
Date: 8/30/05 SP3220E/EB/EU High ESD RS-232 Driver/Receiver Copyright 2005 Sipex Corporation
3
13
Dae 82205 SP3220EEBEUHghESDRS232Dve/Receve
Copyigh 2005SpexCopoaion
V
CC
=+5V
–5V
–5V
+5V
2
V
SS
SoageCapacto
V
DD
SoageCapacto
C
1
C
C
3
C
4
+
–
+
+
–
+
–
–
Figure 15. Charge Pump — Phase 1
Figure 16. Charge Pump — Phase 2
V
CC
=+5V
–10V
V
SS
SoageCapacto
V
DD
SoageCapacto
C
1
C
2
C
3
C
4
+
–
+
+
–
+
–
–
Figure 17. Charge Pump Waveforms
Figure 18. Charge Pump — Phase 3
V
CC
=+5V
–5V
+5V
2
–5V
V
SS
SoageCapacto
V
DD
SoageCapacto
C
1
C
C
3
C
4
+
–
+
+
–
+
–
–
V
CC
=+5V
+10V
C
V
SS
SoageCapacto
V
DD
SoageCapacto
C
1
2
C
3
C
4
+
–
+
+
–
+
–
–
Figure 19. Charge Pump — Phase 4
Ch1 2.00V
Ch2
2.00V M 1.00
μ
s Ch1 5.48V
2
1
T
T
[
]
T
+6V
a) C
2+
b) C
2
-
GND
GND
-6V