+5V-Powered, Multichannel RS-232
Drivers/Receivers
TOP VIEW
+5V INPUT
1.0µF
9
1.0µF
1.0µF
10
11
15
C1+
V
CC
V+
V-
+5V TO +10V
VOLTAGE DOUBLER
1.0µF
1.0µF
12
13
C1-
C2+
+10V TO -10V
VOLTAGE INVERTER
14
C2-
+5V
400k
T1
T1
T1
7
2
OUT
IN
T3
T1
T2
1
2
3
4
5
6
7
8
9
24 T4
23 R2
22 R2
OUT
OUT
OUT
OUT
+5V
+5V
+5V
400k
T2
IN
T2
T2
T3
OUT
6
3
1
IN
IN
IN
OUT
TTL/CMOS
INPUTS
R1
21 SHDN
20 EN
RS-232
OUTPUTS
IN
400k
T3
MAX236
R1
OUT
T3
T4
18
OUT
T2
19 T4
18 T3
IN
IN
IN
IN
T1
400k
T4
GND
17 R3
16 R3
15 V-
OUT
IN
24
4
19 T4
OUT
V
CC
C1+ 10
V+ 11
14 C2-
13 C2+
R1
5
R1
IN
OUT
OUT
OUT
R1
C1- 12
5k
5k
5k
DIP/SO
22
23
R2
R2
IN
RS-232
INPUTS
TTL/CMOS
OUTPUTS
R2
R3
R3
R3
16
21
17
20
IN
EN
SHDN
GND
8
Figure 14. MAX236 Pin Configuration and Typical Operating Circuit
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
