REV.

ADM1485

–3–

ABSOLUTE MAXIMUM RATINGS

*

°C, unless otherwise noted.)

Inputs

Control Inputs (DE,

RE) . . . . . . . . . .–0.3 V to V

Receiver Inputs (A, B) . . . . . . . . . . . . . . . . . . –9 V to +14 V

Outputs

Driver Outputs (A, B) . . . . . . . . . . . . . . . . . . –9 V to +14 V

Power Dissipation 8-Lead MSOP . . . . . . . . . . . . . . . 900 mW

θ

. . . . . . . . . . . . . . . . . . . 206

°C/W

Power Dissipation 8-Lead PDIP . . . . . . . . . . . . . . . . 500 mW

Power Dissipation 8-Lead SOIC . . . . . . . . . . . . . . . . 450 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

Vapor 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 listed in the operational

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

for extended periods of time may affect device reliability.

PIN FUNCTION DESCRIPTIONS

Pin Mnemonic

Function

No.

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

TOP VIEW

(Not to Scale)

8

7

6

5

1

2

3

4

RO

RE

DE

B

A

GND

DI

ADM1485

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

ADM1485 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.

Table I. Transmitting

Inputs

Outputs

DE

DI

B

A

11

0

1

10

1

0

0X

Z

Z

Table II. Receiving

Inputs

Outputs

RE

A-B

RO

0

≥ +0.2 V

1

0

≤ –0.2 V

0

0

Inputs Open

1

1X

Z