MTC20455 datasheet(1/23 Pages) STMICROELECTRONICS

部件名	MTC20455

功能描述	QUAD ADSL DMT TRANSCEIVER

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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MTC20455

February 2004

■ Quad DMT modem ATM framer

■ Supports ANSI T1.413 issue 2, ITU G.992.1,

and G.992.2 standards

■ Low power consumption (1W for four lines)

■ Standard Utopia level 2 ATM interface

■ 160 PQFP Package

■ 160 LFBGA Package

DESCRIPTION

The MTC20455 is the DMT modem and ATM

Framer of the MTK20450 Quad Rate adaptive

ADSL DynaMiTe chipset. When used in conjunc-

tion with the MTC20454 or MTC20154 analog

front-end, the product supports ANSI T1.413 re-

lease 2, ITU G.992.1 and G.992.2 (G.Lite) ADSL

specifications through software configuration. It

provides a cell based UTOPIA Level 2 ATM data

interface.

The MTC20455 performs the DMT modulation,

demodulation, Reed-Solomon encoding, bit inter-

leaving and trellis coding for four ADSL modems.

The ATM section provides framing functions for

the generic and ATM Transmission Convergence

(TC) layers. The generic TC consists of data

scrambling and Reed-Solomon error corrections,

with and without interleaving.

The MTC20455 is controlled and configured by the

MTC20136 Transceiver Controller. All program-

mable coefficients and parameters are loaded by

the Controller. The MTC20136 also controls the

initialisation procedure and performs the monitor-

ing and adaptive functions during operation.

PQFP160

LFBGA160

ORDERING NUMBERS:

Part Numbers

Package

Temperature

MTC20455PQ-I

160 pin PQFP

-40 to +85°C

MTC20455MB-I

160 pin LFBGA

-40 to +85°C

Can also be ordered using kit number MTK20450

QUAD ADSL DMT TRANSCEIVER

Figure 1. Block Diagram

Quad or Mux'd AFE Interface

AFE

UTOPIA Interface

Reset

JTAG

Test

Clocks

Interface Module

DynaMiTe

Core 0

DynaMiTe

Core 1

DynaMiTe

Core 2

DynaMiTe

Core 3

Transceiver

Controller

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