■OperatingExplanation
●Timing Chart (Pull up voltage =Input voltage VIN1)
●Operational Notes (N-ch Open drain)
TimingChartA(VIN1=voltagesabovereleasevoltage,VIN2=sweepvoltage)
Becauseavoltagehigherthantheminimumoperatingvoltageisappliedtothevoltageinputpin(VIN),groundvoltagewillbeoutputatthe
outputpin(VDET)duringstage3.(Stages1,2,4,5arethesameasinBbelow).
TimingChartB(VIN1=VIN2)
qWhenavoltagegreaterthanthereleasevoltage(VDR)isappliedtothevoltageinputpin(VIN1,VIN2),inputvoltage(VIN1,VIN2)willgradually
fall.
Whenavoltagegreaterthanthedetectvoltage(VDF)isappliedtothevoltageinputpin(VIN1,VIN2),astateofhighimpedancewillexistat
theoutputpin(VDET1,VDET2),soshouldthepinbepulledup,voltagewillbeequaltopullupvoltage.
wWheninputvoltage(VIN1,VIN2)fallsbelowdetectvoltage(VDF),outputvoltage(VDET1,VDET2)willbeequaltogroundlevel(VSS).
eShouldinputvoltage(VIN1,VIN2)fallbelowtheminimumoperationalvoltage(VMIN),outputwillbecomeunstable.ShouldVIN2 fallbelowVMIN,
voltageattheoutputpin(VDET2)willbeequaltogroundlevel(VSS)ifthepowersupply(VIN1)iswithintheoperatingvoltagerange.
*Ingeneraltheoutputpinispulledupsooutputwillbeequaltopullupvoltage.
rShould input voltage (VIN1, VIN2) rise above ground voltage (VSS), output voltage (VDET1, VDET2) will equal ground level until the release
voltagelevel(VDR)isreached.
tWheninputvoltage(VIN1,VIN2)risesabovereleasevoltage,theoutputpin's(VDET1,VDET2)voltagewillbeequaltothevoltagedependenton
pullup.
Note:Thedifferencebetweenreleasevoltage(VDR)anddetectvoltage(VDF)istheHysteresisRangey.
条件A 条件B
InputVoltage(VIN1)
ReleaseVoltage(VDR1)
DetectVoltage(VDF1)
Min.OperatingVoltage(VMIN)
GroundVoltage(VSS)
InputVoltage(VIN2)
ReleaseVoltage(VDR2)
DetectVoltage(VDF2)
Min.OperatingVoltage(VMIN)
GroundVoltage(VSS)
Min.OperatingVoltage(VMIN)
GroundVoltage(VSS)
OutputVoltage(VDET1)
OutputVoltage(VDET2)
Min.OperatingVoltage(VMIN)
GroundVoltage(VSS)
1345
A
21345
B
2
6
6
6
6
XC612
Series
175
2
02S05XC612 02.09.12 14:15 ページ175