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 microprocessor interface.

FEATURES

♦ Integrates 16 channels E1 short haul line interface units for 120 Ω E1 twisted pair cable and 75 Ω E1 coaxial cable applications

♦ Per-channel configurable Line Interface options

   • Fully integrated and software selectable receive and transmit termination

     – Option 1: Fully Internal Impedance Matching with integrated receive termination resistor

     – Option 2: Partially Internal Impedance Matching with common external resistor for improved device power dissipation

     – Option 3: External impedance Matching termination

   • Supports global configuration and per-channel configuration to E1 mode

♦ Per-channel programmable features

   • Provides E1 short haul waveform templates and user programmable arbitrary waveform templates

   • Provides two JAs (Jitter Attenuator) for each channel of receiver and transmitter

   • Supports AMI/HDB3 (for E1) encoding and decoding

♦ Per-channel System Interface options

   • Supports Single Rail, Dual Rail with clock or without clock and sliced system interface

   • Integrated Clock Recovery for the transmit interface to recover transmit clock from system transmit data

♦ Per-channel system and diagnostic functions

   • Provides transmit driver over-current detection and protection with optional automatic high impedance of transmit interface

   • Detects and generates PRBS (Pseudo Random Bit Sequence), ARB (Arbitrary Pattern) and IB (Inband Loopback) in either receive or transmit direction

   • Provides defect and alarm detection in both receive and transmit directions.

     – Defects include BPV (Bipolar Violation) /CV (Code Violation) and EXZ (Excessive Zeroes)

     – Alarms include LLOS (Line LOS), SLOS (System LOS), TLOS (Transmit LOS) and AIS (Alarm Indication Signal)

   • Programmable LLOS detection /clear levels. Compliant with ITU and ANSI specifications

   • Various pattern, defect and alarm reporting options

     – Serial hardware LLOS reporting (LLOS, LLOS0) for all 16 channels

     – Register access to individual registers or 16-bit error counters

   • Supports Analog Loopback, Digital Loopback and Remote Loopback

   • Supports line monitor

♦ Hitless Protection Switching (HPS) without external Relays

   • Supports 1+1 and 1:1 hitless protection switching

   • Asynchronous hardware control (OE, RIM) for fast global high impedance of receiver and transmitter (hot switching between working and backup board)

   • High impedance transmitter and receiver while powered down

   • Per-channel register control for high impedance, independent for receiver and transmitter

♦ Clock Inputs and Outputs

   • Flexible master clock (N x 1.544 MHz or N x 2.048 MHz) (1 ≤ N ≤ 8, N is an integer number)

   • Integrated clock synthesizer can multiply or divide the reference clock to a wide range of frequencies: 8 KHz, 64 KHz, 2.048 MHz, 4.096 MHz, 8.192 MHz, 19.44 MHz and 32.768 MHz

♦ Microprocessor Interface

   • Supports Serial microprocessor interface

♦ Other Key Features

   • IEEE1149.1 JTAG boundary scan

   • Two general purpose I/O pins

   • 3.3 V I/O with 5 V tolerant inputs

   • 3.3 V and 1.8 V power supply

   • Package: 484-pin Fine Pitch BGA (19 mm X 19 mm)

♦ Applicable Standards

   • Bellcore TR-TSY-000009, GR-253-CORE and GR-499-CORE

   • ETSI CTR12/13

   • ETS 300166 and ETS 300 233

   • G.703, G.735, G.736, G.742, G.772, G.775, G.783 and G.823

   • O.161

APPLICATIONS

♦ SDH/SONET multiplexers

♦ Central office or PBX (Private Branch Exchange)

♦ Digital access cross connects

♦ Remote wireless modules

♦ Microwave transmission systems