MT9172
2 Wire Full-Duplex 2B+D (80/160 Kbps) Data Format Digital Subscriber Network Interface Circuit (range up to 4 KM)
Overview
| The MT9171 (DSIC) and MT9172 (DNIC) are pin for pin compatible replacements for the MT8971 and MT8972, respectively. They are multi-function devices capable of providing high speed, full duplex digital transmission up to 160 kbps 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 kbps. 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. |
Detailed Block Diagram
Typical Applications
- Digital subscriber lines
- High speed data transmission over twisted wires
- Digital PABX line cards and telephone sets
- 80 or 160 kbps single chip modem
Features & Benefits
- Full duplex transmission over a single twisted pair
- Selectable 80 or 160 kbps line rate
- Adaptive echo cancellation
- Up to 3 km (9171) and 4 km (9172)
- ISDN compatible (2B+D) data format
- Transparent modem capability
- Frame synchronization and clock extraction
- Low power (typically 50 mW), single 5 V supply
Resources
Documentation
Application Notes
- MSAN-128 - Implementing an ISDN Architecture using the ST-BUS.pdf
- MSAN-124 - MT9171/72 DNIC Application Circuits.pdf
- MSAN-122 - Approaches to Digital Line Card Design.pdf
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