ADM3082/ADM3085/ADM3088

–11–

PRELIMINARY TECHNICAL DATA

PIN FUNCTION DESCRIPTION

Pin

Mnemonic

Description

1

R O

Receiver Output. When

RE is low and A - B

(more positive than) –50mV, RO will be high.

When

RE is low and A – B

(more negative than) –200mV, RO will be low.

2

RE

Receiver Output Enable. Take

RE low to enable RO; RO is high impedance when RE is high.

Take

RE high and DE low to enter low-power shutdown mode.

3

D E

Driver Output Enable. Take DE high to enable driver outputs. These outputs are high

impedance when DE is low. Take RE high and DE low to enter low-power shutdown mode.

4

D I

Driver Input. With DE high, a low on DI forces non-inverting output low and inverting output

high. Similarly, a high on DI forces non-inverting output high and inverting output low.

5

G N D

Ground

6

A

Non-Inverting Receiver Input and Non-Inverting Driver Output

7

B

Inverting Receiver Input and Inverting Driver Output

TRANSMITTING

INPUTS

OUTPUTS

RE

DE

DI

B/Z

A/Y

X1

1

0

1

X1

0

1

0

0

0

X

High-Z

High-Z

1

0

X

Shutdown

RECEIVING

INPUTS

OUTPUT

RE

DE

DE

DE

DE

DE

A-B

A-B

A-B

A-B

A-B

RO

RO

RO

RO

RO

0X

-0.05V

1

0X

-0.2V

0

0

X

Open/shorted

1

1

1

X

High-Z

1

0

X

Shutdown

X = Don’t care

Shutdown mode, driver and receiver outputs high impedance

DEVICE TRUTH TABLES

REV. PrA 02/02