MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
TOP VIEW
+5V INPUT
1.0μF
9
1.0μF
1.0μF
10
11
15
C1+
V
CC
V+
V-
+5V TO +10V
VOLTAGE DOUBLER
1.0μF
1.0μF
12
13
C1-
C2+
+10V TO -10V
VOLTAGE INVERTER
14
C2-
+5V
400kΩ
T1OUT
T1IN
7
2
T1
+
T3OUT
T1OUT
T2OUT
R1IN
1
2
3
4
5
6
7
8
9
24 T4OUT
23 R2IN
22 R2OUT
21 SHDN
20 EN
+5V
+5V
+5V
400kΩ
T2OUT
T3OUT
T2IN
T3IN
6
3
1
T2
TTL/CMOS
INPUTS
RS-232
OUTPUTS
400kΩ
MAX236
R1OUT
T2IN
18
T3
19 T4IN
18 T3IN
17 R3OUT
16 R3IN
15 V-
T1IN
400kΩ
GND
T4OUT 24
19 T4IN
T4
V
CC
C1+ 10
V+ 11
14 C2-
R1IN
4
5
R1OUT
R1
C1- 12
13 C2+
5kΩ
DIP/SO
22
23
R2OUT
R2IN
5kΩ
RS-232
INPUTS
TTL/CMOS
OUTPUTS
R2
R3
R3OUT
EN
R3IN 16
5kΩ
SHDN
17
20
21
GND
8
ꢁigure ±4. MAX236 Pin Configuration and Typical Operating Circuit
Maxim Integrated
23
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
