Motor de Búsqueda de Datasheet de Componentes Electrónicos
  Spanish  ▼
ALLDATASHEET.ES

X  

ST70134-ST70135A Datasheet(PDF) 2 Page - STMicroelectronics

No. de pieza ST70134-ST70135A
Descripción Electrónicos  ASCOT ADSL MODEM CHIP SET FOR CPE
Download  8 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST70134-ST70135A Datasheet(HTML) 2 Page - STMicroelectronics

  ST70134-ST70135A Datasheet HTML 1Page - STMicroelectronics ST70134-ST70135A Datasheet HTML 2Page - STMicroelectronics ST70134-ST70135A Datasheet HTML 3Page - STMicroelectronics ST70134-ST70135A Datasheet HTML 4Page - STMicroelectronics ST70134-ST70135A Datasheet HTML 5Page - STMicroelectronics ST70134-ST70135A Datasheet HTML 6Page - STMicroelectronics ST70134-ST70135A Datasheet HTML 7Page - STMicroelectronics ST70134-ST70135A Datasheet HTML 8Page - STMicroelectronics  
Zoom Inzoom in Zoom Outzoom out
 2 / 8 page
background image
ST70134 - ST70135A
2/8
GENERAL DESCRIPTION
The ADSL modem chip set with ATM interface
provides all the active functions required to build a
complete ATM-based ADSL modem from line
interface to ATM UTOPIA bus. The chip set
employs
Discrete
MultiTone
modulation
as
specified in ANSI T1.413.
The chip set operates at CPE end of the loop
(ATU-R mode).
Reed-Solomon forward error
correction plus Trellis coding with or without
interleaving in internal interleaving RAM provides
maximum noise immunity (see Figure 3).
Interleaving
is
optional
and
can
be
used
simultaneously on a slow channel (e.g., for data or
control info) while a fast channel (e.g., video)
operates without interleaving. ICs include rate
adaptation capabilities during show time.
In transmit direction the chip set allows to select
an attenuation of the signal in case of short loops
or large echo (politeness). In receive direction the
chip set can optionally control an external
multiplexer to select an external attenuation of the
signal in case of short loops, and provide a 2-bit
output external gain control.
ASCOT chip set
ASCOT is a two-chip ADSL modem transceiver.
STMicroelectronics
provides
the
necessary
software for transceiver’s external controller.
ASCOT can easily be hooked up with ATM
systems through the built-in UTOPIA level 2/1
interface. That allows ATM traffic to be carried at
up to 8Mbit/s downstream and 1Mbit/s upstream,
over a very plain and widespread twisted pair.
ASCOT is intended for use at ATU-R end.
The modem control software can be compiled as
C++ code, independently on the processor used.
The driver can be interfaced to any external real
time operating system.
These pages block diagrams show the main
functions built-in in ST70134 and ST70135A.
ASCOT chip set supports three different rate
adaptation modes: fixed rate adaptation mode,
fixed with capability to boost within fixed range,
dynamic rate adaptation during show time.
Modem’s performances are set by the following
parameters: Rate adaptation mode, Downstream
and Upstream bit rate for both latency paths,
Noise margins (min, max and target typically at
10E-7 BER without RS, interleaving and trellis),
Maximum power spectral density for downstream,
Maximum power for both up and downstream,
Carrier
mask
(which
tones
are
disabled),
maximum interleaving delay.
Tones from number 8 to number 255 can be used:
from 8 to 31 for upsteam signals and from 32 to
255 for downstream signals. Numbers 16 and 64
(96 for ADSL over ISDN) are dedicated to pilot
tones which are employed for synchronisation
purposes with ATU-C end. The software sets the
use of tones for optimisation of performances.
Time recovery is carried out by the chip-set
through the pilot tones. This activity is undertaken
in two steps in order to achieve no more than
2ppm with ATU-C.
The transceiver controller software monitors line
and channel. As far as line is concerned noise
margin, attenuation, power, carrier load, relative
capacity occupation are checked.
Channel’s monitoring deals with cell-delineation,
actual
ATM
(fast
and
interleaved)
up
and
downstream rates.
Figure 1 : ADSL modem block configuration
DMT MODEM ST70135A
UTOPIA
µ CONTROL
MEMORY
AFE
ST70134
χ
χ
UTP


Número de pieza similar - ST70134-ST70135A

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
STMicroelectronics
ST70134 STMICROELECTRONICS-ST70134 Datasheet
130Kb / 8P
   ASCOT ADSL MODEM CHIP SET FOR CPE
ST70134 STMICROELECTRONICS-ST70134 Datasheet
157Kb / 22P
   ASCOTTM INTEGRATED ADSL CMOS ANALOG FRONT-END CIRCUIT
January 2001
ST70134A STMICROELECTRONICS-ST70134A Datasheet
157Kb / 22P
   ASCOTTM INTEGRATED ADSL CMOS ANALOG FRONT-END CIRCUIT
January 2001
ST70134 STMICROELECTRONICS-ST70134_V01 Datasheet
157Kb / 22P
   ASCOTTM INTEGRATED ADSL CMOS ANALOG FRONT-END CIRCUIT
January 2001
More results

Descripción similar - ST70134-ST70135A

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
STMicroelectronics
ST70134 STMICROELECTRONICS-ST70134 Datasheet
130Kb / 8P
   ASCOT ADSL MODEM CHIP SET FOR CPE
logo
Synaptics Incorporated.
AR-11627 CONEXANT-AR-11627 Datasheet
159Kb / 24P
   AccessRunner ADSL Modem Device Set for PCI Applications
logo
STMicroelectronics
ST20190 STMICROELECTRONICS-ST20190 Datasheet
76Kb / 7P
   ADSL, ADSL2 and ADSL Modem Chipset for CPE Applications with Utopia II Interface
logo
Synaptics Incorporated.
CX11627 CONEXANT-CX11627 Datasheet
366Kb / 56P
   AccessRunner ADSL-USB Modem Device Set
logo
Bothhand USA, LP.
AS2001 BOTHHAND-AS2001 Datasheet
915Kb / 1P
   ADSL POTS Splitter For CPE
logo
Micro Electronics
SAT-1311 MICRO-ELECTRONICS-SAT-1311 Datasheet
294Kb / 2P
   TRANSFORMER FOR ADSL MODEM
SAT-1313 MICRO-ELECTRONICS-SAT-1313 Datasheet
183Kb / 1P
   TRANSFORMER FOR ADSL MODEM
SAT-1312 MICRO-ELECTRONICS-SAT-1312 Datasheet
226Kb / 1P
   TRANSFORMER FOR ADSL MODEM
SAT-1316 MICRO-ELECTRONICS-SAT-1316 Datasheet
193Kb / 1P
   TRANSFORMER FOR ADSL MODEM
PAT-0701 MICRO-ELECTRONICS-PAT-0701 Datasheet
174Kb / 1P
   TRANSFORMER FOR ADSL MODEM
More results


Html Pages

1 2 3 4 5 6 7 8


Datasheet Descarga

Go To PDF Page


Enlace URL




Política de Privacidad
ALLDATASHEET.ES
¿ALLDATASHEET es útil para Ud.?  [ DONATE ] 

Todo acerca de Alldatasheet   |   Publicidad   |   Contáctenos   |   Política de Privacidad   |   Intercambio de Enlaces   |   Lista de Fabricantes
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com