MAX3223

3V TO 5.5V MULTICHANNEL RS232 LINE DRIVER/RECEIVER

WITH ±15kV ESD PROTECTION

SLLS409K − JANUARY 2000 − REVISED MARCH 2004

10

POST OFFICE BOX 655303

APPLICATION INFORMATION

15

14

8

1

2

3

4

7

DIN1

FORCEOFF

FORCEON

13

DOUT1

20

17

16

19

18

ROUT1

5

6

+

−

C3

VCC

C2+

C1

C2

C1+

GND

V−

C1−

RIN1

C2−

+

−

CBYPASS

V+

+

−

+

−

DOUT2

VCC

C1

C2, C3, C4

3.3 V

± 0.3 V

5 V

± 0.5 V

3 V to 5.5 V

0.1

µF

0.047

µF

0.1

µF

0.1

µF

0.33

µF

0.47

µF

VCC vs CAPACITOR VALUES

EN

C4

+

−

9

10

Auto-

powerdown

12

11

DIN2

INVALID

RIN2

ROUT2

† 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.

†

= 0.1

µF

5 k

Ω

5 k

Ω

Figure 6. Typical Operating Circuit and Capacitor Values