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MT8972BE Datasheet(PDF) 1 Page - Mitel Networks Corporation |
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MT8972BE Datasheet(HTML) 1 Page - Mitel Networks Corporation |
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1 / 20 page  9-107 9-107 ® 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 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 Figure 1 - Functional Block Diagram DSTi/Di CDSTi/ F0/CLD C4/TCK F0o/RCK MS0 MS1 MS2 RegC DSTo/Do CDSTo/ CDo Transmit Interface Prescrambler Scrambler Control Register Transmit/ Clock Receive Timing & Control Status Transmit Timing Master Clock Phase Locked Sync Detect Receive DPLL Receive Interface De- Prescrambler Descrambler Differentially Encoded Biphase Receiver Differentially Encoded Biphase Transmitter Transmit Filter & Line Driver Receive Filter -1 +2 MUX Address Echo Canceller Error Signal Echo Estimate VBias VDD VSS VBias VRef LOUT LOUT DIS Precan LIN OSC2 OSC1 — + ∑ CDi ISSUE 7 May 1995 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 ISO2- CMOS process. 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 MT8971B/72B Digital Subscriber Interface Circuit Digital Network Interface Circuit ISO2-CMOS ST-BUS ™ FAMILY |
Similar Part No. - MT8972BE |
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Similar Description - MT8972BE |
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