MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
TOP VIEW
+7.5V TO +13.2V
+5V INPUT
INPUT
1.0μF
4
5
V
V+
CC
6
8
C1+
C1-
V-
+10V TO -10V
1.0μF
7
1.0μF
VOLTAGE INVERTER
+5V
+5V
400kΩ
T1
T1OUT
T2OUT
T1IN
T2IN
24
23
19
20
+
R1OUT
R1IN
1
2
3
4
5
6
7
8
9
24 T1IN
23 T2IN
22 R2OUT
21 R2IN
20 T2OUT
19 T1OUT
18 R3IN
17 R3OUT
16 T3IN
15 N.C.
400kΩ
T2
TTL/CMOS
INPUTS
RS-232
OUTPUTS
GND
+5V
V
CC
400kΩ
MAX239
V+
T3OUT 13
T3IN
16
1
T3
C+
C-
V-
R1IN
2
R1OUT
R1
R2
R3
R5IN
5kΩ
R2IN
R5OUT 10
R4OUT 11
R4IN 12
14 EN
22 R2OUT
21
13 T3OUT
5kΩ
R3IN 18
5kΩ
R4IN 12
5kΩ
R5IN
DIP/SO
17
R3OUT
RS-232
INPUTS
TTL/CMOS
OUTPUTS
11 R4OUT
R4
R5
R5OUT
EN
10
14
9
5kΩ
N.C.
15
GND
3
ꢁigure ±7. MAX239 Pin Configuration and Typical Operating Circuit
26
Maxim Integrated
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
