參數(shù)資料
型號: SP3232EHCT-L
廠商: Exar Corporation
文件頁數(shù): 2/16頁
文件大?。?/td> 0K
描述: IC TXRX RS232 ESD 16WSOIC
產(chǎn)品變化通告: Interface Product Discontinuation 10/May/2011
標準包裝: 41
類型: 收發(fā)器
驅(qū)動器/接收器數(shù): 2/2
規(guī)程: RS232
電源電壓: 3 V ~ 5.5 V
安裝類型: 表面貼裝
封裝/外殼: 16-SOIC(0.295",7.50mm 寬)
供應(yīng)商設(shè)備封裝: 16-SOIC W
包裝: 管件
10
Exar Corporation 48720 Kato Road, Fremont CA, 94538 510-668-7017 www.exar.com
SP3232EH_102_031413
Figure 10. Charge Pump — Phase 2
VCC = +5V
VSS Storage Capacitor
VDD Storage Capacitor
C1
C2
C3
C4
+
-5.5V
VCC = +5V
–5V
+5V
VSS Storage Capacitor
VDD Storage Capacitor
C1
C2
C3
C4
+
Figure 9. Charge Pump — Phase 1
Figure 11. Charge Pump Waveforms
Ch1 2.00V Ch2 2.00V M 1.00ms Ch1 5.48V
2
1
T
[
]
T
+6V
a) C2+
b) C2-
GND
-6V
DESCRIPTION
Since both V+ and Vare separately gen-
erated from V
CC, in a no–load condition V
+
and Vwill be symmetrical. Older charge
pump approaches that generate Vfrom
V+ will show a decrease in the magnitude
of Vcompared to V+ due to the inherent
inefficiencies in the design.
The clock rate for the charge pump typi-
cally operates at greater than 250kHz. The
external capacitors can be as low as 0.1F
with a 16V breakdown voltage rating.
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