MAX232, MAX232I
DUAL EIA 232 DRIVERS/RECEIVERS
SLLS047L − FEBRUARY 1989 − REVISED MARCH 2004
APPLICATION INFORMATION
5V
CBYPASS =1
µF
+
−
16
1
C1
1
µF
3
4
C2
1
µF
5
11
From CMOS or TTL
10
12
To CMOS or TTL
9
0V
15
GND
† 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. In addition to the 1-µF capacitors shown, the MAX202 can operate with 0.1-µF capacitors.
VCC
C1+
C1−
C2+
C2−
14
7
13
8
VS−
VS+
6
C4
+
1
µF
C3†
2
8.5 V
−8.5 V
1
µF
EIA-232 Output
EIA-232 Output
EIA-232 Input
EIA-232 Input
Figure 4. Typical Operating Circuit
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