Datasheet

+5V-Powered, Multichannel RS-232
Drivers/Receivers
GND
8
3
R2OUT
22
23
R3OUT
R2IN
R3IN
5kΩ
5kΩ
6
7
R1OUT
R1IN
5kΩ
RS-232
OUTPUTS
TTL/CMOS
INPUTS
RS-232
INPUTS
TTL/CMOS
OUTPUTS
R1
R2
R3
17
16
R4OUT
R4IN
5kΩ
R4
2
5
T1IN
T1OUT
+5V
400kΩ
+5V
18
1
T2IN
T2OUT
T2
400kΩ
19
T3OUT
24
T3IN
+5V
T3
400kΩ
11
C1+
C1-
1.0μF
10
12
13
14
15
+5V INPUT
C2+
C2-
V
CC
+5V TO +10V
VOLTAGE DOUBLER
9
1.0μF
1.0μF
+10V TO -10V
VOLTAGE INVERTER
4
1.0μF
1.0μF
21
20
T4IN
T4OUT
+5V
T4
400kΩ
T1
24
23
22
21
20
19
18
17
1
2
3
4
5
6
7
8
T3OUT
R3IN
R3OUT
T4INR2OUT
R2IN
T1OUT
T2OUT
TOP VIEW
T3IN
T2IN
R4OUTGND
R1IN
R1OUT
T1IN
16
15
14
13
9
10
11
12
R4IN
V-
C2-
C2+C1-
V+
C1+
V
CC
DIP/SO
MAX238
T4OUT
+
V+
V-
Figure 16. MAX238 Pin Configuration and Typical Operating Circuit
Maxim Integrated
25
MAX220–MAX249
MAX220–MAX249