SP3238E Datasheet, PDF (12/20 Pages) Sipex Corporation – Intelligent +3.0V to +5.5V RS-232 Transceivers

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
V_CC = +5V
+
C_{1 –}
–5V
+5V
+
C_{2 –}
–5V
Figure 14. Charge Pump — Phase 3
C₄
+ – _{VDD Storage Capacitor}
– + _{VSS Storage Capacitor}
C₃
V_CC = +5V
+
C_{1 –}
+10V
+
C_{2 –}
Figure 15. Charge Pump — Phase 4
C₄
+ – _{VDD Storage Capacitor}
– + _{VSS Storage Capacitor}
C₃
SP3238EDS/04
SP3238E +3.0V to +5.5V RS-232 Transceivers
12
© Copyright 1999 Sipex Corporation