参数资料
型号: SP3223ECY-L/TR
厂商: Exar Corporation
文件页数: 4/20页
文件大小: 0K
描述: IC TXRX RS232 INTELLIGNT 20TSSOP
产品变化通告: Packaging Change 15/Jul/2010
标准包装: 1,500
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: 表面贴装
封装/外壳: 20-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 20-TSSOP
包装: 带卷 (TR)
Exar Corporation 48720 Kato Road, Fremont CA, 94538 (50)668-707 www.exar.com
SP3223E/EB/EU_0_06272
2
Figure 6. Charge Pump - Phase
Figure 7. Charge Pump - Phase 2
VCC = +5V
–5V
+5V
VSS Storage Capacitor
VDD Storage Capacitor
C1
C2
C3
C4
+
VCC = +5V
–10V
VSS Storage Capacitor
VDD Storage Capacitor
C1
C2
C3
C4
+
Ch1 2.00V Ch2 2.00V M 1.00ms Ch1 1.96V
2
1
T
[
]
T
2
+6V
a) C2+
b) C2-
-6V
0V
Figure 8. Charge Pump Waveforms
Figure 9. Charge Pump - Phase 3
VCC = +5V
–5V
+5V
–5V
VSS Storage Capacitor
VDD Storage Capacitor
C1
C2
C3
C4
+
Figure 20. Charge Pump - Phase 4
VCC = +5V
+10V
VSS Storage Capacitor
VDD Storage Capacitor
C1
C2
C3
C4
+
Minimum recommended charge pump capacitor value
Input Voltage V
CC
Charge pump capacitor value
3.0V to 3.6V
C - C4 = 0.F
4.5V to 5.5V
C = 0.047F, C2-C4 = 0.33F
3.0V to 5.5V
C - C4 = 0.22F
Table 4. Minimum Charge Pump Capacitor values
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