MT9075BL1

1. Description

The MT9075BL1 is a single chip device which integrates an advanced PCM 30 framer with a Line Interface Unit (LIU). The framer interfaces to a 2.048 Mbit/s backplane and provides selectable rate data link access with optional HDLC controllers for Sa bits and channel 16. The LIU interfaces the framer functions to the PCM 30 transformer-isolated four wire line.

2. Features

    1. Combined PCM 30 framer, Line Interface Unit (LIU) and link controllers in a 68 pin PLCC or 100 pin MQFP package

    2. Selectable bit rate data link access with optional Sa bits HDLC controller (HDLC0) and channel 16 HDLC controller (HDLC1)

    3. LIU dynamic range of 20 dB

    4. Enhanced performance monitoring and programmable error insertion functions

    5. Low jitter DPLL for clock generation

    6. Operating under synchronized or free run mode

    7. Two-frame receive elastic buffer with controlled slip direction indication

    8. Selectable transmit or receive jitter attenuator

    9. Intel or Motorola non-multiplexed parallel microprocessor interface

  10. CRC-4 updating algorithm for intermediate path points of a message-based data link application

  11. ST-BUS/GCI 2.048 Mbit/s backplane bus for both data and signalling

3. Applications

    1. E1 add/drop multiplexers and channel banks

    2. CO and PBX equipment interfaces

    3. Primary Rate ISDN nodes

    4. Digital Cross-connect Systems (DCS)

4. Pin Description