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MT8971B

Mitel Networks Corporation
Part Number MT8971B
Manufacturer Mitel Networks Corporation
Description (MT8972B) ISO2-CMOS ST-BUS FAMILY Digital Subscriber Interface Circuit Digital Network Interface Circuit
Published Sep 11, 2005
Detailed Description ® ISO2-CMOS ST-BUS™ FAMILY MT8971B/72B Digital Subscriber Interface Circuit Digital Network Interface Circuit Features...
Datasheet PDF File MT8971B PDF File

MT8971B
MT8971B


Overview
® ISO2-CMOS ST-BUS™ FAMILY MT8971B/72B Digital Subscriber Interface Circuit Digital Network Interface Circuit Features • • • • • • • • • Full duplex transmission over a single twisted pair Selectable 80 or 160 kbit/s line rate Adaptive echo cancellation Up to 3km (8971B) and 4 km (8972B) ISDN compatible (2B+D) data format Transparent modem capability Frame synchronization and clock extraction MITEL ST-BUS compatible Low power (typically 50 mW), single 5V supply ISSUE 7 May 1995 Ordering Information MT8971BE 22 Pin Plastic DIP MT8972BE 22 Pin Plastic DIP MT8972BC 22 Pin Ceramic DIP MT8971BP 28 Pin PLCC MT8972BP 28 Pin PLCC -40°C to + 85°C Description The MT8971B (DSIC) and MT8972B (DNIC) are multi-function devices capable of providing high speed, full duplex digital transmission up to 160 kbit/s over a twisted wire pair.
They use adaptive echo-cancelling techniques and transfer data in (2B+D) format compatible to the ISDN basic rate.
Several modes of operation allow an easy interface to digital telecommunication networks including use as a high speed limited distance modem with data rates up to 160 kbit/s.
Both devices function identically but with the DSIC having a shorter maximum loop reach specification.
The generic "DNIC" will be used to reference both devices unless otherwise noted.
The MT8971B/72B is fabricated in Mitel’s ISO 2CMOS process.
Applications • • • • Digital subscriber lines High speed data transmission over twisted wires Digital PABX line cards and telephone sets 80 or 160 kbit/s single chip modem DSTi/Di CDSTi/ CDi Transmit Interface Prescrambler Scrambler Differentially Encoded Biphase Transmitter Transmit Filter & Line Driver LOUT F0/CLD C4/TCK F0o/RCK MS0 MS1 MS2 RegC Control Register Transmit Timing VBias Address Echo Canceller Error Signal Echo Estimate — DPLL MUX LOUT DIS Master Clock Phase Locked Transmit/ Clock Receive Timing & Control Sync Detect Status Receive Precan ∑ + Receive Filter -1 +2 LIN OSC2 DSTo/Do CDST...


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