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CO 12-port ADSL, ADSL+, ADSL++, ADSL2+ PHY
Overview
The Maximus CT-L76SC12 CO chipset is a complete, high-performance, 12-port
solution for low-power, high-density, ATU-C line card applications. Building upon
many years of ADSL deployment experience, Maximus is the sixth generation
Centillium Communications ADSL CO chipset. With its low power and extensive
feature set, it is the ideal engine for advanced, state-of-the-art line cards for DSLAM,
MTU/MDU, DLC, and MSAP equipment. Maximus incorporates multiple interfaces
and the Centillium eXtremeDSLTM technology, making it the solution of choice for
high-speed, multi-service line card platforms catering to derived voice and video
services applications.
Maximus 12-port ADSL block diagram
Maximus CT-L76SC12
Features
Twelve-port ADSL modem chipset for
high-density, low-power ATU-C applications
based on two monolithic dies (digital and
AFE package)
Single ADSL chipset platform to enable data,
telephony, and video applications over DSL
Each port is capable of supporting up to
50Mbps downstream and up to 3Mbps
upstream rates
Intelligent mode selection enables CO and
CPE train to the optimal performance mode
Single ADSL chipset solution programmable
for various annexes and regional global
markets
Supports ADSL2 feature set
Support for eXtremeDSL
MAX
Technology
Quad Spectrum (MAX-QS)
Double Spectrum (MAX-DS)
Extended Upstream (MAX-EU)
High Bit Loading (MAX-HBL)
Long Reach (MAX-LR)
Consisting of a single 12-port digital processor and a single 12-port analog front-end,
the Maximus chipset provides a low chip-count solution for high-density line cards.
The CT-L76DC12 digital processor provides programmability and high performance
for long-lasting line card solutions. The CT-L55AC12 analog front-end is a highly
integrated device that significantly reduces the requirements on external components,
resulting in a reduced system bill of materials. Its high-resolution analog-to-digital
and digital-to-analog converter circuits provide the performance required for high
data-rate applications.
TM
47211 Lakeview Blvd., Fremont, CA 94538
Tel: (510) 771-3700
Fax: (510) 771-3500
Email: info@centillium.com
Web: www.centillium.com
Disclaimer: The information in this document is intended to help you evaluate this product. Centillium Communications makes no warranty either express or implied, as to any product or information herein listed, and
reserves the right to change or discontinue work on this product without notice. Trademarks: The company and product names mentioned in this document may be the trademarks or registered trademarks of their
manufacturers. Centillium, Centillium Communications, Maximus, Lugh, Centillium eXtreme DSL, CopperFlite, and the Centillium logo are trademarks of Centillium Communications, Inc.
Part Ordering Information
Product
Maximus
Chipset
CT-L76SC12
Function
Digital chip
Analog chip
Part Number
CT-L76DC12
CT-L55AC12
Package
456-pin PBGA
324-ball PBGA
Note: The chipset must be ordered in sets. Orders of individual components are filled
as chipset orders.
Standards
ITU-T G.992.1 (G.dmt) Annexes A, B, C, H, I, J
G.992.2 (G.lite) Annex A and C
G.992.3 (ADSL2), Annex A (and C when ratified)
G.992.5 (ADSL2 plus)
G.994 (G.hs), G.997.1 (G.ploam)
ANSI T1-413 Issue 2
Support for long-reach solutions (READSL)
Highlights
Leading-edge process technology for
ultra-low power consumption & performance
Simplified and very low cost hybrid BOM
Intelligent power management feature set
Utopia level 2 with up to 50Mhz speed
IBC (In-band Control) feature which allows
the control plane (i.e., initialization,
programming, and control) of the chipset
to be accessed via data path (i.e., Utopia)
Flexible framing scheme compliant to
ADSL2 specifications
No external memory required
Glueless interface to various host processors
JTAG (IEEE 1149.1) boundary scan
-40C to +85C operation
eXtremeDSL
MAX
Feature Set
Quad Spectrum
(MAX-QS)
Double Spectrum
(MAX-DS)
Extended Upstream
(MAX-EU)
High Bit Loading
(MAX-HBL)
Max Long Reach
(MAX-LR)
Remarks
Enables delivery of ADSL down-
stream rates of up to 50Mbps
using Quad Spectrum mode
Uses frequency spectrum from
138Khz to 3.75Mhz for
downstream
Enables delivery of ADSL down-
stream rates of up to 24Mbps
using Double Spectrum mode
Uses frequency spectrum from
138Khz to 2.2Mhz for downstream
Enables delivery of ADSL upstream
rates of up to 3Mbps using
Extended Spectrum mode
Uses frequency spectrum from
25Khz to 276Khz for upstream
Enables ADSL DMT bit loading of
more than 15 bits per tone
Enables delivery of ADSL service
with reasonable rate up to
22,000 ft. (7,000 m)
Benefits
"Video-rates" with ADSL technology: Up to
50Mbps downstream for delivery of video type
services for short loops
Service coverage area extension for premium
services: Increase ADSL2plus reach for 24Mbps
service by 700% (under 24 disturber noise
conditions)
ADSL2plus technology: Up to 24Mbps
downstream for video type services for
short-medium loops
Service coverage area extension for premium
services: Increase ADSL reach for 12Mbps service
by 700% (under 24 disturber noise conditions)
Higher upstream rate for ADSL power users:
Up to 3Mbps upstream for peer to peer
applications
Enables delivery of higher bit rate with increased
bit loading: up to 20% increase in rates
Extended ADSL service coverage for long-loop
subscribers: 20% increase in ADSL reach
Maximus chipset supports ADSL2 (recently standardized by ITU-T) including the new
training and framing scheme. The device is backward compatible to existing deployed
ADSL solutions. In addition, Maximus supports Centillium's innovative eXtremeDSL-max
technology feature set which aims at maximizing the use of ADSL spectrum to deliver
more bandwidth and extend the reach of ADSL service.
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