6

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±15kV ESD-Protected, +5V RS-232 Transceivers

MAX203E

MAX205E

_____________________________________________________________Pin Descriptions

MAX202E/MAX232E

15

10, 11

9, 12

8, 13

Ground

19

RS-232 Driver Inputs

13, 14

7, 14

6

4, 5

RS-232 Receiver Outputs

12, 15

RS-232 Receiver Outputs

10, 17

RS-232 Driver Outputs

9, 18

8

2

1, 3

Terminals for negative charge-pump capacitor

5, 7

3

+4.5V to +5.5V Supply-Voltage Input

Terminals for positive charge-pump capacitor

2, 4

20

16

GND

T_IN

R_OUT

R_IN

T_OUT

V-

C2+, C2-

V+

C1+, C1-

N.C.

No Connect—not internally connected.

1, 6, 11, 16

__

FUNCTION

NAME

PIN

DIP/SO/TSSOP

LCC

11, 15

12, 15

Connect pins together.

C2+

NAME

14

8

V+

SO

C1-

T_IN

R_OUT

R_IN

T_OUT

GND

C1+

C2-

V-

13

FUNCTION

14

1, 2

RS-232 Driver Inputs

Make no connection to this pin.

3, 20

RS-232 Receiver Outputs

4, 19

RS-232 Receiver Inputs

1, 2

3, 20

5, 18

RS-232 Transmitter Outputs

6, 9

Ground

7

+4.5V to +5.5V Supply-Voltage Input

13

Make no connection to this pin.

4,19

5,18

6, 9

11, 16

Connect pins together.

10, 17

7

8

10, 16

12, 17

DIP

PIN

NAME

FUNCTION

T_OUT

RS-232 Driver Outputs

R_IN

RS-232 Receiver Inputs

R_OUT

TTL/CMOS Receiver Outputs. All receivers are inactive in shutdown.

PIN

1–4, 19

5, 10, 13, 18, 24

T_IN

GND

Ground

+4.75V to +5.25V Supply Voltage

EN

Receiver Enable—active low

6, 9, 14, 17, 23

7, 8, 15, 16, 22

11

12

20

SHDN

Shutdown Control—active high

21