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ABSOLUTEMAXIMUMRATINGS
DISSIPATIONRATINGS
TRF7900A
SWRS031–OCTOBER2005
Thereceiveralsogenerates8frequenciesthatcanbeprogrammaticallyselectedviatheI
2
Cinterfacebusfor
boththemousechanneland/orthekeyboardchannel.another6-mhzclockisinternallygeneratedtoclockthe
usbmicrocontroller;thisenablesasinglecrystaltobeusedtosupplytheclockneedsforthereceiverchannels
andthemicrocontroller.
theoptimizedreceiverdesignenablessimultaneousreceptiononbothparallelchannelsupto5khz(10kbps
millerencoding)perchannel.areceivestrengthsignalindicatorregistercanbereadviathei
2
Cbustodetermine
thesignalstrength.correlatingtherssireadingtothepacketerrorrateenablesthecontrollertodiagnosethe
signalandunderstandtheusercondition.
ORDERINGINFORMATION
packageddevicespackagetypetransportmedia,quantity
trf7900apwtssop-28rails,50
trf7900apwrtssop-28tapeandreel,2000
overoperatingfree-airtemperaturerange(unlessotherwisenoted)
VALUEUNIT
(1)
V
S–
tosupplyvoltage5.5v
V
S+
V
I
Inputvoltage
±
V
S
±
0.5v
V
ID
Differentialinputvoltage
±
2V
ContinuouspowerdissipationSeeDissipationRatingTable
T
J
maximumjunctiontemperature,anycondition
(2)
150
°
C
T
J
maximumjunctiontemperature,continuousoperation,longterm125
°
C
可靠性(3)
T
stg
storagetemperaturerange-65to150
°
C
leadtemperature1,6mm(1/16inch)fromcasefor10seconds300
°
C
esdratings:humanbodymodel4000v
esdratings:chargeddevicemodel1500v
esdratings:machinemodel200v
(1)theabsolutemaximumratingsunderanyconditionislimitedbytheconstraintsofthesiliconprocess.stressesabovetheseratingsmay
causepermanentdamage.exposuretoabsolutemaximumconditionsforextendedperiodsmaydegradedevicereliability.theseare
stressratingsonly,andfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthosespecifiedisnotimplied.
(2)themaximumjunctiontemperatureforcontinuousoperationislimitedbypackageconstraints.operationabovethistemperaturemay
resultinreducedreliabilityand/orlifetimeofthedevice.
POWERRATING
(2)
包装
θ
JC
θ
JA
(1)
T
一个
≤
25
°
CT
一个
=85
°
C
pw(28)13.756.51.77w708mw
(1)thisdatawastakenusingthejedecstandardhigh-ktestpcb.
(2)powerratingisdeterminedwithajunctiontemperatureof125
°
c.thisisthepointwheredistortionstartstosubstantiallyincrease.
ThermalmanagementofthefinalPCBshouldstrivetokeepthejunctiontemperatureatorbelow125
°
Cforbestperformanceandlong
termreliability.
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