元器件交易网
PRELIMINARY
IntegratedCircuit
Systems, Inc.
CRYSTAL-TO-LVCMOS / LVTTL
FREQUENCY SYNTHESIZER WITH FANOUT BUFFER
TypePowerOutputPowerOutputOutputOutputOutputOutputUnusedInputPowerPowerInputInputInputInput
Pullup
DescriptionOutputsupplypins.
Clockoutput.LVCMOS/LVTTLinterfacelevels.Powersupplyground.
Clockoutput.LVCMOS/LVTTLinterfacelevels.Clockoutput.LVCMOS/LVTTLinterfacelevels.Clockoutput.LVCMOS/LVTTLinterfacelevels.Clockoutput.LVCMOS/LVTTLinterfacelevels.Clockoutput.LVCMOS/LVTTLinterfacelevels.
Noconnect.
SelectsbetweenthePLLandcrystalinputsastheinputtothedividers.WhenHIGH,selectsPLL.WhenLOW,selectsXTAL1,XTAL2.LVCMOS/LVTTLinterfacelevels.Coresupplypin.Analogsupplypin.
Crystaloscillatorinterface.XTAL1istheinput.XTAL2istheoutput.ActiveHIGHMasterReset.WhenlogicHIGH,theinternaldividersareresetcausingtheoutputstogolow.WhenlogicLOW,the
Pulldown
internaldividersandtheoutputsareenabled.LVCMOS/LVTTLinterfacelevels.PulldownFeedbackfrequencyselectpin.LVCMOS/LVTTLinterfacelevels.Pullup
Outputfrequencyselectpin.LVCMOS/LVTTLinterfacelevels.
ICS84025
TABLE 1. PIN DESCRIPTIONS
Number1,5,9,13
2
3,7,11,15,19
46810121416171820,21222324
NameVDDOQ0GNDQ1Q2Q3Q4Q5ncPLL_SELVDDVDDA
XTAL2,XTAL1
MRF_SEL1F_SEL0
NOTE:PullupandPulldownrefertointernalinputresistors.SeeTable2,PinCharacteristics,fortypicalvalues.
TABLE 2. PIN CHARACTERISTICS
SymbolCINRPULLUPRPULLDOWNCPD
ParameterInputCapacitanceInputPullupResistorInputPulldownResistorPowerDissipationCapacitance(peroutput)
VDD,VDDO=3.465VVDD=3.465V,VDDO=2.625VVDD=3.465V,VDDO=1.95V
5151TBDTBDTBD
TestConditions
Minimum
Typical
Maximum
4
UnitspFK K pFpFpF
84025EM
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2
REV. A APRIL 16, 2003