MAX222

5V DUAL RS232 LINE DRIVER/RECEIVER

WITH ±15kV ESD PROTECTION

SLLS590D − SEPTEMBER 2003 − REVISED AUGUST 2004

7

POST OFFICE BOX 655303

APPLICATION INFORMATION

12

11

9

2

3

4

5

8

ROUT2

DIN2

10

RIN1

17

14

13

16

15

DIN1

6

7

+

−

C3

VCC

C2+

C1

C2

C1+

GND

C1−

ROUT1

C2−

+

−

CBYPASS

= 0.1

µF

V+

+

−

+

−

RIN2

C4

+

−

DOUT1

DOUT2

† C3 can be connected to VCC or GND.

NOTES: A. Resistor values shown are nominal.

B. Nonpolarized ceramic capacitors are acceptable. If polarized tantalum or electrolytic capacitors are used, they should be

connected as shown.

†

V−

0.1

µF,

6.3 V

0.1

µF,

6.3 V

0.1

µF,

6 V

5 k

Ω

5 k

Ω

18

SHDN

1

NC

Figure 4. Typical Operating Circuit and Capacitor Values