MAX3222

3V TO 5.5V MULTICHANNEL RS232 LINE DRIVER/RECEIVER

WITH ±15kV ESD PROTECTION

SLLS408G − JANUARY 2000 − REVISED MARCH 2004

2

POST OFFICE BOX 655303

description/ordering information (continued)

The MAX3222 can be placed in the power-down mode by setting PWRDOWN low, which draws only 1

µA from

the power supply. When the device is powered down, the receivers remain active while the drivers are placed

in the high-impedance state. Also, during power down, the onboard charge pump is disabled; V+ is lowered to

EN high.

Function Tables

EACH DRIVER

INPUTS

OUTPUT

DIN

PWRDOWN

OUTPUT

DOUT

X

L

Z

L

HH

H

H

L

H = high level, L = low level, X = irrelevant,

Z = high impedance

EACH RECEIVER

INPUTS

OUTPUT

RIN

EN

OUTPUT

ROUT

L

L

H

H

LL

X

HZ

Open

L

H

H = high level, L = low level, X = irrelevant,

Z = high impedance (off), Open = input

disconnected or connected driver off

logic diagram (positive logic)

DIN2

DOUT2

12

8

Powerdown

RIN1

16

20

15

PWRDOWN

ROUT1

DIN1

DOUT1

13

17

RIN2

9

10

ROUT2

1

EN