MT9172

ISO2-CMOS ST-BUS FAMILY MT9171/72 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 (9171) and 4 km (9172) ISDN compatible (2B+D) data format Transparent modem capability Frame synchronization and clock extraction Zarlink ST-BUS compatible Low power (typically 50 mW), single 5V supply DS5130 ISSUE 3 February 1999 Ordering Information MT9171AE 22 Pin Plastic DIP (400 mil) MT9171AN 24 Pin SSOP MT9171AP 28 Pin PLCC MT9172AE 22 Pin Plastic DIP (400 mil) MT9172AN 24 Pin SSOP MT9172AP 28 Pin PLCC -40°C to + 85°C Description 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 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 MT9171/72 is fabricated in Zarlink’s ISO2CMOS process. Appli...