ST3222E

Pin configuration

3/18

1

Pin configuration

Figure 1.

Pin connection

SO-18

SSOP20/TSSOP20

Table 1.

Pin description

Pin n°

SO-18

Pin n°

SSOP/TSSOP20

Symbol

Name and function

11

EN

Receiver enable control. drive low for normal operation. Drive high to

force the receivers outputs (R_OUT) into a high-impedance state.

22

Positive terminal for the first charge pump capacitor

3

3

V+

5.5V Generated by the charge pump.

44

Negative terminal for the first charge pump capacitor

55

Positive terminal for the second charge pump capacitor

66

Negative terminal for the second charge pump capacitor

7

7

V-

-5.5V Generated by the charge pump.

88

Second transmitter output voltage

99

Second receiver input voltage

10

10

Second receiver output voltage

11

NC

Not connected

11

12

Second transmitter input voltage

12

13

First transmitter input voltage

14

NC

Not connected

13

15

First receiver output voltage

14

16

First receiver input voltage

15

17

First transmitter output voltage