Datasheet

Date: 02/24/05 SP3222E, SP3232E True +3.0 to +5.0V RS-232 Transceivers © Copyright 2005 Sipex Corporation
12
V
CC
= +5V
–5V –5V
+5V
V
SS
Storage Capacitor
V
DD
Storage Capacitor
C
1
C
2
C
3
C
4
+
+
++
–
–
––
Figure 12. Charge Pump — Phase 1
Figure 13. Charge Pump — Phase 2
V
CC
= +5V
–10V
V
SS
Storage Capacitor
V
DD
Storage Capacitor
C
1
C
2
C
3
C
4
+
+
++
–
–
––
Figure 14. Charge Pump Waveforms
Figure 15. Charge Pump — Phase 3
V
CC
= +5V
–5V
+5V
–5V
V
SS
Storage Capacitor
V
DD
Storage Capacitor
C
1
C
2
C
3
C
4
+
+
++
–
–
––
V
CC
= +5V
+10V
V
SS
Storage Capacitor
V
DD
Storage Capacitor
C
1
C
2
C
3
C
4
+
+
++
–
–
––
Figure 16. Charge Pump — Phase 4
Ch1 2.00V Ch2 2.00V M 1.00µs Ch1 5.48V
2
1
T
T[]
T
+6V
a) C
2+
b) C 2 -
GND
GND
-6V