Datasheet

+5V-Powered, Multichannel RS-232
Drivers/Receivers
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
T5IN
N.C.
SHDN
T2IN
T2OUT
T1OUT
T5OUT
T4IN
T3IN
V-
C1+
V
CC
GND
T1IN
12
11
9
10
C2-
C2+
C1-
V+
DIP/SO
MAX230
V+
V-
9
C1+
C1-
8
10
11
12
5
4
14
13
2
3
1
20
T3IN
T4IN
T2IN
T5IN
T1OUT
T2OUT
+5V INPUT
C2+
C2-
RS-232
OUTPUTS
TTL/CMOS
INPUTS
GND
6
400kΩ
+5V
400kΩ
+5V
400kΩ
+5V
400kΩ
+5V
400kΩ
+5V
+10V TO -10V
VOLTAGE INVERTER
V
CC
+5V TO +10V
VOLTAGE DOUBLER
7
1.0μF
1.0μF
1.0μF
1.0μF
19
15
16
T3OUT T4OUT
18
x
T1IN
T3OUT
T4OUT
T5OUT
17
1.0μF
T2
T3
T4
T5
N.C.
SHDN
T1
+
TOP VIEW
Figure 9. MAX230 Pin Configuration and Typical Operating Circuit
V+
V-
14
C1+
C1-
1
2
8
7
3
11
4
T2IN
T1IN
T1OUT
T2OUT
+5V INPUT
RS-232
INPUTS
TTL/CMOS
OUTPUTS
GND
12 (14)
5kΩ
5kΩ
+12V TO -12V
VOLTAGE CONVERTER
13 (15)
1.0μF
1.0μF
C2
1.0μF
400kΩ
+5V
400kΩ
+5V
6
9
10
R1IN
R2IN
R2OUT
R1OUT
5
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
V+
V
CC
GND
T1OUT
T2OUT
V-
C-
C+
MAX231
R1IN
R1OUT
T1IN
N.C.
N.C.
T2IN
R2OUT
R2IN
SO
(12)
RS-232
OUTPUTS
TTL/CMOS
INPUTS
(11)
(13)(10)
V
CC
PIN NUMBERS IN ( ) ARE FOR SO PACKAGE.
14
13
12
11
10
9
8
1
2
3
4
5
6
7
V+
V
CC
GND
T1OUTT2OUT
V-
C-
C+
MAX231
R1IN
R1OUT
T1INT2IN
R2OUT
R2IN
DIP
+7.5V TO +12V
(16)
T1
T2
R1
R2
+
+
TOP VIEW
Figure 10. MAX231 Pin Configurations and Typical Operating Circuit
20
Maxim Integrated
MAX220–MAX249
MAX220–MAX249