MT8931B MITEL | Alldatasheet

Document overview

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Technical content

Features

  • CCITT I.430 and ANSI T1.605 S/T interface
  • Full-duplex 2B+D, 192 kbit/s transmission
  • Link activation/deactivation
  • D-channel access contention resolution
  • Point-to-point, point-to-multipoint and star configurations
  • Master (NT)/Slave (TE) modes of operation
  • Exceeds loop length requirements
  • Complete loopback testing capabilities
  • On chip HDLC D-channel protocoller
  • 8 bit Motorola/Intel microprocessor interface
  • Microprocessor-controlled operation
  • Mitel ST -BUS interface
  • Low power CMOS technology
  • Single 5 volt power supply

Applications

  • ISDN NT1
  • ISDN S or T interface
  • ISDN Terminal Adaptor (TA)
  • Digital sets (TE1) - 4 wire ISDN interface
  • Digital PABXs, Digital Line Cards (NT2)

Description

The MT8931B Subscriber Network Interface Circuit (SNIC) implements the CCITT I.430 and ANSI T1.605 Recommendations for the ISDN S and T reference points. Providing point-to-point and point- to-multipoint digital transmission, the SNIC may be used at either end of the subscriber line (NT or TE). An HDLC D-channel protocoller is included and controlled through a Motorola/Intel microprocessor port. The MT8931B is fabricated in Mitel’s CMOS process. Figure 1 - Functional Block Diagram DSTi DSTo F0od C4b F0b STAR/ Rsto XTAL1/NT XTAL2/NC LTx VBias LRx VDD VSS ST -BUS Interface Timing and Control D-channel Priority Mechanism PLL HDLC Transceiver S-Bus Link Interface Link Activation Controller Microprocessor Interface Rsti HALF AD0-7 R/ W/WR DS/ RD AS/ALE CS IRQ/NDA

Ordering Information

MT8931BC 28 Pin Ceramic DIP MT8931BE 28 Pin Plastic DIP MT8931BP 44 Pin PLCC -40°C to +85°C ISSUE 2 August 1993 MT8931B Subscriber Network Interface Circuit Preliminary Information CMOS ST -BUS FAMIL Y

MT8931B Preliminary Information 10-72 Notes:

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