70P2352-IGT Просмотр технического описания (PDF) - Teridian Semiconductor Corporation

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70P2352-IGT

Dual Channel OC-3/ STM1-E/ E4 LIU

Teridian Semiconductor Corporation 

DESCRIPTION

The 78P2352 is Teridian’s second generation Line

Interface Unit (LIU) for 155 Mbps SDH/SONET

(OC-3, STS-3, or STM-1) and 140 Mbps PDH (E4)

telecom interfaces. The device is a dual channel,

single chip solution that includes an integrated CDR

in the transmit path for flexible NRZ to CMI

conversion. The device can interface to 75Ω coaxial

cable using CMI coding or directly to a fiber optics

transceiver module using NRZ coding. The

78P2352 is compliant with all respective ANSI, ITU-

T, and Telcordia standards for jitter tolerance,

generation, and transfer.

APPLICATIONS

• Central Office Interconnects

• DSLAMs

• Add Drop Multiplexers (ADMs)

• Multi Service Switches

• Digital Microwave Radios

78P2352

Dual Channel

OC-3/ STM1-E/ E4 LIU

DATA SHEET

SEPTEMBER 2006

FEATURES

• ITU-T G.703 compliant cable driver for 139.264

Mbps or 155.52 Mbps CMI-coded coax

transmission

• Integrated adaptive CMI equalizer and CDR in

receive path handles over 12.7dB of cable loss

• Serial, LVPECL system interface with integrated

CRU in transmit path for flexible NRZ to CMI

conversion.

• 4-bit parallel CMOS system interface with

master and slave Tx clock modes.

• Selectable LVPECL compatible NRZ media

interface for 155.52 Mbps optical transmission.

• Configurable via HW control pins or 4-wire serial

port interface

• Compliant with ANSI T1.105.03-1994; ITU-T

G.751, G.813, G.823, G.825, G.958; and

Telcordia GR-253-CORE for jitter performance.

• Receiver Loss of Signal (LOS) detection

compatible with ITU-T G.783

• Operates from a single 3.3V supply

• Standard and thermally enhanced 128-pin

JEDEC LQFP package options

BLOCK DIAGRAM

SIxDP/N

SIxCKP/N

PIxCK

PIx[3:0]D

PTOxCK

Lock Detect

Tx CDR

EACH CHANNEL: Tx

FIFO

CMI

Encoder

PMOD, SMOD[1:0], PAR

ECLxP/N

TXxCKP/N

CMIxP/N

RLBK

SOxCKP/N

SOxDP/N

POx[3:0]D

POxCK

CMI

Decoder

Rx CDR

Lock Detect

CMI

EACH CHANNEL: Rx

Adaptive

Eq.

LOS Detect

LLBK

RXxP/N

Page: 1 of 42

2006 Teridian Semiconductor Corporation

Rev. 2.4

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