Datasheet

MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
______________________________________________________________________________________ 23
GND
8
23
R2
OUT
RS-232
INPUTS
TTL/CMOS
OUTPUTS
17
16
21
R3
OUT
R2
IN
R3
IN
5k
Ω
5k
Ω
5
4
R1
OUT
R1
IN
5k
Ω
RS-232
OUTPUTS
TTL/CMOS
INPUTS
R1
R2
R3
2
7
T1
IN
T1
OUT
+5V
T1
400k
Ω
6
3
T2
IN
+5V
T2
OUT
T2
400k
Ω
18
T3
OUT
1
T3
IN
+5V
T3
400k
Ω
19
24
T4
IN
T4
OUT
+5V
T4
400k
Ω
SHDN
EN
20
11
C1+
C1-
1.0
μ
F
10
12
13
14
15
+5V INPUT
C2+
C2-
V
CC
+5V TO +10V
VOLTAGE DOUBLER
9
1.0
μ
F
1.0
μ
F
+10V TO -10V
VOLTAGE INVERTER
22
24
23
22
21
20
19
18
17
1
2
3
4
5
6
7
8
T4
OUT
R2
IN
R2
OUT
SHDNR1
IN
T2
OUT
T1
OUT
T3
OUT
T4
IN
T3
IN
R3
OUT
GND
T1
IN
T2
IN
R1
OUT
16
15
14
13
9
10
11
12
R3
IN
V-
C2-
C2+C1-
V+
C1+
V
CC
DIP/SO
MAX236
EN
1.0
μ
F
1.0
μ
F
TOP VIEW
V+
V-
Figure 14. MAX236 Pin Configuration and Typical Operating Circuit