Digital Subscriber Interface Circuit 28-Pin PLCC Tube

The MT9171 (DSIC) and MT9172 (DNIC) are pins for pin compatible replacements for the MT8971 and MT8972, respectively. They are multi-functional 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" is used to reference both devices unless otherwise noted. The MT9171/72 is fabricated in Microsemi ISO2-CMOS process.

• Full-duplex transmission over a single twisted pair
• Selectable 80 or 160 kbit/s line rate
• Adaptive echo cancellation
• Up to 3 km (9171) and 4 km (9172)
• Integrated services digital network (ISDN) compatible (2B+D) data format
• Transparent modem capability
• Frame synchronization and clock extraction
• Microsemi® ST-BUS compatible
• Low power (typically 50 mW), single 5 V supply