MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
+5V INPUT
TOP VIEW
0.1μF
0.1μF
16
1
V
CC
C1+
2
6
+10V
-10V
+5V TO +10V
VOLTAGE DOUBLER
V+
V-
0.1μF
0.1μF
3
4
C1-
C2+
+
C1+
V+
1
2
3
4
5
6
7
8
16 V
CC
+10V TO -10V
5
VOLTAGE INVERTER
C2-
15 GND
14 T1OUT
13 R1IN
12 R1OUT
11 T1IN
10 T2IN
0.1μF
+5V
C1-
400kΩ
400kΩ
C2+
C2-
MAX243
T1IN
T1OUT
11
14
+5V
V-
TTL/CMOS
INPUTS
RS-232
OUTPUTS
T2OUT
R2IN
T2IN
T2OUT
R1IN
7
10
12
9
R2OUT
DIP/SO
R1OUT
13
TTL/CMOS
OUTPUTS
RS-232
INPUTS
5kΩ
R2IN
R2OUT
8
9
RECEIVER INPUT R1 OUTPUT R2 OUTPUT
5kΩ
≤ -3V
OPEN
≥ +3V
HIGH
HIGH
LOW
HIGH
LOW
LOW
GND
15
ꢁigure ±9. MAX243 Pin Configuration and Typical Operating Circuit
28
Maxim Integrated
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
