Datasheet

+5V-Powered, Multichannel RS-232
Drivers/Receivers
V+
V-
2
+10V
C1+
C1-
1
3
4
5
11
10
12
9
6
14
7
13
8
T1IN
R1OUT
T2IN
R2OUT
T1OUT
R1IN
T2OUT
R2IN
+5V INPUT
C2+
C2-
-10V
RS-232
OUTPUTS
RS-232
INPUTS
TTL/CMOS
INPUTS
TTL/CMOS
OUTPUTS
GND
15
5kΩ
5kΩ
400kΩ
400kΩ
+5V
+5V
+10V TO -10V
VOLTAGE INVERTER
+5V TO +10V
VOLTAGE DOUBLER
16
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
C1+ V
CC
GND
T1OUT
R1IN
R1OUT
T1IN
T2IN
R2OUT
MAX243
DIP/SO
V+
C1-
V-
C2+
C2-
T2OUT
R2IN
0.1μF
0.1μF
0.1μF
0.1μF
0.1μF
RECEIVER INPUT
≤ -3V
OPEN
≥ +3V
R1 OUTPUT
HIGH
HIGH
LOW
R2 OUTPUT
HIGH
LOW
LOW
TOP VIEW
V
CC
+
Figure 19. MAX243 Pin Configuration and Typical Operating Circuit
28
Maxim Integrated
MAX220–MAX249
MAX220–MAX249