SN65C3223, SN75C3223

3V TO 5.5V MULTICHANNEL RS232 COMPATIBLE LINE DRIVER/RECEIVER

SLLS538B − JUNE 2002 − REVISED OCTOBER 2004

2

POST OFFICE BOX 655303

Function Tables

EACH DRIVER

INPUTS

OUTPUT

DIN

FORCEON

FORCEOFF

VALID RIN

RS-232 LEVEL

DOUT

DRIVER STATUS

X

X

L

X

Z

Powered off

L

H

H

X

H

Normal operation with

H

HH

X

L

Normal operation with

auto-powerdown disabled

L

L

H

Yes

H

Normal operation with

H

LH

Yes

L

Normal operation with

auto-powerdown enabled

L

L

H

No

Z

Powered off by

H

L

H

No

Z

Powered off by

auto-powerdown feature

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

EACH RECEIVER

INPUTS

OUTPUT

RIN

EN

VALID RIN

RS-232 LEVEL

OUTPUT

ROUT

L

L

X

H

H

LX

L

X

HX

Z

Open

L

No

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

Auto-powerdown

RIN1

INVALID

ROUT1

DIN1

DOUT1

RIN2

ROUT2

EN

FORCEON

FORCEOFF

13

12

20

14

1

15

10

17

8

11

16

9