11

10

8

1

2

3

4

7

ROUT2

DIN2

9

RIN1

16

13

12

15

14

DIN1

5

6

+

−

C3

VCC

C2+

C1

C2

C1+

GND

C1−

ROUT1

C2−

+

−

CBYPASS

= 0.1

µF

V+

+

−

+

−

RIN2

C4

+

−

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

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−

5 k

Ω

5 k

Ω

MAX3232

SLLS410K – JANUARY 2000 – REVISED JANUARY 2015

www.ti.com

10 Applications and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

10.1 Application Information

For proper operation, add capacitors as shown in Figure 6.

10.2 Standard Application

ROUT and DIN connect to UART or general purpose logic lines. RIN and DOUT lines connect to a RS232

connector or cable.

Figure 6. Typical Operating Circuit and Capacitor Values

10

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