+5V INPUT
µF 6.3V
+5V INPUT
µF 6.3V
10
+
10
+
+
+
17
17
0.1
16V
µF
2
0.1 µF
16V
+
2
V
C
C
C
C
V
CC
+
+
C
C
C
C
1
3
7
CC
0.1
6.3V
µ
F
+
+
+
1
3
7
V+
V-
0.1
6.3V
µF
+5V to +10V
Voltage Doubler
*
V+
V-
+5V to +10V
Voltage Doubler
*
4
5
-
1
4
5
-
1
+
-
2
+
0.1µF
16V
+
-
0.1
16V
µ
F
+10V to -10V
Voltage Inverter
2
+
0.1
16V
µ
F
+10V to -10V
Voltage Inverter
0.1 µF
16V
6
2
6
2
400k Ω
400k Ω
400k Ω
12
11
15
8
T
T
IN
T
T
OUT
OUT
T
1
1
1
2
12
15
T
T
IN
T
OUT
T
1
1
1
400k
Ω
IN
T
2
2
11
13
8
IN
T
OUT
IN
T
2
2
1
2
14
R
R
OUT
OUT
R
R
1
14
13
1
2
R
R
OUT
R
R
IN
IN
R
1
2
1
2
1
5kΩ
5kΩ
5kΩ
5kΩ
10
9
9
R
IN
10
1
R
2
2
OUT
EN
R
2
18
18
ON/OFF
SHUTDOWN
SP312A
SP310A
GND 16
GND 16
*The negative terminal of the V+ storage capacitor can be tied
to either VCC or GND. Connecting the capacitor to VCC (+5V)
is recommended.
*The negative terminal of the V+ storage capacitor can be tied
to either VCC or GND. Connecting the capacitor to VCC (+5V)
is recommended.
Figure 5. Typical Circuits using the SP310A and SP312A
SP231ADS/01
SP231A Enhanced RS-232 Line Drivers/Receivers
© Copyright 2000 Sipex Corporation
7
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