ICS84025中文资料(2)

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

/products/hiperclocks.html

2

REV. A APRIL 16, 2003

百度搜索“77cn”或“免费范文网”即可找到本站免费阅读全部范文。收藏本站方便下次阅读，免费范文网，提供经典小说教育文库ICS84025中文资料(2)在线全文阅读。