|
SP3223B Datasheet, PDF (14/24 Pages) Sipex Corporation – Intelligent +3.0V to +5.5V RS-232 Transceivers | |||
|
◁ |
VCC = +5V
+
C1 â
â5V
+5V
+
C2 â
â5V
C4
+ â VDD Storage Capacitor
â + VSS Storage Capacitor
C3
Figure 21. Charge Pump â Phase 1
VCC = +5V
+
C1 â
Figure 22. Charge Pump â Phase 2
a) C2+
1
2
2
+
C2 â
â10V
C4
+ â VDD Storage Capacitor
â + VSS Storage Capacitor
C3
[
T
]
+6V
T
0V
0V
b) C2-
T
-6V
Ch1 2.00V Ch2 2.00V M 1.00µs Ch1 1.96V
Figure 23. Charge Pump Waveforms
VCC = +5V
+
C1 â
â5V
+5V
+
C2 â
â5V
C4
+ â VDD Storage Capacitor
â + VSS Storage Capacitor
C3
Figure 24. Charge Pump â Phase 3
VCC = +5V
+
C1 â
+10V
+
C2 â
C4
+ â VDD Storage Capacitor
â + VSS Storage Capacitor
C3
Figure 25. Charge Pump â Phase 4
Rev. 6/30/03
SP3223B/3243B +3.0V to +5.5V RS-232 Transceivers
14
© Copyright 2003 Sipex Corporation
|
▷ |