參數(shù)資料
型號(hào): SP3223EUEY-L
廠商: Exar Corporation
文件頁數(shù): 4/20頁
文件大小: 0K
描述: IC TXRX RS232 INTELLIGNT 20TSSOP
標(biāo)準(zhǔn)包裝: 74
類型: 收發(fā)器
驅(qū)動(dòng)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: 20-TSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 20-TSSOP
包裝: 管件
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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