Absolute Maximum Ratings (Note 3)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

Supply Voltage (V

+12V

Enable Input Voltage

(RE (Note 1), DE)

−0.5V to (V

Driver Input Voltage (DI)

−0.5V to (V

Driver Output Voltage (A, B)

−14V to +14V

Receiver Input Voltage (A, B)

−14V to +14V

Receiver Output Voltage (RO)

−0.5V to (V

M Package

1.19W

Derate M Package 9.5 mW/˚C above +25˚C

M Package

0.76W

Storage Temperature Range

−65˚C to +150˚C

Lead Temperature Range

(Soldering, 4 sec.)

+260˚C

ESD (HBM)

≥2kV

Recommended Operating

Conditions

Min

Typ

Max

Units

Supply Voltage (V

+4.75 +5.0 +5.25

V

Operating Free Air

Temperature (T

DS481T

−40

+25

+85

˚C

Bus Common Mode

Voltage

−7

+12

V

Electrical Characteristics

Over Supply Voltage and Operating Temperature Ranges, unless otherwise specified (Notes 4, 5)

Symbol

Parameter

Conditions

Pin

Min

Typ Max Units

V

OD1

Differential Driver Output Voltage

(No Load)

A, B

1.5

5

V

V

OD2

Differential Driver Output Voltage

R

Ω, (RS422), Figure 1

2

2.8

V

with Load

R

Ω, (RS485), Figure 1

1.5

2.3

5

V

∆V

OD

Change in Magnitude of Output

R

Ω or 50Ω (Note 6)

0.2

|V|

Differential Voltage

V

OD3

Differential Driver Output Voltage —

R1 = 54

Ω,R2=375Ω

1.5

2.0

5

V

Full Load with Max V

CM

V

V

OC

Driver Common-Mode Output Voltage

R

Ω or 50Ω, Figure 1

03

V

∆V

OC

Change in Magnitude of Common-Mode

R

Ω or 50Ω, Figure 1

0.2

|V|

Output Voltage

(Note 6)

V

IH

Input High Voltage

DI, DE, RE

(Note 1)

2.0

V

V

IL

Input Low Voltage

0.8

V

I

IN1

Input Current

V

I

IN2

Input Current (Note 7)

DE = 0V, V

V

DS481T

A, B

0

190

500

µA

V

0

−100 −400

µA

V

TH

Receiver Differential Threshold Voltage

−7V

≤ V

CM

≤ +12V

−0.2

0.2

V

∆V

TH

Receiver Input Hysteresis

V

70

mV

V

OH

Receiver Output High Voltage

I

RO

3.5

V

V

OL

Receiver Output Low Voltage

I

0.5

V

I

OZR

TRI-STATE Output Current at Receiver

0.4V

≤ V

O

≤ 2.4V

R

IN

Receiver Input Resistance

−7V

≤ V

IN

≤ +12V

DS481T

A, B

24

k

Ω

I

CC

No-Load Supply Current (Note 8)

DE = V

CC

V

CC

200

500

µA

DE = 0V, RE (Note 1) = 0V or V

CC

200

500

µA

I

CCX

Sleep Mode Supply Current

DE = GND

V

CC

0.2

10

µA

RE (Note 1)= V

CC (Figure 14)

I

OSD1

Driver Short Circuit Current, V

−7V

≤ V

O

≤ +12V

A, B

250

mA

I

OSD2

Driver Short Circuit Current, V

−7V

≤ V

O

≤ +12V

−250

mA

I

OSR

Receiver Short Circuit Current

V

RO

7

85

mA

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