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参数资料
| 型号： | SP3225ECA-L |
| 厂商： | Exar Corporation |
| 文件页数： | 6/23页 |
| 文件大小： | 0K |
| 描述： | IC TXRX RS232 ESD SD 20SSOP |
| 标准包装： | 66 |
| 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-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 20-SSOP |
| 包装： | 管件 |
4
Exar Corporation 48720 Kato Road, Fremont CA, 94538 50-668-707 www.exar.com
SP3224E,3225E,3226E,3227E_0_087
thatsavespowerbyturningoffthecharge
pumpsanddriveroutputswhenthetrans-
ceiverinputsareidleformorethan30sec-
onds.Auto On-line Plus is equivalent to
Maxim’s“AutoShutdownPlus”feature.It
differs from our existingAuto On-line by
relying on signal transitions rather than
voltage levels to trigger shutdown and
wakeup.
AutoOn-LinePlusautomaticallyputsthe
deviceintoastandbymodewhereitdraws
only1μAtypical.Whenthedevicedetects
activityoneitherthereceiverordriverin-
putsitwillautomaticallyawakeandactivate
to allow serial communication. Both the
wakeup and shutdown happen automati-
cally,withoutanyuserintervention,special
drivers,orsoftwaremodifications.
Wakeup and shutdown can be exter-
nally controlled by the ONLINE and
SHUTDOWNpins.WhenONLINEisdriv-
en to logic LOW, the Auto On-line Plus
functionisactive.DrivingSHUTDOWN to
+0.3V
R_IN
-0.3V
30s
timer
STATUS
INVALID ASSERTED IF ALL RECEIVER INPUTS ARE
BETWEEN +0.3V AND -0.3V FOR AT LEAST 30S
T_IN
R_IN EDGE
DETECT
EDGE
DETECT
SHUTDOWN
S
A
ONLINE
30s
timer
Figure 3a.STATUS Functional Diagram STATUS low
Figure 3c. Auto On-line¨ Plus Logic
+2.7V
R_IN
-2.7V
30s
timer
STATUS
INVALID DEASSERTED IF ALL RECEIVER INPUTS ARE
BETWEEN +2.7V AND -2.7V FOR AT LEAST 30S
Figure 3b. STATUS Functional Diagram, STATUS high.
SHUTDOWN
ONLINE
AUTO ONLINE
POWERDOWN
POWERDOWN IS ONLY A INTERNAL SIGNAL. IT
CONTROLS THE OPERATIONAL STATUS TO THE
TRANSMITTERS AND THE POWER SUPPLIES.
Figure 3d. Powerdown Logic
AUTO ONLINE
logicLOWforcesthedeviceintoshutdown
stateregardlessofinputactivityorthesta-
tusoftheONLINE pin.
TheSTATUSoutputdetermineswhethera
validRS-232signalvoltageispresenton
theinputs.TheSTATUSpingoestoalogic
LOWwhenthereceiverinputsignallevels
collapsenearreferenceground.Thismay
occur when the RS-232 cable is discon-
nected or the RS-232 drivers of the con-
nectedperipheralareturnedoff.
STATUSmaybeusedtoindicateDTRora
RingIndicatorsignalortodeterminewheth-
eraliveRS232driverorcableisconnect-
ed. By connecting the STATUS output to
ONLINEinput,theSP3224E-SP3227Ewill
shutdownwhennovalidsignalleveland
noinputtransitionsaredetected,andwake
uponavalidsignallevelorsignaledge.Ifit
detectsnosignaltransitionswiththepast30
seconds,thedevicewillgointolowpower
mode.ByconnectingtheSTATUSoutputto
boththeONLINEinputandSHUTDOWN
inputpins,thedeviceentersintoshutdown
whennotreceivingavalidRS-232signalvoltage
input.
WhentheSP3224E-SP3227Edevicesare
THEORy OF OPERATION
Receiver
5k
Ω
相关PDF资料 |
PDF描述 |
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| VI-21H-MY | CONVERTER MOD DC/DC 52V 50W |
| SP3224ECA-L | IC TXRX RS232 ESD 20SSOP |
| SP3227ECY-L | IC TXRX RS232 ESD SD 16TSSOP |
| VI-21H-IU-F4 | CONVERTER MOD DC/DC 52V 200W |
| SP3227ECA-L | IC TXRX RS232 ESD SD 16SSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SP3225ECA-L/TR | 功能描述:RS-232接口集成电路 1MBPS+3-+5.5V RS-232 AUTO ONLINE 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: |
| SP3225ECY-L | 功能描述:RS-232接口集成电路 1MBPS+3-+5.5V RS-232 AUTO ONLINE 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: |
| SP3225ECY-L/TR | 功能描述:RS-232接口集成电路 1MBPS+3-+5.5V RS-232 AUTO ONLINE 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: |
| SP3225EEA-L | 功能描述:RS-232接口集成电路 1MBPS+3-+5.5V RS-232 AUTO ONLINE 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: |
| SP3225EEA-L/TR | 功能描述:RS-232接口集成电路 1MBPS+3-+5.5V RS-232 AUTO ONLINE 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: |
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