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IDT82P2828 Datasheet(PDF) 11 Page - Integrated Device Technology |
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IDT82P2828 Datasheet(HTML) 11 Page - Integrated Device Technology |
11 / 154 page IDT82P2828 28(+1) CHANNEL HIGH-DENSITY T1/E1/J1 LINE INTERFACE UNIT Applications 11 January 11, 2007 APPLICATIONS SDH/SONET multiplexers Central office or PBX (Private Branch Exchange) Digital access cross connects Remote wireless modules Microwave transmission systems DESCRIPTION The IDT82P2828 is a 28+1 channels high-density T1/E1/J1 short haul Line Interface Unit. Each channel of the IDT82P2828 can be inde- pendently configured. The configuration is performed through a Serial or Parallel Intel/Motorola Non-Multiplexed /Multiplexed microprocessor 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 T1/ E1/J1 waveform standards, five preset T1 templates and two E1 templates, as well as an arbitrary waveform generator are provided. The data through the Waveform Shaper, the Line Driver and the Tx Trans- mitter 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. Channel 0 is a special channel. Besides normal operation as the other 28 channels, channel 0 also supports G.772 Monitoring and Jitter Measurement per ITU O.171. A line monitor function per T1.102 is available to provide a Non-Intru- sive Monitoring of channels of other devices. JTAG per IEEE 1149.1 is also supported by the IDT82P2828. |
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