SP3203E Datasheet, PDF (11/16 Pages) Sipex Corporation – 3V RS-232 Serial Transceiver with Logic Selector and15kV ESD Protection

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 12. Charge Pump Waveforms
V_CC = +5V
+
C_{1 –}
–5V
+5V
+
C_{2 –}
–5V
C₄
+ – _{VDD Storage Capacitor}
– + _{VSS Storage Capacitor}
C₃
Figure 13. Charge Pump — Phase 4 - V_SS Charge Storage
V_CC = +5V
+
C_{1 –}
+
C_{2 –}
–10V
Figure 14. Charge Pump — Phase 3 - V_SS Charge Transfer
V_CC = +5V
+
C_{1 –}
–5V
+5V
+
C_{2 –}
–5V
C₄
+ – _{VDD Storage Capacitor}
– + _{VSS Storage Capacitor}
C₃
C₄
+ – _{VDD Storage Capacitor}
– + _{VSS Storage Capacitor}
C₃
Figure 15. Charge Pump — Phase 2 - V_DD Charge Storage
V_CC = +5V
+
C_{1 –}
+10V
+
C_{2 –}
Figure 16. Charge Pump — Phase 1 - V_DD Charge Transfer
Rev. 2/7/01
SP3203E
11
C₄
+ – _{VDD Storage Capacitor}
– + _{VSS Storage Capacitor}
C₃
© Copyright 2001 Sipex Corporation