NAD T747 - Page 40

IC157: ST232CDR: RS-232 DRIVERS & RECEIVERS
PlN N° SYMBOL NOTE
1C
1
+ Positive terminal for the first charge pump capacitor
2 V+ Doubled voltage terminal
3C
1
- Negative terminal for the first charge pump capacitor
4C
2
+ Positive terminal for the second charge pump capacitor
5C
2
- Negative terminal for the second charge pump capacitor
6 V- Inverted voltage terminal
7T2
OUT
Second transmitter output voltage
8R2
IN
Second receiver input voltage
9R2
OUT
Second receiver output voltage
10 T2
IN
Second transmitter input voltage
11 T1
IN
First transmitter input voltage
12 R1
OUT
First receiver output voltage
13 R1
IN
First receiver input voltage
14 T1
OUT
First transmitter output voltage
15 GND Ground
16 V
CC
Supply voltage
2-27