参数资料
型号: SP3232EHEP-L
厂商: Exar Corporation
文件页数: 2/16页
文件大小: 0K
描述: IC TXRX RS232 ESD 16PDIP
产品变化通告: Interface Product Discontinuation 10/May/2011
标准包装: 25
类型: 收发器
驱动器/接收器数: 2/2
规程: RS232
电源电压: 3 V ~ 5.5 V
安装类型: 通孔
封装/外壳: 16-DIP(0.300",7.62mm)
供应商设备封装: 16-PDIP
包装: 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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