参数资料
型号: SP3226ECY-L
厂商: Exar Corporation
文件页数: 5/23页
文件大小: 0K
描述: IC TXRX RS232 ESD SD 16TSSOP
标准包装: 95
类型: 收发器
驱动器/接收器数: 1/1
规程: RS232
电源电压: 3 V ~ 5.5 V
安装类型: 表面贴装
封装/外壳: 16-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 16-TSSOP
包装: 管件
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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SP3226ECY-L/TR 功能描述:RS-232接口集成电路 INTELLIGENT +3-+5.5V RS-232 AUTO ONLINE RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装:
SP3226EEA-L 功能描述:RS-232接口集成电路 INTELLIGNET +3V-5.5V RS232 W/AUTO ON-LINE RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装:
SP3226EEA-L/TR 功能描述:RS-232接口集成电路 RS-232 Transceiver w/Auto On-Line Plus RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装:
SP3226EEY-L 功能描述:RS-232接口集成电路 INTELLIGENT +3-+5.5V RS-232 AUTO ONLINE RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装:
SP3226EEY-L/TR 功能描述:RS-232接口集成电路 INTELLIGENT +3-+5.5V RS-232 AUTO ONLINE RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: