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AM79M574

Legerity
Part Number AM79M574
Manufacturer Legerity
Description Metering Subscriber Line Interface Circuit
Published Feb 26, 2007
Detailed Description www.DataSheet4U.com Am79M574 Metering Subscriber Line Interface Circuit DISTINCTIVE CHARACTERISTICS       Progr...
Datasheet PDF File AM79M574 PDF File

AM79M574
AM79M574

Overview
www.
DataSheet4U.
com Am79M574 Metering Subscriber Line Interface Circuit DISTINCTIVE CHARACTERISTICS       Programmable constant-resistance feed Programmable loop-detect threshold Ground-key detect Performs polarity reversal Line-feed characteristics independent of battery variations Test relay driver optional      Supports 2.
2 Vrms metering (12 and 16 kHz) On-chip switching regulator for low-power dissipation Two-wire impedance set by single external impedance Tip Open state for ground-start lines On-hook transmission BLOCK DIAGRAM Ring Relay Driver A(TIP) Test Relay Driver Ground-Key Detector HPA Two-Wire Interface HPB Signal Transmission Off-Hook Detector B(RING) DA DB VREG L VBAT BGND CHS QBAT CHCLK VCC VEE AGND 16857C-001 RINGOUT TESTOUT C1 C2 C3 C4 E1 E0 DET Input Decoder and Control VTX RSN Power-Feed Controller Ring-Trip Detector RD RDC Switching Regulator Notes: 1.
Am79M574—E0 and E1 inputs; ring and test relay drivers sourced internally to BGND.
2.
Curr...


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