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1、The Smart Timing ChoiceThe Smart Timing ChoiceSiTime Corporation990 Almanor Avenue, Sunnyvale, CA 94085(408) 328-Rev. 1.0Revised December 18, 2013SiT8920 -55C to +125C OscillatorFeaturesApplicationsFrequencies between 1 MHz and 110 MHz accurate to 6 decimal placesRuggedized equipment in harsh operat
2、ing environmentOperating temperature from -55C to 125CSupply voltage of 1.8V or 2.5V to 3.3VExcellent total frequency stability as low as 20 ppmLow power consumption of 3.4 mA typical at 1.8VLVCMOS/LVTTL compatible outputIndustry-standard packages: 2.0 x 1.6, 2.5 x 2.0, 3.2 x 2.5, 5.0 x 3.2, 7.0 x 5
3、.0 mm x mmInstant samples with Time Machine II and field programmable oscillatorsRoHS and REACH compliant, Pb-free, Halogen-free and Antimony-freeElectrical SpecificationsTable 1. Electrical Characteristics1,2ParametersSymbolMin.Typ.Max.UnitConditionFrequency RangeOutput Frequency Rangef1110MHzRefer
4、 to Table 13 for the exact list of supported frequencies list of supported frequenciesFrequency Stability and AgingFrequency StabilityF_stab-20+20ppmInclusive of Initial tolerance at 25C, 1st year aging at 25C, and variations over operating temperature, rated power supply voltage and load (15 pF 10%
5、).-25+25ppm-30+30ppm-50+50ppmOperating Temperature RangeOperating Temperature Range T_use-55+125CSupply Voltage and Current ConsumptionSupply VoltageVdd1.621.81.98V2.252.52.75V2.522.83.08V2.73.03.3V2.973.33.63V2.253.63VCurrent ConsumptionIdd3.84.5mANo load condition, f = 20 MHz, Vdd = 2.8V, 3.0V or
6、3.3V3.64.2mANo load condition, f = 20 MHz, Vdd = 2.5V3.44mANo load condition, f = 20 MHz, Vdd = 1.8VOE Disable CurrentI_od4.1mAVdd = 2.5V to 3.3V, OE = Low, output in high Z state.3.8mAVdd = 1.8V, OE = Low, output in high Z state.Standby CurrentI_std2.68.5AVdd = 2.8V to 3.3V, ST = Low, Output is Wea
7、kly Pulled Down 1.45.5AVdd = 2.5V, ST = Low, Output is Weakly Pulled Down0.63.5AVdd = 1.8V, ST = Low, Output is Weakly Pulled DownLVCMOS Output CharacteristicsDuty CycleDC4555%All VddsRise/Fall TimeTr, Tf1.02.0nsVdd = 2.5V, 2.8V, 3.0V or 3.3V, 20% - 80% 1.32.5nsVdd =1.8V, 20% - 80% 1.03nsVdd = 2.25V
8、 - 3.63V, 20% - 80%Output High VoltageVOH90%VddIOH = -4 mA (Vdd = 3.0V or 3.3V) IOH = -3 mA (Vdd = 2.8V or 2.5V) IOH = -2 mA (Vdd = 1.8V)Output Low VoltageVOL10%VddIOL = 4 mA (Vdd = 3.0V or 3.3V) IOL = 3 mA (Vdd = 2.8V or 2.5V) IOL = 2 mA (Vdd = 1.8V)Shen Zhen YANG XING TECHNOLOGY Co.,Ltd.Shen Zhen
9、YANG XING TECHNOLOGY Co.,Ltd.WWW.YXC.HKWWW.YXC.HKThe Smart Timing ChoiceThe Smart Timing ChoiceSiT8920 -55C to +125C OscillatorRev. 1.0Page 2 of 13 Notes: 3. In OE or ST mode, a pull-up resistor of 10kohm or less is recommended if pin 1 is not externally driven. If pin 1 needs to be left floating, u
10、se the NC option.4. A capacitor of value 0.1 F or higher between Vdd and GND is required.Table 1. Electrical Characteristics1,2 (continued)ParametersSymbolMin.Typ.Max.UnitConditionInput CharacteristicsInput High VoltageVIH70%VddPin 1, OE or STInput Low VoltageVIL30%VddPin 1, OE or STInput Pull-up Im
11、pedenceZ_in5087150kPin 1, OE logic high or logic low, or ST logic high2MPin 1, ST logic lowStartup and Resume TimingStartup TimeT_start5msMeasured from the time Vdd reaches 90% of final valueEnable/Disable TimeT_oe130nsf = 110 MHz. For other frequencies, T_oe = 100 ns + 3 * clock periods Resume Time
12、T_resume5msMeasured from the time ST pin crosses 50% thresholdJitterRMS Period Jitter T_jitt1.62.5psf = 75MHz, Vdd = 2.5V, 2.8V, 3.0V or 3.3V1.93psf = 75MHz, Vdd = 1.8VPeak-to-peak Period JitterT_pk1220psf = 75MHz, Vdd = 2.5V, 2.8V, 3.0V or 3.3V1425psf = 75MHz,Vdd = 1.8VRMS Phase Jitter (random)T_ph
13、j0.50.8psf = 75MHz, Integration bandwidth = 900 kHz to 7.5 MHz1.32psf = 75MHz, Integration bandwidth = 12 kHz to 20 MHzNote: 1. All electrical specifications in the above table are specified with 15 pF output load and for all Vdd(s) unless otherwise stated. 2. The typical value of any parameter in t
14、he Electrical Characteristic table is specified for the nominal value of the highest voltage option for that parameter and at 25 C temperature.Table 2. Pin DescriptionPinSymbolFunctionality1OE/ ST/NCOutput EnableH3: specified frequency output L: output is high impedance. Only output driver is disabl
15、ed.StandbyH3: specified frequency output L: output is low (weak pull down). Device goes to sleep mode. Supply current reduces to I_std.No ConnectAny voltage between 0 and Vdd or Open3: Specified frequency output. Pin 1 has no function.2GNDPowerElectrical ground43OUTOutputOscillator output4VDDPowerPo
16、wer supply voltage414OE/ST/NCVDD32GNDOUTFigure 1. Pin AssignmentsTop ViewShen Zhen YANG XING TECHNOLOGY Co.,Ltd.Shen Zhen YANG XING TECHNOLOGY Co.,Ltd.WWW.YXC.HKWWW.YXC.HKThe Smart Timing ChoiceThe Smart Timing ChoiceSiT8920 -55C to +125C OscillatorRev. 1.0Page 3 of 13 NNote: 6. Refer to JESD51-7 for JA and JC definitions, and reference la
