SP3243EUEA-L-TR Datasheet, PDF (13/25 Pages) Exar Corporation – 3 Driver/5 Receiver Intelligent +3.0V to +5.5V RS-232 Transceivers

V_CC = +5V
+
C_{1 –}
–5V
+5V
+
C_{2 –}
–5V
Figure 15. Charge Pump — Phase 1
V_CC = +5V
+
C_{1 –}
Figure 16. Charge Pump — Phase 2
+
C_{2 –}
-5.5V
C₄
+ – _{VDD Storage Capacitor}
– + _{VSS Storage Capacitor}
C₃
C₄
+ – _{VDD Storage Capacitor}
– + _{VSS Storage Capacitor}
C₃
V_CC = +5V
+
C_{1 –}
–5V
+5V
+
C_{2 –}
–5V
Figure 17. Charge Pump — Phase 3
C₄
+ – _{VDD Storage Capacitor}
– + _{VSS Storage Capacitor}
C₃
V_CC = +5V
+
C_{1 –}
+5.5V
+
C_{2 –}
Figure 18. Charge Pump — Phase 4
C₄
+ – _{VDD Storage Capacitor}
– + _{VSS Storage Capacitor}
C₃
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
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