Datasheet

MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
______________________________________________________________________________________ 17
TOP VIEW
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
V
CC
GND
T1
OUT
R1
IN
C2+
C1-
V+
C1+
MAX220
MAX232
MAX232A
R1
OUT
T1
IN
T2
IN
R2
OUT
R2
IN
T2
OUT
V-
C2-
DIP/SO
V+
V-
2
+10V
C1+
C1
C2
1
3
4
5
11
10
12
9
6
14
7
13
8
T1
IN
R1
OUT
T2
IN
R2
OUT
T1
OUT
R1
IN
T2
OUT
R2
IN
+5V INPUT
C2+
-10V
C4
RS-232
OUTPUTS
RS-232
INPUTS
TTL/CMOS
INPUTS
TTL/CMOS
OUTPUTS
GND
15
5k
Ω
5k
Ω
400k
Ω
400k
Ω
+5V
+5V
+10V TO -10V
VOLTAGE INVERTER
+5V TO +10V
VOLTAGE DOUBLER
16
C3
C5
CAPACITANCE (μF)
DEVICE
MAX220
MAX232
MAX232A
C1
0.047
1.0
0.1
C2
0.33
1.0
0.1
C3
0.33
1.0
0.1
C4
0.33
1.0
0.1
C5
0.33
1.0
0.1
C2-
C1-
V
CC
5k
Ω
DIP/SO
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
SHDN
V
CC
GND
T1
OUT
C1-
V+
C1+
(N.C.) EN
R1
IN
R1
OUT
T1
IN
T2
IN
T2
OUT
V-
C2-
C2+
10
9
R2
OUT
R2
IN
MAX222
MAX242
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
SHDN
V
CC
GND
T1
OUT
C1-
V+
C1+
(N.C.) EN
N.C.
R1
IN
R1
OUT
N.C.
T2
OUT
V-
C2-
C2+
12
11
9
10
T1
IN
T2
IN
R2
OUT
R2
IN
MAX222
MAX242
SSOP
( ) ARE FOR MAX222 ONLY.
PIN NUMBERS IN TYPICAL OPERATING CIRCUIT ARE FOR DIP/SO PACKAGES ONLY.
V+
V-
3
+10V
C1
C2
2
4
5
6
12
11
13
7
15
8
14
9
T1
IN
R1
OUT
T2
IN
R2
OUT
T1
OUT
(EXCEPT MAX220)
(EXCEPT MAX220)
R1
IN
T2
OUT
R2
IN
+5V INPUT
C2+
-10V
C4
RS-232
OUTPUTS
RS-232
INPUTS
TTL/CMOS
INPUTS
TTL/CMOS
OUTPUTS
GND
16
5k
Ω
400k
Ω
400k
Ω
+5V
+5V
+10V TO -10V
VOLTAGE INVERTER
V
CC
+5V TO +10V
VOLTAGE DOUBLER
17
C3
C5
1
10
18
SHDN
EN
(N.C.)
ALL CAPACITORS = 0.1
μ
F
C2-
C1+
C1-
TOP VIEW
Figure 5. MAX220/MAX232/MAX232A Pin Configuration and Typical Operating Circuit
Figure 6. MAX222/MAX242 Pin Configurations and Typical Operating Circuit