SP3222EU_06 Datasheet, PDF (12/20 Pages) Sipex Corporation – 3.3V, 1000 Kbps RS-232 Transceivers

V_CC = +5V
+
C_{1 –}
–5V
+5V
+
C_{2 –}
–5V
C₄
+ – _{VDD Storage Capacitor}
– + _{VSS Storage Capacitor}
C₃
Figure 15. Charge Pump — Phase 1
V_CC = +5V
+
C_{1 –}
+
C_{2 –}
–10V
C₄
+ – _{VDD Storage Capacitor}
– + _{VSS Storage Capacitor}
C₃
Figure 16. Charge Pump — Phase 2
[
T
]
+6V
a) C2+
GND 1
T
GND ²
b) C2-
T
-6V
Ch1 2.00V Ch2 2.00V M 1.00µs Ch1 5.48V
Figure 17. Charge Pump Waveforms
V_CC = +5V
+
C_{1 –}
–5V
+5V
+
C_{2 –}
–5V
C₄
+ – _{VDD Storage Capacitor}
– + _{VSS Storage Capacitor}
C₃
Figure 18. Charge Pump — Phase 3
V_CC = +5V
+
C_{1 –}
+10V
+
C_{2 –}
C₄
+ – _{VDD Storage Capacitor}
– + _{VSS Storage Capacitor}
C₃
Figure 19. Charge Pump — Phase 4
Date: 02/31/06
SP3222EU, SP3232EU 3.3V, 1000Kbps RS-232 Transceivers
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© Copyright 2006 Sipex Corporation