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PI3USB221 датащи(PDF) 5 Page - Pericom Semiconductor Corporation |
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PI3USB221 датащи(HTML) 5 Page - Pericom Semiconductor Corporation |
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5 / 12 page ![]() 5 PS9053 10/28/09 PI3USB221 High-Speed USB2.0 1:2 Multiplexer/ DeMultiplexer Switch with Signal Enable SWITCHING CHARACTERISTICSoveroperatingrange,TA=–40°Cto85°C,VDD=3.3V±10%,GND=0V Symbol Parameter Min Typ1 Max Unit tpd PropagationDelay2,3 0.25 ns tON Lineenabletime StoD,nD 125 OEtoD,nD 100 tOFF Linedisabletime StoD,nD 12 OEtoD,nD 12 tSK(O) Outputskewbetweencenterporttoanyotherport2 0.1 0.2 tSK(P) Skewbetweenoppositetransitionsofthesameoutput (tPHL–tPLH)2 0.1 0.2 Notes: 1. ForMaxorMinconditions,usetheappropriatevaluespecifiedunderElectricalCharacteristicsfortheapplicabledevicetype. 2. Specifiedbydesign 3. TheswitchcontributesnopropagationaldelayotherthantheRCdelayoftheonresistanceoftheswitchandtheloadcapacitance.Thetime constantfortheswitchaloneisoftheorderof0.25nsfor10-pFload.Sincethistimeconstantismuchsmallerthantherise/falltimesoftypical drivingsignals,itaddsverylittlepropagationaldelaytothesystem.Propagationaldelayofthebusswitch,whenusedinasystem,isdetermined bythedrivingcircuitonthedrivingsideoftheswitchanditsinteractionswiththeloadonthedrivenside. 09-0004 |
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