+3.3V, ±15kV ESD-Protected, Fail-Safe,

Hot-Swap, RS-485/RS-422 Transceivers

______________________________________________________________________________________

13

MAX3070E/MAX3073E/MAX3076E

Pin Description (continued)

PIN

MAX3070E

MAX3073E

MAX3076E

MAX3071E

MAX3074E

MAX3077E

MAX3072E

MAX3075E

MAX3078E

MAX3079E

FULL-DUPLEX

DEVICES

HALF-

DUPLEX

DEVICES

FULL-

DUPLEX

MODE

HALF-

DUPLEX

MODE

NAME

FUNCTION

12

8

—

12

—

A

Noninverting Receiver Input

—

———

12

A

Receiver Input Resistors*

——

6

——

A

Noninverting Receiver Input and Noninverting Driver

Output

——

—

13

13

RXP

Receiver Phase. Connect RXP to GND or leave

unconnected for normal transmitter phase/polarity.

14

1

8

14

14

with a 0.1µF capacitor.

1, 8, 13

———

—

N.C.

No Connect. Not internally connected. Can be connected

to GND.

*MAX3079E only. In half-duplex mode, the driver outputs serve as receiver inputs. The full-duplex receiver inputs (A and B) still have a

1/8-unit load, but are not connected to the receiver.

TRANSMITTING

INPUTS

OUTPUTS

RE

DE

DI

Z

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

A, B

RO

0X

≥ -50mV

1

0X

≤ -200mV

0

0X

Open/

shorted

1

1

1

X

High-Z

1

0

X

Shutdown

MAX3071E/MAX3074E/MAX30767E

TRANSMITTING

INPUT

OUTPUTS

DI

Z

Y

101

010

RECEIVING

INPUTS

OUTPUT

A, B

RO

≥ -50mV

1

≤ -200mV

0

Open/shorted

1

Function Tables