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參數資料
| 型號： | SP3227EEY-L |
| 廠商： | Exar Corporation |
| 文件頁數： | 5/23頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC TXRX RS232 ESD SD 16TSSOP |
| 標準包裝： | 95 |
| 類型： | 收發(fā)器 |
| 驅動器/接收器數： | 1/1 |
| 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-TSSOP（0.173"，4.40mm 寬） |
| 供應商設備封裝： | 16-TSSOP |
| 包裝： | 管件 |
| 其它名稱： | 1016-1506-5 SP3227EEY-L-ND |
3
Exar Corporation 48720 Kato Road, Fremont CA, 94538 50-668-707 www.exar.com
SP3224E,3225E,3226E,3227E_0_087
THEORy OF OPERATION
TheSP3224E-SP3227Edeviceshavethe
advancedAutoOn-LinePlusfeature
RS-232signalsusebothpositiveandneg-
ativevoltagesofgreaterthan±5Vmagni-
tude.Receivershavenominal5kΩimped-
ancetoground.Evenwhenidle,drivers
willmaintainoutputsignalvoltagecreating
a continuous current flow. In low power,
batteryoperateddevicesthisconstantcur-
rentdraincandecreasebatterylife
significantly.
are widely used for power-supply decou-
pling)areidealforuseonthechargepump.
Thechargepumpsaredesignedtobeable
to function properly with a wide range of
capacitorstylesandvalues.Ifpolarizedca-
pacitorsareusedthepositiveandnegative
terminals should be connected as shown
ontheTypicalOperatingCircuit.
Capacitance values may be increased if
operatingathigherVccortoprovidegreat-
erstabilityasthecapacitorsage.
Minimum Recommended Charge Pump Capacitor Values
InputVoltageVcc
ChargePumpCapacitorValueforSP32XX
3.0Vto3.6V
C-C4=0.F
4.5Vto5.5V
C=0.047F, C2-C4=0.33F
3.0Vto5.5V
C-C4=0.22F
ChargePumpCapacitorValues
C
2
+
-
V
CC
C
3
C
4
C
1
+
e-
Phases 1 and 3: Store/Double.
Double charge from C1 onto C2.
C2 is now charged to -2xVcc
+
C
2
+
-
V
CC
C
3
C
4
C
1
+
e-
+
e+
C
2
+
-
V
CC
C
3
C
4
C
1
+
Phase 2 – Vss transfer from C2 to C4.
Meanwhile C1 is charged to Vcc
e-
+
Vss
transfer from C2 to C3.
Meanwhile C1 is charged to Vcc
V
DD
V-
V+
V-
V+
Patented 5,306,954
Phase 4 VDD
ChargePumpPhases
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相關代理商/技術參數 |
參數描述 |
|---|---|
| SP3227EEY-L/TR | 功能描述:RS-232接口集成電路 1MBPS+3-+5.5V RS-232 AUTO ONLINE PLUS RoHS:否 制造商:Exar 數據速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| SP322CF | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Programmable V.11/V.35 Transceiver |
| SP322CF-L | 功能描述:外圍驅動器與原件 - PCI PROGRAMMABLE V.11/V.35 W/INT TERM RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
| SP3231W-SM | 制造商:Panasonic Industrial Company 功能描述:SERVICE MANUAL |
| SP3232 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:3.3V, 1000 Kbps RS-232 Transceivers |
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