Datasheet

Figure 18. MAX240 Pin Configuration and Typical Operating Circuit
GND
18
4R3OUT
40
R4OUT
R3IN
R4IN
5kΩ
5kΩ
13
10
R2OUT
R2IN
5kΩ
RS-232
INPUTS
TTL/CMOS
OUTPUTS
RS-232
OUTPUTS
TTL/CMOS
INPUTS
R2
16
17
R1OUT
R1IN
5kΩ
R1
R3
R4
36
35
R5OUT R5IN
5kΩ
R5
7
15
T1IN
T1OUT
+5V
400kΩ
+5V
14
8
T2IN
T2OUT
T2
400kΩ
37
T3OUT
6
T3IN
+5V
T3
400kΩ
C1+
C1-
1.0µF
25
V
CC
+5V INPUT
19
30
1.0µF
26
1.0µF
+5V TO +10V
VOLTAGE DOUBLER
3
1.0µF
T1
+5V
2
41
T5IN
T5OUT
T5
400kΩ
5
38
T4IN
T4OUT
+5V
400kΩ
T4
27
C2+
C2-
28
1.0µF
29
+5V TO -10V
VOLTAGE INVERTER
V+
39
EN
42
43
Plastic FP
MAX240
SHDN
EN
T5OUT
R4IN
R4OUT
R5OUT
R5IN
N.C.
N.C.
T3IN
T4IN
R2OUT
T2IN
T1IN
R1OUT
R1IN
N.C.
N.C.
N.C.
N.C.
V
CC
GND
R2IN N.C. T4OUT T2OUT T1OUT T3OUT N.C. R3IN R3OUT N.C. T5IN
N.C.
C1+
C2
V+
C1-
C2+
N.C.
V-
N.C. N.C. N.C.
33
32 31 30 29 28 27 26 25 24 23
34
35
36
37
38
39
40
41
42
43
44
1 2 3 4 5 6 7 8 9 10 11
22
21
20
19
18
17
16
15
14
13
12
SHDN
TOP VIEW
V-
+
MAX220–MAX249 +5V-Powered, Multichannel
RS-232 Drivers/Receivers
www.maximintegrated.com
Maxim Integrated │ 27