Datasheet

ST3222B - ST3222C Pin configuration
Doc ID 7512 Rev 7 3/13
1 Pin configuration
Figure 1. Pin connections
CS02220
Table 2. Pin descriptions
Pin n° Symbol Name and function
1EN
Receiver enable control. Drive low for normal operation. Drive high to force the receivers
outputs (R_OUT) into a high-impedance state.
2C
1
+ Positive terminal for the first charge pump capacitor
3 V+ 5.5 V Generated by the charge pump.
4C
1
- Negative terminal for the first charge pump capacitor
5C
2
+ Positive terminal for the second charge pump capacitor
6C
2
- Negative terminal for the second charge pump capacitor
7 V- -5.5 V Generated by the charge pump.
8T2
OUT
Second transmitter output voltage
9R2
IN
Second receiver Input voltage
10 R2
OUT
Second receiver output voltage
11 NC Not connected
12 T2
IN
Second transmitter input voltage
13 T1
IN
First transmitter Input voltage
14 NC Not connected
15 R1
OUT
First receiver output voltage
16 R1
IN
First receiver input voltage
17 T1
OUT
First transmitter output voltage
18 GND Ground
19 V
CC
Supply voltage
20 SHDN Active low shutdown control input. Drive low to shutdown transmitter and charge pump