Datasheet

MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
22 ______________________________________________________________________________________
1.0
μ
F
+5V INPUT
GND
11
6
23
5
R2
OUT
RS-232
INPUTS
TTL/CMOS
OUTPUTS
14
13
21
R5
OUT
5k
Ω
17
18
R4
OUT
5k
Ω
24
R3
OUT
5k
Ω
24
23
22
21
20
19
18
17
1
2
3
4
5
6
7
8
R3
IN
R3
OUT
T5
IN
SHDNT2
OUT
T1
OUT
T3
OUT
T4
OUT
EN
T5
OUT
R4
IN
R4
OUT
T1
IN
T2
IN
R2
OUT
R2
IN
16
15
14
13
9
10
11
12
T4
IN
T3
IN
R5
OUT
R5
IN
V
CC
GND
R1
IN
R1
OUT
DIP
MAX235
5k
Ω
910
R1
OUT
R1
IN
R2
IN
R3
IN
R4
IN
R5
IN
5k
Ω
7
15
3
4
T2
IN
T3
OUT
RS-232
OUTPUTS
TTL/CMOS
INPUTS
22
19T5
IN
T5
OUT
+5V
16
1T4
IN
T4
OUT
+5V
2
T3
IN
+5V
+5V
8
T1
IN
T1
OUT
+5V
T2
OUT
T1
T1
R2
R3
R4
R5
T2
T3
T5
T4
400k
Ω
400k
Ω
400k
Ω
400k
Ω
400k
Ω
SHDN
EN
20
12
V
CC
TOP VIEW
Figure 13. MAX235 Pin Configuration and Typical Operating Circuit