STLC61255 Ver la hoja de datos (PDF) - STMicroelectronics
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STLC61255 Datasheet PDF : 8 Pages
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STLC61255
12 CHANNEL DMT ADSL DATA PUMP
DATA BRIEF
4 MAIN FEATURES
Figure 1. Package
■ Support for 12 independent ports.
■ Low power consumption
■ Category II Functionality: Trellis coding and
Echo cancellation
■ Flexible bin assignment: Supports ADSL over
POTS, ADSL over ISDN, all digital loop and
overlapping spectra.
■ TC layer supporting: ATM TC
■ No external memory needed for Interleave
memory nor modem SW
■ No real time requirements from the controller
■ Each modem can be different phase (startup/
Showtime) independently of other modems
■ Package: PBGA676 27x27mm
■ 0.13um CMOS technology
■ 1.2V core logic supply (3.3V for I/O)
■ -40ºC to +85ºC operation
5 DESCRIPTION
The STLC61255 twelve channels ADSL Transceiver
is the key component for Asymmetrical Digital Sub-
scriber Line (ADSL) Central Office modem imple-
mentation. The highly integrated device supports
category II ADSL functionalities, including trellis cod-
ing and echo cancellation. The device embodies 6 in-
dependent dual transceivers optimized for Central
Office operation, with bit rates of up to 3.0 Mbps up-
PBGA676 (27 x 27mm)
Table 1. Order Codes
Part Number
STLC61255
Package
PBGA676
stream and 24 Mbps downstream. This device is ide-
al for power and area sensitive Central Office
equipment, providing highest performance and den-
sity while meeting all telecom grade equipment re-
quirements. The STLC61255 is designed for minimal
host controller intervention during runtime operation.
Combining this feature with additional management
interfaces such as the serial host interface and the In-
band Utopia management interface provides many
alternatives for designs that significantly reduce op-
eration complexity and cost. Cost saving can be
achieved by using a singe low-cost controller to sup-
port high-density line-cards, saving the need for on-
board flash memory or even the entire host proces-
sor environment. The STLC61255 host interface pro-
vides a full sup-port of the ADSL MIB, and a rich set
of statistic information and programmable fault
alarms.
June 2004
3/8
This is preliminary information on a new product foreseen to be developed. Details are subject to change without notice.
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