L3845

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...

floor Price/Ceiling Price

Part Number:
L3845
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/12/26

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Product Details

Description



Features:

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



Specifications

Symbol
Parameter
Value
Unit
VL
MaxLineVoltage(pulseduration10msmax)
20
V
IL
MaxLineCurrent
150
mA
Ptot
TotalPowerDissipationatTamb=70C

800

W
Top
OperatingTemperature
-40to70

Tsrg,Tj
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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