MT9076AB Просмотр технического описания (PDF) - Mitel Networks

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MT9076AB

T1/E1/J1 3.3V Single Chip Transceiver

Mitel Networks 

MT9076

Preliminary Information

Digital Framer Mode

• The LIU can be disabled and bypassed to allow the MT9076 to be used as a digital framer

• Single phase NRZ or two phase NRZ modes are software selectable

• Line coding is software selectable

Phase Lock Loop

• Locks to a 4.096 MHz input clock, or to the 1.544MHz / 2.048MHz extracted clock

• IMA mode locks to 1,544MHz or 2,048MHz external clock

• Attenuates jitter from less than 2.5 Hz with a roll off of 20 dB/decade

• Attenuates jitter in the transmit or receive direction

• Intrinsic jitter less than 0.02 UI

• Meets the jitter characteristics as specified in AT&T TR62411

• Meets the jitter characteristics as specified in ETS 300 011

• Can be operated in Free-run, Line Synchronous or System Bus Synchronous modes

Access and Control

• MT9076 registers can be accessed via an 8-bit non-multiplexed parallel microprocessor port

• The parallel port can be configured for Motorola or Intel style control signals

Backplane Interfaces

• 2.048Mbit/s or 8.192Mbit/s ST-BUS

• IMA mode, 1.544Mbit/s (T1) or 2.048Mbit/s (E1) serial bus with asynchronous transmit and receive

timing for Inverse MUX for ATM (IMA) applications. Slip buffers are bypassed and signaling is disabled.

• CSTo/CSTi pins can be used to access the receive/transmit signaling data

• RxDL pin can be used to access the entire B8ZS/HDB3 decoded receive stream including framing bits

• TxDL pin can be used to transmit data on the FDL (T1) or the Sa bits (E1)

T1/J1 Mode

• PCM-24 channels 1-24 are mapped to ST-

BUS channels 0-23 respectively

• The framing-bit is mapped to ST-BUS

channel 31

E1 Mode

• PCM-30 timeslots 0-31 are mapped to ST-

BUS channels 0-31 respectively

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