Datasheet

ST3222
2/9
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
C
1
+
Positive Terminal for the first Charge Pump
Capacitor
3 3 V+ 5.5V Generated By The Charge Pump.
44
C
1
-
Negative Terminal for the first Charge Pump
Capacitor
55
C
2
+
Positive Terminal for the second Charge Pump
Capacitor
66
C
2
-
Negative Terminal for the second Charge Pump
Capacitor
7 7 V- -5.5V Generated By The Charge Pump.
88
T2
OUT
Second Transmitter Output Voltage
99
R2
IN
Second Receiver Input Voltage
10 10
R2
OUT
Second Receiver Output Voltage
11 NC Not Connected
11 12
T2
IN
Second Transmitter Input Voltage
12 13
T1
IN
First Transmitter Input Voltage
14 NC Not Connected
13 15
R1
OUT
First Receiver Output Voltage
14 16
R1
IN
First Receiver Input Voltage
15 17
T1
OUT
First Transmitter Output Voltage
16 18 GND Ground
17 19
V
CC
Supply Voltage
18 20 SHDN Active Low Shutdown Control Input. Drive Low To
Shut-down Trnasmittes And Charge Pump
SO-18 TSSOP20