ADM485

REV. A

–3–

ABSOLUTE MAXIMUM RATINGS*

°C unless otherwise noted)

Inputs

Receiver Inputs (A, B) . . . . . . . . . . . . . . . . . –14 V to +14 V

Outputs

Driver Outputs . . . . . . . . . . . . . . . . . . . . . . . –14 V to +14 V

Power Dissipation 8-Pin DIP . . . . . . . . . . . . . . . . . . . 500 mW

Power Dissipation 8-Pin SOIC . . . . . . . . . . . . . . . . . 450 mW

θ

. . . . . . . . . . . . . . . . . .

+170

°C/W

Power Dissipation 8-Pin Cerdip . . . . . . . . . . . . . . . . 500 mW

Operating Temperature Range

Commercial (J Version) . . . . . . . . . . . . . . . . . 0

°C to +70°C

Industrial (A Version) . . . . . . . . . . . . . . . . –40

°C to +85°C

Storage Temperature Range . . . . . . . . . . . –65

°C to +150°C

Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . +300

°C

Vapour Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . +215

°C

Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . +220

°C

*Stresses above those listed under Absolute Maximum Ratings may cause perma-

nent damage to the device. This is a stress rating only; functional operation of the

device at these or any other conditions above those indicated in the operational

sections of this specification is not implied. Exposure to absolute maximum ratings

for extended periods may affect device reliability.

Table I. Transmitting

INPUTS

OUTPUT

RE

DE

DI

B

A

X

1101

X

1010

X0

X

Z

Z

Table II. Receiving

INPUTS

OUTPUT

RE

DE

A-B

RO

00

≥ +0.2 V

1

00

≤ –0.2 V

0

0

0

Inputs Open

1

10

X

Z

PIN FUNCTION DESCRIPTION

Pin Mnemonic Function

1

RO

Receiver Output. When enabled if A > B by

200 mV, then RO = High. If A < B by

200 mV, then RO = Low.

2

RE

Receiver Output Enable. A low level enables

the receiver output, RO. A high level places it

in a high impedance state.

3

DE

Driver Output Enable. A high level enables

the driver differential outputs, A and B. A

low level places it in a high impedance state.

4

DI

Driver Input. When the driver is enabled a

logic Low on DI forces A low and B high

while a logic High on DI forces A high and B

low.

5

GND

Ground Connection, 0 V.

6

A

Noninverting Receiver Input A/Driver

Output A.

7

B

Inverting Receiver Input B/Driver Output B.

Power Supply, 5 V

± 5%.

PIN CONFIGURATION

RO

RE

DE

DI

GND

A

B

V

CC

1

2

3

4

8

7

6

5

TOP VIEW

(Not to Scale)

ADM485

ORDERING GUIDE

Model

Temperature Range

Package Option

ADM485JN

0

°C to +70°C

N-8

ADM485JR

0

°C to +70°C

SO-8

ADM485AN

–40

°C to +85°C

N-8

ADM485AR

–40

°C to +85°C

SO-8

ADM485AQ

–40

°C to +85°C

Q-8

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily

accumulate on the human body and test equipment and can discharge without detection. Although

the ADM485 features proprietary ESD protection circuitry, permanent damage may occur on

devices subjected to high-energy electrostatic discharges. Therefore, proper ESD precautions are

recommended to avoid performance degradation or loss of functionality.

WARNING!

ESD SENSITIVE DEVICE