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AM79489

Part Number	AM79489
Manufacturer	Legerity
Description	Subscriber Line Interface Circuit
Published	Sep 8, 2005
Detailed Description	Am79489 Subscriber Line Interface Circuit DISTINCTIVE CHARACTERISTICS Ideal for low power sensitive ...
Datasheet	AM79489 PDF File

Overview

Am79489 Subscriber Line Interface Circuit DISTINCTIVE CHARACTERISTICS Ideal for low power sensitive applications Low standby power (normal and reverse) Automatic on-chip battery switching On-chip thermal management On-chip thermal shutdown –20 V to –60 V battery operation Programmable current limit Programmable resistive feed Programmable loop-detect threshold Selectable overhead for metering applications Two-wire impedance set by single external impedance On-chip ring and test relay drivers and relay snubber circuits Polarity reversal (full transmission) Loop and ground-key detector Comparator for ring-trip detection Ground-start capability On-hook transmission BLOCK DIAGRAM TMG DA DB Test Relay Driver Ring Relay Driver TESTOUT RINGOUT A(TIP) C1 HPA Two-Wire Interface Ring-Trip Comparator Ground-Key Detector Loop Detector Input Decoder and Control C2 C3 C4 E1 HPB B(RING) Signal Transmission Power-Feed Controller Switch Control DET RD VTX ...

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