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PDF ST20190 Data sheet ( Hoja de datos )
| Número de pieza | ST20190 | |
| Descripción | ADSL ADSL2 and ADSL Modem Chipset | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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ST20190www.DataSheet4U.com
ADSL, ADSL2 and ADSL+
Modem Chipset for CPE Applications with Utopia II Interface
DATA BRIEF
1 APPLICATIONS
■ Low end and high end ADSL Bridge and Router
solutions
■ ADSL Modems / routers for residential and
SOHO broadband access to www and
corporate VPNs
■ Integrated Access Devices offering VoDSL or
VoIP applications
■ Home gateway solutions
2 FEATURES
■ High Integration
– 2 chips, Line to ATM
– Direct ATM Interface
– Line Driver integrated
– Highly reduced bill of material cost
■ Support for multiple ADSL standards:
– ANSI T1.413 Issue2
– ITU G.992.1 (G.dmt)
– Annex A, Annex B, Annex C
– ITU G.992.2 (G.Lite)
– ITU G.992.3 (ADSL2)
– Annex A, B, C, I, J and L
– ITU G.992.4 (G.Lite bis)
– ITU G.992.5 (ADSL2+)
– Annex A, B, C, I, J and L
– Support of ReachDSLTM with digital com-
panion chip
■ Cat II functionality: Trellis coding and echo
cancellation
■ Dual latency support: fast + interleaved
■ Small footprint packages allow high density
board designs
■ Embedded controller with cache for powerful
and flexible on chip control of the modem
operation
Figure 1. Package
TQFP100
Table 1. Order Codes
Part Number
ST20184
ST20196
LBGA208
Package
TQFP100
LBGA208
■ Complete modem package
– No dependency on external processor and
easy,straight forward integration with external
network processors
– Full reference design kit for modem manufac-
turers, including schematics, layout, BoM,
HW design guide, firmware
■ Highest Performance
– Fully rate-adaptive
– ADSL mode > 12 Mbps in Downstream and >
1 Mbps in Upstream
– ADSL+ mode > 20 Mbps in Downstream and
> 2 Mbps in Upstream when using 64 tones
(annex L)
3 OVERALL DESCRIPTION
The ST20190 is a new generation ADSL chipset
from STMicroelectronics. It is highly integrated
and has the flexibility to offer all standards, all an-
nexes while being fully optimised for CPE applica-
tions. It provides all the required functions to
implement a complete Utopia rate adaptive DMT
ADSL modem. It consists of the optimised ADSL
Analogue Front-End chip ST20184 and the digital
chip ST20196 which includes a DMT/ATM mo-
dem, and a dedicated ADSL Transceiver Control-
ler with associated Firmware.
As shown in Fig.2, the chipset interfaces have
been defined to allow direct integration into sys-
tems design, reducing both time-to-market and im-
June 2004
REV. 1
1/7
This is preliminary information on a new product now in development. Details are subject to change without notice.
1 page  
ST20190
6 SUMMARY OF CHARACTERISTICS ST20190
www.DataSheet4U.com
6.1 ST20184 FEATURES
■ Fully integrated ADSL line driver concept (minimises external components)
■ Standards support for:
– ANSI T1.413 Issue 2
– ITU G.992.1 (G.dmt)
– Annex A, B and C
– ITU G.992.2 (G.lite)
– ITU G.992.3 (ADSL2)
– Annex A, B, C, I, J and L
– ITU G.992.5 (ADSL2+)
– Annex A, B, C, I, J and L
– Support of ReachDSL with digital companion chip
■ 14 bit Σ∆ ADC with equivalent ENOB @ 2.2 MS/s
■ 8.8MS/s DAC (14bits)
■ Integrated ADSL highpass filter for POTS and Echo cancellation
■ Fixed XTAL
■ 2.2MHz signal bandwidth / 4.3 kHz tone spacing
■ Supply voltages: 3.3V and 5V
■ Temperature range: -40°C to 85°C
■ Typical power consumption 900 mW
■ Package: TQFP100
6.2 ST20196 FEATURES
■ DMT modulation
■ Max. number of bit per tone: 15 bits (32766 constellation points)
■ Max. number of tones: 512 tones
■ Flexible bit assignment
■ Max clock speed: 36 MHz
■ Max. tone spacing: 4.325 kHz
■ RS encoder: max code word 256 bytes
■ ATM Processor:
– ATM cell buffering
– Cell counting
– Insert/Extract, Idle/Unassigned ATM cells (rate adaptation)
– ATM HEC generation module (CCITT I.432)
– ATM payload scrambler: payload width: 48 bytes
■ Full support of Utopia level 1 or 2 interface
■ Cached ARM controller for improved performance
■ Modem Command interface
– compatible with Utopia level 2 8-bit parallel management interface
– ST's CtrlE modem control command protocol
– Access through parallel 8bit bus or asynchronous serial port
– Dual port RAM mailbox
■ Interface to ReachDSL™ engine
■ Supply voltages: 3.3V and 1.2V
■ Temperature range: -40°C to 85°C
■ Typical power consumption 700 mW
■ Package: LBGA208
5/7
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