

Line Input Current (Note 7)

Other Input = 0V

V

1.0

mA

V

−0.8

I

IH

Enable Input Current HIGH

V

20

µA

I

IL

Enable Input Current LOW

V

−100

µA

R

I

Input Resistance

12

k

Ω

I

OS

Short Circuit Output Current

(Note 8)

−15

−85

mA

I

CC

Supply Current

Outputs Disabled

75

mA

Note 2: “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” provide conditions for actual device operation.

Note 4: All currents into the device pins are positive; all currents out of the device pins are negative. All voltages are reference to ground unless otherwise specified.

Note 5: The algebraic convention, when the less positive (more negative) limit is designated minimum, is used in this data sheet for common mode input voltage

and threshold voltage levels only.

Note 7: Refer to EIA Standards RS-485 for exact conditions.

Note 8: Only one output at a time should be shorted.

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