PI6C20800AE中文资料

Features• Eight Pairs of Differential Clocks • Low skew < 50ps• Low Cycle-to-cycle jitter < 50ps • Output Enable for all outputs • Outputs Tristate control via SMBus • Power Management Control • Programmable PLL Bandwidth • PLL or Fanout operation • 3.3V Operation• Packaging (Pb-Free & Green):— 48-Pin SSOP (V) — 48-Pin TSSOP (A)DescriptionPI6C20800 is a high-speed, low-noise differential clock buffer designed to be a companion to PI6C410B. The device distributes the differential SRC clock from PI6C410B to eight differential pairs of clock outputs either with or without PLL. The input SRC clock can be divided by 2 when SRC_DIV# is LOW. The clock outputs are controlled by input selection of SRC_STOP#, PWRDWN# and SMBus, SCLK and SDA. When input of either SRC_STOP# or PWRDWN# is LOW, the output clocks are Tristated. When PWRDWN# is LOW, the SDA and SCLK inputs must be Tristated.PCI Express ChipsetsPin ConfigurationV DD_A V SS_A I REF LOCK OE_7OE_4OUT7OUT7#OE_INV V DD OUT6OUT6#OE_6OE_5OUT5OUT5#V SS V DD OUT4OUT4#PLL_BW#SRC_STOP PWRDWN# V SS484746454443424140393837363534333231302928272625123456789101112131415161718192021222324SRC_DIV#V DD V SS SRC SRC#OE_0OE_3OUT0OUT0#VSS V DD OUT1OUT1#OE_1OE_2OUT2OUT2#V SS V DD OUT3OUT3#PLL/BYPASS#SCLK SDAPI6C208001:8 Clock Driver for IntelPCI Express ChipsetsPin DescriptionsPin Name Type Pin #DescriptionsSRC_DIV#Input1 3.3V LVTTL input for selecting input frequency divide by 2,active LOW.SRC & SRC#Input4, 50.7V Differential SRC input from PI6C410 clock synthesizerOE [0:7]Input6, 7, 14, 15, 35, 36,43, 44 3.3V LVTTL input for enabling outputs, active HIGH.OE_INV Input403.3V LVTTL input for inverting the OE, SRC_STOP# and PWRDWN# pins.When 0 = same stageWhen 1 = OE[0:7], SRC_STOP#, PWRDWN# inverted.OUT[0:7] & OUT[0:7]#Output8, 9, 12, 13, 16 17,20, 21, 29, 30, 33, 34,37, 38, 41, 420.7V Differential outputsPLL/BYPASS#Input22 3.3V LVTTL input for selecting fan-out of PLL operation. SCLK Input23SMBus compatible SCLOCK inputSDA I/O24SMBus compatible SDATAI REF Input46External resistor connection to set the differential output current SRC_STOP#Input27 3.3V LVTTL input for SRC stop, active LOWPLL_BW#Input28 3.3V LVTTL input for selecting the PLL bandwidth PWRDWN# Input26 3.3V LVTTL input for Power Down operation, active LOW LOCK Output45 3.3V LVTTL output, transition high when PLL lock is achieved(Latched output)V DD Power2, 11, 19, 31, 39 3.3V Power Supply for OutputsV SS Ground3, 10, 18, 25, 32Ground for OutputsV SS_A Ground47Ground for PLLV DD_A Power48 3.3V Power Supply for PLLSerial Data Interface (SMBus)PI6C20800 is a slave only SMBus device that supports indexed block read and indexed block write protocol using a single 7-bit address and read/write bit as shown below.Address assignmentA6A5A4A3A2A1A0R/W 11011100/1 Data Protocol(1)1 bit7 bits118 bits18 bits18 bits18 bits1 1 bitStart bit SlaveAddr R/W AckRegisteroffset AckByteCount= NAck DataByte 0AckDataByte N- 1Ack StopbitNote:1. Register offset for indicating the starting register for indexed block write and indexed block read. Byte Count in write mode cannot be 0.PI6C208001:8 Clock Driver for IntelPCI Express ChipsetsData Byte 0: Control RegisterBit DescriptionsType Power Up ConditionOutput(s) Affected Pin 0SRC_DIV#0 = Divide by 21 = Normal RW1 = x1OUT[0:7], OUT[0:7]#NA1PLL/BYPASS#0 = Fanout 1 = PLLRW 1 = PLL OUT[0:7], OUT[0:7]#NA2PLL Bandwidth0 = HIGH Bandwidth,1 = LOW Bandwidth RW 1 = Low OUT[0:7], OUT[0:7]#NA 3TBD NA 4TBD NA 5TBDNA6SRC_STOP#0 = Driven when stopped 1 = TristateRW0 = Driven when stoppedOUT[0:7], OUT[0:7]#7PWRDWN#0 = Driven when stopped 1 = TristateRW 0 = Driven when stopped OUT[0:7], OUT[0:7]#NAData Byte 1: Control RegisterBit DescriptionsType Power Up ConditionOutput(s) Affected Pin 0OUTPUTS enable 1 = Enabled 0 = Disabled RW 1 = Enabled OUT0, OUT0#NA 1RW 1 = Enabled OUT1, OUT1#NA 2RW 1 = Enabled OUT2, OUT2#NA 3RW 1 = Enabled OUT3, OUT3#NA 4RW 1 = Enabled OUT4, OUT4#NA 5RW 1 = Enabled OUT5, OUT5#NA 6RW 1 = Enabled OUT6, OUT6#NA 7RW1 = EnabledOUT7, OUT7#NAPI6C208001:8 Clock Driver for IntelPCI Express ChipsetsData Byte 2: Control RegisterBit DescriptionsType