MAX3243

3V TO 5.5V MULTICHANNEL RS232 LINE DRIVER/RECEIVER

WITH ±15kV ESD (HBM) PROTECTION

SLLS350L − APRIL 1999 − REVISED MARCH 2004

3

POST OFFICE BOX 655303

EACH RECEIVER

INPUTS

OUTPUTS

RIN2

RIN1,

RIN3−RIN5

FORCEOFF

VALID RIN

RS-232 LEVEL

ROUT2B

ROUT

RECEIVER STATUS

L

X

L

X

L

Z

Powered off while

H

XL

X

H

Z

Powered off while

ROUT2B is active

L

L

H

Yes

L

H

L

HH

Yes

L

L

Normal operation with

H

LH

Yes

H

H

Normal operation with

auto-powerdown

disabled/enabled

H

HH

Yes

H

L

auto-powerdown

disabled/enabled

Open

Open

H

No

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)

DIN3

DIN2

DIN1

DOUT3

DOUT2

DOUT1

Auto-powerdown

INVALID

RIN1

RIN2

RIN3

RIN4

RIN5

FORCEOFF

FORCEON

ROUT1

ROUT2B

ROUT2

ROUT3

ROUT4

ROUT5

14

13

12

22

23

19

20

18

17

16

15

9

10

11

21

4

5

6

7

8

5 k

5 k

5 k

5 k

5 k

Ω

Ω

Ω

Ω

Ω