Datasheet

+5V-Powered, Multichannel RS-232
Drivers/Receivers
GND
3
18
R3OUT
12
R4OUT
R3IN
R4IN
5kΩ
5kΩ
22
21
R2OUT
R2IN
5kΩ
RS-232
OUTPUTS
TTL/CMOS
INPUTS
RS-232
INPUTS
TTL/CMOS
OUTPUTS
R2
1
2
R1OUT
R1IN
5kΩ
R1
R3
R4
10
9
R5OUT R5IN
5kΩ
R5
19
24
T1IN
T1OUT
+5V
400kΩ
+5V
23
20
T2IN
T2OUT
T2
400kΩ
16
T3OUT
13
T3IN
+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
T1IN
T2IN
R2OUT
R2INV
CC
GND
R1IN
R1OUT
T1OUT
R3IN
R3OUTV-
C-
C+
V+
16
15
14
13
9
10
11
12
T3IN
N.C.
EN
T3OUTR4IN
R4OUT
R5OUT
R5IN
DIP/SO
MAX239
T2OUT
+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
26
Maxim Integrated
MAX220–MAX249
MAX220–MAX249