L3845 Selling Leads, Price trend, L3845 DataSheet download, circuit diagram from SeekIC.com

Features: ·ONCHIPPOLARITYGUARD·MEETSDCLINECHARACTERISTICSOF ITHERCCITTANDEIARS464SPECS·PULSEFUNCTION·HIGHACIMPEDANCE·OFFHOOK-STATUSDETECTIONOUTPUT·LOWEXTERNALCOMPONENTCOUNTSpecifications Symbol Parameter Value Unit VL MaxLineVoltage(pulseduration10msmax) 20 V I...

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SeekIC No. : 004389109 Detail

L3845: Features: ·ONCHIPPOLARITYGUARD·MEETSDCLINECHARACTERISTICSOF ITHERCCITTANDEIARS464SPECS·PULSEFUNCTION·HIGHACIMPEDANCE·OFFHOOK-STATUSDETECTIONOUTPUT·LOWEXTERNALCOMPONENTCOUNTSpecifications Symb...

L3845 Data Sheet

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Part Number:: L3845
Supply Ability:: 5000

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Upload time: 2025/12/17

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Product Details

Description

Features:

·ONCHIPPOLARITYGUARD
·MEETSDCLINECHARACTERISTICSOF ITHERCCITTANDEIARS464SPECS
·PULSEFUNCTION
·HIGHACIMPEDANCE
·OFFHOOK-STATUSDETECTIONOUTPUT
·LOWEXTERNALCOMPONENTCOUNT

Specifications

Symbol	Parameter	Value	Unit
V_L	MaxLineVoltage(pulseduration10msmax)	20	V
I_L	MaxLineCurrent	150	mA
P_tot	TotalPowerDissipationatTamb=70C	800	W
T_op	OperatingTemperature	-40to70
T_srg,T_j	StorageandJunctionTemperature	-55to15

Description

ThecircuitprovidesDCloopterminationforana- ogtrunklines.

TheV-Icharacteristicsisequivalenttoafixed oltagedrop(zenerlikecharacteristic)inseries i hanexternalresistancethatdeterminesthe lopeoftheDCcharacteristic.

Anexternallowvoltageelectrolyticcapacitor ausesthecircuittoexhibitaveryhighimped- ncetoallACsignalaboveaminimumfrequency thatisdeterminedbythecapacitoritselfandbya 20Knominalresistorintegratedonthechip.
TheOff-Hookstatusisdetectedallthetimea ypicof8mAisflowingintothecircuit.Inthiscon- L3845 ionaconstantcurrentgeneratorisactivatedtosupplyanexternaldevice(typicallyanoptocou- ler)withoutaffectingtheACcharacteristicofthe ircuit.

WhenPulse L3845 DialingisrequiredthePULSEinput pin3)connectedtoV-causesthedevicetore- ucethefixedDCvoltagedropandtoexhibita ureresistiveimpedanceequaltotheexternalre- istor.

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L3845

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