MAX207

5V MULTICHANNEL RS232 LINE DRIVER/RECEIVER

WITH ±15kV ESD PROTECTION

SLLS592B − OCTOBER 2003 − REVISED JANUARY 2004

7

POST OFFICE BOX 655303

APPLICATION INFORMATION

DOUT3

1

+

−

400 k

Ω

5 V

18

DIN3

400 k

Ω

5 V

19

400 k

Ω

5 V

21

DOUT5

20

5 k

Ω

23

ROUT2

22

RIN2

24

DOUT4

5 k

Ω

16

ROUT3

17

RIN3

15

+

−

C4 =

0.1

µF

16 V

14

13

+

−

C2 =

0.1

µF

16 V

C2−

C2+

DOUT1

2

400 k

Ω

5 V

DIN1

7

400 k

Ω

5 V

DIN2

6

DOUT2

3

RIN1

4

5 k

Ω

ROUT1

5

C1 =

0.1

µF

6.3 V

12

11

V+

10

+

−

=

0.1

µF

6.3 V

9

VCC

+

−

GND

8

DIN4

DIN5

C1+

C1−

V−

† 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.

CBYPASS

= 0.1

µF

C3 †

Figure 4. Typical Operating Circuit and Capacitor Values