+5V-Powered, Multichannel RS-232
Drivers/Receivers
+5V INPUT
TOP VIEW
1.0µF
19
1.0µF
1.0µF
25
V
C1+
CC
26
30
V+
V-
+5V TO +10V
VOLTAGE DOUBLER
1.0µF
1.0µF
27
28
C1-
C2+
+5V TO -10V
VOLTAGE INVERTER
29
C2-
+5V
400k
T1
T1
15
7
OUT
IN
T1
+5V
400k
T2
14 T2
OUT
8
6
5
IN
T2
+5V
400k
T3
T3
T4
RS-232
OUTPUTS
37
38
OUT
TTL/CMOS
INPUTS
IN
T3
+5V
400k
T4
N.C.
R2
12
13
14
15
16
17
18
19
20
21
22
44
43
42
41
40
39
38
37
36
35
34
N.C.
SHDN
EN
OUT
IN
T4
OUT
+5V
T2
400k
IN
IN
T1
R1
T5
OUT
T5
T5
2
41
IN
OUT
R1
R4
R4
OUT
IN
T5
R1
R1
IN
OUT
IN
MAX240
GND
T4
T3
16 R1
IN 17
OUT
OUT
V
CC
IN
5k
N.C.
N.C.
N.C.
R5
R5
OUT
IN
N.C.
R2
R3
13 R2
IN
10
4
R2
5k
5k
3
R3
RS-232
INPUTS
OUT
OUT
OUT
IN
TTL/CMOS
OUTPUTS
R3
R4
R5
Plastic FP
39 R4
R4
R5
40
IN
5k
5k
R5
36
35
43
IN
42 EN
SHDN
GND
18
Figure 18. MAX240 Pin Configuration and Typical Operating Circuit
______________________________________________________________________________________ 27
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
