Fail-Safe, High-Speed (10Mbps),

Slew-Rate-Limited RS-485/RS-422 Transceivers

12

______________________________________________________________________________________

Function Tables (continued)

TRANSMITTING

INPUTS

OUTPUTS

RE

DE

DI

B/Z

A/Y

X

1

1

0

1

X

1

0

1

0

0

0

X

High-Z

High-Z

1

0

X

Shutdown

RECEIVING

INPUTS

OUTPUT

RE

DE

A-B

RO

0

X

≥ -0.05V

1

0

X

≤ -0.2V

0

0

X

Open/shorted

1

1

1

X

High-Z

1

0

X

Shutdown

MAX3089

TRANSMITTING

INPUTS

OUTPUTS

TXP

RE

DE

DI

Z

Y

0

X

1

1

0

1

0

X

1

0

1

0

1

X

1

1

1

0

1

X

1

0

0

1

X

0

0

X

High-Z

High-Z

X

1

0

X

Shutdown

INPUTS

OUTPUT

H/F

RXP

RE

DE

A-B

Y-Z

RO

0

0

0

X

≥ -0.05V

X

1

0

0

0

X

≤ -0.2V

X

0

0

1

0

X

≥ -0.05V

X

0

0

1

0

X

≤ -0.2V

X

1

1

0

0

0

X

≥ -0.05V

1

1

0

0

0

X

≤ -0.2V

0

1

1

0

0

X

≥ -0.05V

0

1

1

0

0

X

≤ -0.2V

1

0

0

0

X

Open/

shorted

X

1

1

0

0

0

X

Open/

shorted

1

0

1

0

X

Open/

shorted

X

0

1

1

0

0

X

Open/

shorted

0

X

X

1

1

X

X

High-Z

X

X

1

0

X

X

Shutdown

RECEIVING

X = Don’t care

Shutdown mode, driver and receiver outputs high impedance

MAX3082/MAX3085/MAX3088