±15kV ESD-Protected, 3.3V Quad

RS-422 Transmitters

6

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Pin Description

ENABLE RESPONSE TIME

MAX3030E toc13

20ns/div

ENABLE

1V/div

DIFFERENTIAL

OUTPUT

2V/div

MAX3033E EYE DIAGRAM

MAX3030E toc14

100ns/div

DO_+

1V/div

DO_-

1V/div

Typical Operating Characteristics (continued)

PIN

MAX3030E/

MAX3031E

MAX3032E/

MAX3033E

NAME

FUNCTION

1, 7, 9, 15

1, 7, 9, 15

DI1, DI2,

DI3, DI4

Transmitter Inputs. When the corresponding transmitter is enabled, a low on DI_ forces

the noninverting output low and inverting output high. Similarly, a high on DI_ forces

noninverting output high and inverting output low.

2, 6, 10, 14

2, 6, 10, 14

DO1+, DO2+,

DO3+, DO4+

Noninverting RS-422 Outputs

3, 5, 11, 13

3, 5, 11, 13

DO1-, DO2-,

DO3-, DO4-

Inverting RS-422 Outputs

4

—

EN

Transmitter Enable Input: Active HIGH. Drive EN HIGH to enable all transmitters. When

EN is HIGH, drive EN LOW to disable (three-state) all the transmitters. The transmitter

outputs are high impedance when disabled. EN is hot-swap protected (see the Hot

Swap section).

8

8

GND

Ground

12

—

EN

Transmitter Enable Input: Active LOW. Drive EN LOW to enable all transmitters. When

EN is LOW, drive EN HIGH to disable all the transmitters. The transmitter outputs are

high impedance when disabled. EN is hot-swap protected (see the Hot Swap section).

—

4

EN1&2

Transmitter Enable Input for Channels 1 and 2. Drive EN1&2 HIGH to enable the

corresponding transmitters. Drive EN1&2 LOW to disable the corresponding

transmitters. The transmitter outputs are high impedance when disabled. EN1&2 is hot-

swap protected (see the Hot Swap section).

—

12

EN3&4

Transmitter Enable Input for Channels 3 and 4. Drive EN3&4 HIGH to enable the

corresponding transmitters. Drive EN3&4 LOW to disable the corresponding

transmitters. The transmitter outputs are high impedance when disabled. EN3&4 is hot-

swap protected (see the Hot Swap section).

16

16

Positive Supply; +3V