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LTV-814-A
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LTV-814-A数据手册
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Rev. 1.32 1 January 19, 2016 Rev. 1.00 PB January 19, 2016
BS812A-1/BS813A-1/BS814A-1/BS814A-2
BS816A-1/BS818A-2/BS8112A-3/BS8116A-3
Touch Key
Features
• Operatingvoltage:2.2V~5.5V
• Lowstandbycurrent
• Auto-calibration
•
Reliabletouchdetections
• Standbyandnormaloperatingmodes
• Maximumkeyondurationtimedetection
• Adaptivevoltagedropfunction
• LevelHold,selectableactivelevel-loworhigh
• NMOSoutputwithinternalpull-high/CMOS-
DirectOutput
• Bothserialinterfaceandparalleloutputs
• Sensitivityadjustmentusinganexternalcapacitor
• Minimalnumberofexternalcomponents
General Description
TheBS81xisaseriesof2~16keytouchkeydevices
whichcandetecthumanbodycontactusingexternal
touchpads.Thehighlevelofdeviceintegration
enableapplicationstobeimplementedwitha
minimumnumberofexternalcomponents.
TheBS81xseriesdevicesareequippedwithserialor
parallelinterfacestoalloweasycommunicationwith
anexternalMCUfordevicesetupandfortouchpin
monitoringpurposes.Specialinternalcircuitryisalso
employedtoensureexcellentpowernoiserejectionto
reducethepossibilityoffalsedetections,increasing
thetouchswitchapplicationreliabilityunderadverse
environmentalconditions.
Withauto-calibration,lowstandbycurrent,excellent
resistancetovoltagefluctuationandotherfeatures,
thisrangeoftouchkeydevicesprovideasimpleand
effectivemeansofimplementingtouchkeyoperation
inawidevarietyofapplications.
Selection Table
Forthisdeviceseries,mostofthefeaturearesimilar.TheBS8112A-3andBS8116A-3provideI
2
Cfunction.
TheBS814A-2andBS818A-2includeaserialinterfacefunctionwhiletheBS812A-1,BS813A-1,BS814A-1
andBS816A-1haveparalleloutputs.MeanwhiletheBS8112A-3andBS8116A-3cansetupsomeoptionsand
thesensitivitythroughtheI
2
CcommunicationinterfaceandtheBS816A-1andBS818A-2includetwohardware
options.Thefollowingtablesummarizesthemaincharacteristicsofeachdevice.
Part. No.
Touch
Key
Option Istb@3V Parallel Outputs
Serial
Interface
Power Mode
Auto
Calibration
Package
BS812A-1 2-Key × 2.0μA
NMOS
(internal pull-high)
×
Normal and
Standby
SOT23-6
BS813A-1 3-Key × 4.5μA × 8SOP
BS814A-1 4-Key × 5.0μA × 10MSOP
BS814A-2 4-Key × 5.0μA × 8SOP
BS816A-1 6-Key OMS/LSC
(Note 1)
12μA/6μA
NMOS
(internal pull-high)/
CMOS-Direct
× 16NSOP
BS818A-2 8-Key OMS/LSC
(Note 1)
12μA/6μA Binary 16NSOP
BS8112A-3 12-Key Note 2 13μA/3μA × I
2
C 16NSOP
BS8116A-3 16-Key Note 2 17μA/3.5μA × I
2
C 20SOP/SSOP
Note:1.RefertotheOMS/LSCOptiontable.
2.RefertotheI
2
COptiontable.

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