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SP3238EE Datasheet, PDF (12/20 Pages) Sipex Corporation – Intelligent +3.0V to +5.5V RS-232 Transceiver | |||
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a) C2+
1
2
2
[
T
T
]
+6V
0V
0V
b) C2-
T
-6V
Ch1 2.00V Ch2 2.00V M 1.00µs Ch1 1.96V
Figure 13. Charge Pump Waveforms
Figure 14. Charge Pump â Phase 3
VCC = +5V
+
C1 â
â5V
+5V
+
C2 â
â5V
C4
+ â VDD Storage Capacitor
â + VSS Storage Capacitor
C3
VCC = +5V
+
C1 â
+10V
+
C2 â
Figure 15. Charge Pump â Phase 4
C4
+ â VDD Storage Capacitor
â + VSS Storage Capacitor
C3
Date: 02/24/05
SP3238EE Intelligent +3.0V to +5.5V RS-232 Transceiver
12
© Copyright 2005 Sipex Corporation
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