Datasheet

MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
26 ______________________________________________________________________________________
GND
3
18
R3
OUT
12
R4
OUT
R3
IN
R4
IN
5kΩ
5kΩ
22
21
R2
OUT
R2
IN
5kΩ
RS-232
OUTPUTS
TTL/CMOS
INPUTS
RS-232
INPUTS
TTL/CMOS
OUTPUTS
R2
1
2
R1
OUT
R1
IN
5kΩ
R1
R3
R4
10
9
R5
OUT
R5
IN
5kΩ
R5
19
24
T1
IN
T1
OUT
+5V
400kΩ
+5V
23
20
T2
IN
T2
OUT
T2
400kΩ
16
T3
OUT
13
T3
IN
+5V
T3
400kΩ
C1+
C1-
1.0μF
6
V
CC
8
+5V INPUT
4
5
1.0μF
+10V TO -10V
VOLTAGE INVERTER
17
1.0μF
T1
24
23
22
21
20
19
18
17
1
2
3
4
5
6
7
8
T1
IN
T2
IN
R2
OUT
R2
IN
V
CC
GND
R1
IN
R1
OUT
T1
OUT
R3
IN
R3
OUT
V-
C-
C+
V+
16
15
14
13
9
10
11
12
T3
IN
N.C.
EN
T3
OUT
R4
IN
R4
OUT
R5
OUT
R5
IN
DIP/SO
MAX239
T2
OUT
7.5V TO 13.2V
INPUT
7
V+
11
EN
14
15
N.C.
V-
TOP VIEW
Figure 17. MAX239 Pin Configuration and Typical Operating Circuit