MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
+5V INPUT
1.0μF
TOP VIEW
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
T1IN
+5V
14 T2IN
+5V
T3IN
400kΩ
T1OUT
T2OUT
15
7
T1
400kΩ
T2
8
6
5
400kΩ
T3
T3OUT
T4OUT
RS-232
OUTPUTS
37
TTL/CMOS
INPUTS
+5V
T4IN
400kΩ
+
N.C.
R2OUT
T2IN
T1IN
R1OUT
R1IN
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
T5OUT
R4IN
R4OUT
T4IN
38
2
T4
+5V
T5IN
400kΩ
T5OUT
R1IN
41
17
T5
MAX240
GND
16 R1OUT
R1
V
T3IN
CC
5kΩ
R2IN
N.C.
N.C.
N.C.
R5OUT
R5IN
N.C.
13 R2OUT
10
4
R2
5kΩ
3
R3OUT
R3IN
5kΩ
RS-232
INPUTS
TTL/CMOS
OUTPUTS
R3
R4
R5
Plastic FP
39 R4OUT
R4IN
40
5kΩ
R5IN
R5OUT
36
35
43
5kΩ
SHDN
42 EN
GND
18
ꢁigure ±8. MAX240 Pin Configuration and Typical Operating Circuit
Maxim Integrated
27
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
