MTC20455 Datasheet, PDF (1/23 Pages) STMicroelectronics – QUAD ADSL DMT TRANSCEIVER

MTC20455
QUAD ADSL DMT TRANSCEIVER
■ 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
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
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.
Figure 1. Block Diagram
AFE
Reset
JTAG
Test
Clocks
Quad or Mux'd AFE Interface
DynaMiTe
Core 0
DynaMiTe
Core 1
DynaMiTe
Core 2
DynaMiTe
Core 3
Interface Module
Transceiver
Controller
UTOPIA Interface
February 2004
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