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SP3223EH Datasheet, PDF (14/24 Pages) Sipex Corporation – High Speed Intelligent +3.0V to +5.5V RS-232 Transceivers | |||
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VCC = +5V
+
C1 â
â5V
+5V
+
C2 â
â5V
Figure 16. Charge Pump â Phase 1
VCC = +5V
+
C1 â
Figure 17. Charge Pump â Phase 2
+
C2 â
â10V
[
T
a) C2+
1
T
2
2
C4
+ â VDD Storage Capacitor
â + VSS Storage Capacitor
C3
C4
+ â VDD Storage Capacitor
â + VSS Storage Capacitor
C3
]
+6V
0V
0V
b) C2-
T
-6V
Ch1 2.00V Ch2 2.00V M 1.00µs Ch1 1.96V
Figure 18. Charge Pump Waveforms
VCC = +5V
+
C1 â
â5V
+5V
+
C2 â
â5V
C4
+ â VDD Storage Capacitor
â + VSS Storage Capacitor
C3
Figure 19. Charge Pump â Phase 3
VCC = +5V
+
C1 â
+10V
+
C2 â
C4
+ â VDD Storage Capacitor
â + VSS Storage Capacitor
C3
Figure 20. Charge Pump â Phase 4
SP3223EHDS/11
SP3223EH +3.0V to +5.5V RS-232 Transceivers
14
© Copyright 2000 Sipex Corporation
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