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IDT82P20516

16-Channel Short Haul E1 Line Interface Unit

Integrated Device Technology 

16-Channel

Short Haul E1 Line Inter-

face Unit

IDT82P20516

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

IDT and the IDT logo are trademarks of Integrated Device Technology, Inc.

8

 2009 Integrated Device Technology, Inc.

December 17, 2009

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