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SP3220EB датащи(PDF) 13 Page - Exar Corporation

номер детали SP3220EB
подробное описание детали  3.0V to 5.5V RS-232 Driver/Receiver Pair
PDF  21 Pages
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производитель  EXAR [Exar Corporation]
домашняя страница  http://www.exar.com
Logo EXAR - Exar Corporation

SP3220EB датащи(HTML) 13 Page - Exar Corporation

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Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
SP3220E_EB_EU_101_060311
13
Figure 16. Charge Pump — Phase 2
VCC = +5V
VSS Storage Capacitor
VDD Storage Capacitor
C1
C2
C3
C4
+
+
+
+
–
–
–
–
-5.5V
VCC = +5V
–5V
–5V
+5V
VSS Storage Capacitor
VDD Storage Capacitor
C1
C2
C3
C4
+
+
+
+
–
–
–
–
Figure 15. Charge Pump — Phase 1
Figure 18. Charge Pump — Phase 3
VCC = +5V
–5V
–5V
+5V
VSS Storage Capacitor
VDD Storage Capacitor
C1
C2
C3
C4
+
+
+
+
–
–
–
–
Figure 19. Charge Pump — Phase 4
VCC = +5V
VSS Storage Capacitor
VDD Storage Capacitor
C1
C2
C3
C4
+
+
+
+
–
–
–
–
+5.5V
Figure 17. Charge Pump Waveforms
Ch1 2.00V Ch2 2.00V M 1.00µs Ch1 5.48V
2
1
T
T
[
]
T
+6V
a) C2+
b) C2-
GND
GND
-6V
DESCRIPTION



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