ST3222

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PIN CONFIGURATION

PIN DESCRIPTION

PlN N° (SO-18)

PlN N° (TSSP20)

SYMBOL

NAME AND FUNCTION

1

1

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

16

18

GND

Ground

17

19

Supply Voltage

18

20

SHDN

Active Low Shutdown Control Input. Drive Low To

Shut-down Trnasmittes And Charge Pump

SO-18

TSSOP20