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IDT82P20516

16-Channel Short Haul E1 Line Interface Unit

Integrated Device Technology 

IDT82P20516

16-CHANNEL SHORT HAUL E1 LINE INTERFACE UNIT

APPLICATIONS

‹ SDH/SONET multiplexers

‹ Central office or PBX (Private Branch Exchange)

‹ Digital access cross connects

‹ Remote wireless modules

‹ Microwave transmission systems

DESCRIPTION

The IDT82P20516 is a 16-channel high-density E1 short haul Line

Interface Unit. Each channel of the IDT82P20516 can be independently

configured. The configuration is performed through a Serial micropro-

cessor interface.

In the receive path, through a Single Ended or Differential line inter-

face, the received signal is processed by an adaptive Equalizer and then

sent to a Slicer. Clock and data are recovered from the digital pulses

output from the Slicer. After passing through an enabled or disabled

Receive Jitter Attenuator, the recovered data is decoded using B8ZS/

AMI/HDB3 line code rule in Single Rail NRZ Format mode and output to

the system, or output to the system without decoding in Dual Rail NRZ

Format mode and Dual Rail RZ Format mode.

In the transmit path, the data to be transmitted is input on TDn in

Single Rail NRZ Format mode or TDPn/TDNn in Dual Rail NRZ Format

mode and Dual Rail RZ Format mode, and is sampled by a transmit

reference clock. The clock can be supplied externally from TCLKn or

recovered from the input transmit data by an internal Clock Recovery. A

selectable JA in Tx path is used to de-jitter gapped clocks. To meet E1

waveform standards, two E1 templates and one J1 template, as well as

an arbitrary waveform generator are provided. The data through the

Waveform Shaper, the Line Driver and the Tx Transmitter is output on

TTIPn and TRINGn.

Alarms (including LOS, AIS) and defects (including BPV, EXZ) are

detected in both receive line side and transmit system side. AIS alarm,

PRBS, ARB and IB patterns can be generated /detected in receive /

transmit direction for testing purpose. Analog Loopback, Digital Loop-

back and Remote Loopback are all integrated for diagnostics.

JTAG per IEEE 1149.1 is also supported by the IDT82P20516.

Applications

9

December 17, 2009

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