- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄1969 > SP508EF-L (Exar Corporation)IC TXRX MULTIPROTOCOL 100LQFP PDF資料下載
參數(shù)資料
| 型號： | SP508EF-L |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 13/29頁 |
| 文件大小： | 0K |
| 描述： | IC TXRX MULTIPROTOCOL 100LQFP |
| 標(biāo)準(zhǔn)包裝： | 90 |
| 類型： | 收發(fā)器 |
| 驅(qū)動器/接收器數(shù)： | 8/8 |
| 規(guī)程： | 多協(xié)議 |
| 電源電壓： | 5V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 100-LQFP |
| 供應(yīng)商設(shè)備封裝： | 100-LQFP（14x14） |
| 包裝： | 托盤 |
| 其它名稱： | 1016-1193 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁當(dāng)前第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁
20
ExarCorporation48720KatoRoad,FremontCA,9453850-668-707www.exar.comSP508_00_02709
TheSP508containshighlyintegratedserial
transceiversthatofferprogrammability
between interface modes through software
control. The SP508 offers the hardware
interfacemodesforRS-232(V.28),RS-449/
V.36(V.andV.0),EIA-530(V.andV.0),
EIA-530A(V.andV.0),V.35(V.35andV.28)
andX.2(V.).Theinterfacemodeselection
isdoneviathreecontrolpins,whichcanbe
latchedviamicroprocessorcontrol.
TheSP508haseightdrivers,eightreceivers,
andExar'spatentedon-boardchargepump
(5,306,954)thatisideallysuitedforwidearea
networkconnectivityandothermulti-protocol
applications.Otherfeaturesincludedigitaland
lineloopbackmodes,individualenable/disable
controllinesforeachdriverandreceiver,fail-
safewheninputsareeitheropenorshorted,
individualterminationresistorgroundpaths,
separatedriverandreceivergroundoutputs,
enhanced ESD protection on driver outputs
andreceiverinputs.
ThEORYOFOPERATION
TheSP508deviceismadeupof)thedrivers,
2)thereceivers,3)achargepump,4)DTE/DCE
switchingalgorithm,and5)controllogic.
Drivers
TheSP508haseightenhancedindependent
drivers.Controlforthemodeselectionisdone
viaathree-bitcontrolwordintoD0,D,and
D2.Thedriversareprearrangedsuchthatfor
eachmodeofoperation,therelativeposition
andfunctionalityofthedriversaresetupto
accommodate the selected interface mode.
Asthemodeofthedriversischanged,the
electricalcharacteristicswillchangetosupport
therequiredsignallevels.Themodeofeach
driverinthedifferentinterfacemodesthatcan
beselectedisshowninTable.
Therearefourbasictypesofdrivercircuits–
ITU-T-V.28 (RS-232), ITU-T-V.0 (RS-423),
ITU-T-V.(RS-422),andCCITT-V.35.
The V.28 (RS-232) drivers output single-
endedsignalswithaminimumof+5V(with
3k & 2500pF loading), and can operate over
20kbps.SincetheSP508usesachargepump
togeneratetheRS-232outputrails,thedriver
outputswillneverexceed+0V.TheV.28driver
architectureissimilartoExar'sstandardline
ofRS-232transceivers.
The RS-423 (V.0) drivers are also single-
endedsignalswhichproduceopencircuitV
OL
and V
OH measurements of +4.0V to +6.0V.
When terminated with a 450 load to ground,
thedriveroutputwillnotdeviatemorethan0%
oftheopencircuitvalue.Thisisincompliance
oftheITUV.10specification.TheV.10(RS-423)
driversareusedinRS-449/V.36,EIA-530,and
EIA-530AmodesasCategoryIIsignalsfrom
each of their corresponding specifications.
TheV.0driversareguaranteedtotransmit
over20kbps,butcanoperateatoverMbps
ifnecessary.
The third type of drivers are V. (RS-422)
differential drivers. Due to the nature of
differential signaling, the drivers are more
immunetonoiseasopposedtosingle-ended
transmission methods. The advantage is
evidentoverhighspeedsandlongtransmission
lines.Thestrengthofthedriveroutputscan
producedifferentialsignalsthatcanmaintain
+2V differential output levels with a load of
100. The signal levels and drive capability of
thesedriversallowthedriverstoalsosupport
RS-485 requirements of +.5V differential
output levels with a 54 load. The strength
allows the SP508 differential driver to drive
over long cable lengths with minimal signal
degradation. The V. drivers are used in
RS-449,EIA-530,EIA-530AandV.36modes
asCategoryIsignalswhichareusedforclock
and data. Exar's new driver design over its
predecessorsallowtheSP508tooperateover
20Mbpsfordifferentialtransmission.
FEATURES
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SP510CM-L | IC TXRX MULTIPROTOCOL HS 100LQFP |
| SP526CF-L | IC TXRX WAN MULTI-MODE 44LQFP |
| SP5301CY-L/TR | IC TXRX SERIAL BUS UNIV 14TSSOP |
| SPC5200CBV400 | IC MPU 32BIT 400MHZ 272-PBGA |
| SPC5200CVR400 | IC MPU 32BIT 400MHZ 272-PBGA |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP509 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Rugged 40Mbps, 8 Channel Multi-Protocol Transceiver with Programmable DCE/DTE and Termination Resistors |
| SP509_05 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Rugged 40Mbps, 8 Channel Multi-Protocol Transceiver with Programmable DCE/DTE and Termination Resistors |
| SP509CF | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Rugged 40Mbps, 8 Channel Multi-Protocol Transceiver with Programmable DCE/DTE and Termination Resistors |
| SP509CFL | 制造商:SIPEX 功能描述:Pb Free |
| SP509CF-L | 功能描述:外圍驅(qū)動器與原件 - PCI 40MBPS 8CH MULTI 0-70C RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。