Datasheet

Figure 15. MAX237 Pin Configuration and Typical Operating Circuit
GND
8
23
R2OUT
RS-232
INPUTS
TTL/CMOS
OUTPUTS
17
16
R3OUT
R2IN
R3IN
5kΩ
5kΩ
5
4
R1OUT
R1IN
5kΩ
RS-232
OUTPUTS
TTL/CMOS
INPUTS
R1
R2
R3
2
7
T1IN
T1OUT
+5V
T1
400kΩ
6
3
T2IN
+5V
T2OUT
T2
400kΩ
18
T3OUT
1
T3IN
+5V
T3
400kΩ
21
20
T5IN
T5OUT
+5V
T5
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
22
24
23
22
21
20
19
18
17
1
2
3
4
5
6
7
8
T4OUT
R2IN
R2OUT
T5INR1IN
T2OUT
T1OUT
T3OUT
T4IN
T3IN
R3OUTGND
T1IN
T2IN
R1OUT
16
15
14
13
9
10
11
12
R3IN
V-
C2-
C2+C1-
V+
C1+
V
CC
DIP/SO
MAX237
T5OUT
1.0µF
1.0µF
19
24
T4IN
T4OUT
+5V
T4
400kΩ
V+
V-
+
TOP VIEW
MAX220–MAX249 +5V-Powered, Multichannel
RS-232 Drivers/Receivers
www.maximintegrated.com
Maxim Integrated │ 24