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 applications. 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.

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 companion 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
■ Complete modem package
   – No dependency on external processor and easy,straight forward integration with external network processors
   – Full reference design kit for modem manufacturers, 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)

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