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MAX3238E

3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER

WITH

±15-kV ESD (HBM) PROTECTION

SLLS710A – FEBRUARY 2006 – REVISED APRIL 2006

FUNCTION TABLES

abc

INPUTS

OUTPUT

DRIVER STATUS

TIME ELAPSED SINCE LAST

DOUT

DIN

FORCEON

FORCEOFF

RIN OR DIN TRANSITION

X

X

L

X

Z

Powered off

L

H

H

X

H

Normal operation with

auto-powerdown plus disabled

H

H

H

X

L

L

L

H

<30 s

H

Normal operation with

auto-powerdown plus enabled

H

L

H

<30 s

L

L

L

H

>30 s

Z

Powered off by

auto-powerdown plus feature

H

L

H

>30 s

Z

(1)

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

INPUTS

OUTPUTS

RECEIVER STATUS

TIME ELAPSED SINCE LAST

ROUT2 AND

RIN1

RIN2–RIN3

FORCEOFF

ROUT1B

RIN OR DIN TRANSITION

ROUT3

L

X

L

X

L

Z

Powered off while

ROUT1B is active

H

X

L

X

H

Z

L

L

H

<30 s

L

H

L

H

H

<30 s

L

L

Normal operation with

H

L

H

<30 s

H

H

auto-powerdown plus

disabled/enabled

H

H

H

<30 s

H

L

Open

Open

H

<30 s

L

H

(1)

H = high level, L = low level, X = irrelevant, Z = high impedance (off), Open = input disconnected or connected driver off

3

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