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