Power Up Condition Output(s) Affected Pin 0Allow control of OUTPUTS with assertion of SRC_STOP#0 = Free running1 = Stopped with SRC_Stop#RW 0 = Free running OUT0, OUT0#NA 1RW 0 = Free running OUT1, OUT1#NA 2RW 0 = Free running OUT2, OUT2#NA 3RW 0 = Free running OUT3, OUT3#NA 4RW 0 = Free running OUT4, OUT4#NA 5RW 0 = Free running OUT5, OUT5#NA 6RW 0 = Free running OUT6, OUT6#NA 7RW0 = Free runningOUT7, OUT7#NAData Byte 3: Control RegisterBit DescriptionsType Power Up ConditionOutput(s) AffectedPin0TBD RW 1RW 2RW 3RW 4RW 5RW 6RW 7RWData Byte 4: Pericom ID RegisterBit DescriptionsType Power Up ConditionOutput(s) AffectedPin 0Pericom ID R 0NA NA 1R 0NA NA 2R 0NA NA 3R 0NA NA 4R 0NA NA 5R 1NA NA 6R 0NA NA 7RNANAPI6C208001:8 Clock Driver for IntelPCI Express ChipsetsFunctionalityPWRDWN#OUT OUT#SRC_Stop#OUT OUT#1Normal Normal 1Normal Normal 0I REF × 2 or FloatLOWI REF × 6 or FloatLOWFigure 1. Power down sequencePI6C208001:8 Clock Driver for IntelPCI Express ChipsetsDifferential Clock Buffer characteristicsSymbol Minimum Maximum R O 3000ΩN/A R OS unspecified unspecified V OUTN/A850mVCurrent AccuracySymbol Conditions Configuration LoadMin.Max.I OUTV DD = 3.30 ±5%R REF = 475Ω 1%I REF = 2.32mANominal test load for given configuration-12%I NOMINAL +12%I NOMINAL Note:1. I NOMINAL refers to the expected current based on the configuration of the device.Differential Clock Output CurrentBoard Target Trace/Term Z Reference R, Iref = V DD /(3xRr)Output Current V OH @ Z 100Ω(100Ω differential ≈ 15% coupling ratio)R REF = 475Ω 1%, I REF = 2.32mAI OH = 6 x I REF0.7V @ 50PI6C208001:8 Clock Driver for IntelPCI Express ChipsetsAbsolute Maximum Ratings (1) (Over operating free-air temperature range)Symbol ParametersMin.Max.UnitsV DD_A 3.3V Core Supply V oltage -0.5 4.6V V DD 3.3V I/O Supply V oltage -0.54.6V IH Input HIGH V oltage 4.6V IL Input LOW V oltage -0.5 Ts Storage Temperature -65150°C V ESDESD Protection2000VNote:1. Stress beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.DC Electrical Characteristics (V DD = 3.3±5%, V DD_A = 3.3±5%)Symbol Parameters ConditionMin.Max.UnitsV DD_A 3.3V Core Supply V oltage 3.135 3.465V V DD 3.3V I/O Supply V oltage 3.135 3.465V IH 3.3V Input HIGH V oltage V DD 2.0V DD + 0.3V IL 3.3V Input LOW V oltage V SS – 0.30.8I IK Input Leakage Current 0 < V IN < V DD -5+5μA V OH 3.3V Output HIGH V oltage I OH = -1mA 2.4V V OL 3.3V Output LOW V oltage I OL = 1mA 0.4I OH Output HIGH Current I OH = 6 x I REF , I REF = 2.32mA12.2mA 15.6C IN Logic Input Pin Capacitance 1.55pF C OUT Output Pin Capacitance6L PIN Pin Inductance 7nH I DD Power Supply Current V DD = 3.465V , F CPU = 200MHz250mAI SS Power Down Current Driven outputs 60I SS Power Down Current Tristate outputs12T AAmbient Temperature70°CPI6C208001:8 Clock Driver for IntelPCI Express ChipsetsAC Switching Characteristics (1,2,3) (V DD = 3.3±5%, V DD_A = 3.3±5%)Symbol ParametersMin Max.UnitsNotes T rise / T fall Rise and Fall Time (measured between 0.175V to 0.525V)175700ps 2ΔT rise / ΔT fall Rise and Fall Time Variation 1252T skew Output-to-Output Skew 50ps 3V HIGH V oltage HIGH 660850mV2V OVS Max. V oltage 1150V UDS Min. V oltage -300V LOW V oltage LOW-150+1502V cross Absolute crossing poing voltages 2505502ΔV cross Total Variation of V cross over all edges 1402T DC Duty Cycle4555%3T jcyc-cycJitter, Cycle-to-cycle (PLL Mode, Measurement for differential waveform)50psJitter, Cycle-to-cycle (BYPASS mode as additive jitter)Notes:1. Test configuration is R S = 33.2Ω, Rp = 49.9Ω, and 2pF.2. Measurement taken from Single Ended waveform.3. Measurement taken from Differential waveform.Configuration Test Load Board TerminationPI6C208001:8 Clock Driver for IntelPCI Express ChipsetsPackaging Mechanical: 48-Pin TSSOP (A)PI6C208001:8 Clock Driver for IntelPCI Express ChipsetsOrdering Information(1,2)Ordering Code Package Code Package Description PI6C20800VE VE48-pin, 300-mil wide, SSOP, Pb-Free and GreenPI6C20800AE AE48-pin, 240-mil wide, TSSOP, Pb-Free and GreenNotes:1. Thermal characteristics can be found on the company web site at /packaging/2. E = Pb-free and GreenPericom Semiconductor Corporation • 1-800-435-2336 • 。