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40Mbps, +3.3V, RS-485 Half-Duplex

Transceivers

Function Table

X = Don’t care.

Note: Shutdown mode, driver, and receiver outputs are in high impedance.

Functional Diagram

RO

DI

A

B

DE

GND

R

D

RE

SHUTDOWN

MAX14840E

MAX14841E

TRANSMITTING

INPUTS

OUTPUTS

RE

DE

DI

B

A

X

1

1

0

1

X

1

0

1

0

0

0

X

High Impedance

High Impedance

1

0

X

Shutdown (see note)

RECEIVING (MAX14840E)

INPUTS

OUTPUTS

RE

DE

A-B

RO

0

X

R

200mV

1

0

X

P

-200mV

0

0

X

Open/Shorted

Previous State

1

1

X

High Impedance

1

0

X

Shutdown (see note)

RECEIVING (MAX14841E)

INPUTS

OUTPUTS

RE

DE

A-B

RO

0

X

R

-10mV

1

0

X

P

-200mV

0

0

X

Open/Shorted

1

1

1

X

High Impedance

1

0

X

Shutdown (see note)