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ST20138 Unicorn II
PCI/USB ADSL CHIPSET: ST70138 + MTC20174 FOR ULTRA LOW COST ADSL MODEM
DATA BRIEF
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DESCRIPTION
The Unicorn II chipset is designed to simplify the development of low-cost ADSL CPE modems for Windows, Mac and Linux based environments and enables manufacturers to achieve a very competitive production cost. Due to its controller-less architecture and particularly the advantage that it does not require an external SDRAM in its E-BOM, the total cost of the external components needed in the modem is the best in its class. With a low component count of less then 140 external components and small form factor packages, the Unicorn II easily fits on a standard 2 layer single sided PCB with small dimensions which contributes significantly to further lowering overall system costs. Together with its low power consumption, highspeed performance up to 8 Mbps and customizable complete software driver packages, the Unicorn II is the ideal choice for USB and PCI based ADSL modems. Figure 1. Chipset Architecture Overview
The Unicorn II chipset consists of the digital ST70138 chip and the MTC20174 analog front end. The ST70138 is supplied in two packages, TQFP144 and LBGA80. The ST70138T packaged in TQ144 is a pin-to-pin compatible version of the ST70137 enabling manufacturers to benefit directly from the cost and performance advantages that the ST70138 brings. The TQ144 flavor brings out both the USB and PCI interfaces. Supplied in a compact USB-only LBGA80 package, the ST70138B brings additional cost advantages to new designs. The MTC20174 Analog Front End (AFE) with integrated line driver is designed for DMT based ADSL CPE modems compliant with ANSI T1.413 issue 2, ITU G.992.1 (G.dmt) and ITU G.992.2 (G.lite), for Annex A, B and C.
ST70138 DMT/ATM
MTC20174 AFE
Line Interface
USB
PCI
Phone Line
PC/Mac
EEPROM (0-16KB) Optional
September 2004
This is preliminary information on a new product foreseen to be developed. Details are subject to change without notice.
Rev. 1 1/6
ST20138 - Unicorn II
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STANDARDS COMPLIANCE AND INTEROPERABILITY
Eleven years of experience have enabled ST to develop a chipset that offers full compatibility with all current full-rate and G.lite ADSL standards, USB standards including plug-and-play support. The Unicorn II chipset has a comprehensive driver suite that supports Windows, Mac and Linux. The Unicorn is fully interoperable with all major DSLAMs and is compliant to TR-048 (DSLforum) and ETSI 101 388 performance requirements. 2.1 Protocols Supported
RFC 2684 bridged (LLC/SNAP and VCMUX) - replacing RFC 1483 RFC 2684 routed (LLC/SNAP and VCMUX) - replacing RFC 1483 RFC 2364 PPP over ATM (LLC and VCMUX) RFC 2516 PPP over Ethernet (LLC and VCMUX) RFC 2225 Classical IP over ATM

2.2 ATM and ATM adaptation support

VPI range: 0 - 255 VCI range: 32 - 65535. UNI 3.0, 3.1, 4.0 signaling TR37 (auto-configuration) UBR, CBR (with customizable parameters) AAL0, AAL5
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SOFTWARE SUITE
Unicorn shipping package includes a complete set of field proven software drivers and tools for Windows, Mac and Linux, including PC software for modem control and communications protocols. The software drivers are fully configurable and include diagnostic tools which are specifically developed to minimize operator helpdesk interference. 3.1 Software interface

NDIS WAN or NDIS5-ATM PCI driver and USB driver MAC / Linux OS: Open Transport driver
3.2 OS support

Win98, Win98SE, WinME, Win2K, WinXP MAC OS 8.6 till 10.3.x Up to Linux kernel 2.6.x
3.3 Hardware interfaces

USB connector or PCI interface RJ11 connector
3.4 Maximum supported speed

8Mbps downstream 1Mbps upstream
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ST70138
UNICORN IITM USB CONTROLLERLESS ADSL DMT TRANCEIVER
DATA BRIEF
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HARDWARE FEATURES
SUPPORT DIGITAL SIGNAL PROCESSING REQUIREMENTS FOR ONE ADSL CPE CHANNEL (ITU-R) COMPLIANT WITH ITU 992.1 (ADSL FULL RATE) ANNEX A (ADSL OVER POTS), ANNEX B (ADSL OVER ISDN), ITU 922.2 (G.LITE) AND ANSI T1.413. ENHANCED FTP TRANSFER CAPABILTIES DIRECT INTERFACE TO USB (USB RELEASE 1.1 SPECIFICATION) DIRECT INTERFACE TO EXTERNAL 8/16bit SERIAL MEMORY TO SUPPORT USB USER'S CONFIGURATION. DIRECT ANALOG FRONT END INTERFACE FOR MTC20174 CLOCK & RESET INTERFACE 1.8V AND 3.3V POWER SUPPLY TTL LOGIC LEVELS COMPATIBLE POWER MANAGEMENT CAPABILITIES LOW POWER CONSUMPTION : MAX 0.45W TQFP144 (ORDER CODE ST70138T BACKWARD COMPATIBLE WITH PREVIOUS ST70137) LFBGA80 (ORDER CODE ST70138B)
Figure 2. Packages
TQFP144
LFBGA80
Table 1. Order Codes
Part Number ST70138T ST70138B Package TQFP144 LFBGA80

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DESCRIPTION
Unicorn II is an evolution of the field-proven and mass deployed Unicorn modem that dramatically lowers the overall system cost when designing and producing a USB ADSL modem. The Unicorn II chipset is designed using cost effective CMOS technology, further integrating external components which leads to even lower E-BOM costs, reduced component count and lower PCB complexity; All of this while increasing overall performance. Its proven controller-less and SDRAMless architecture is highly competitive and well suited in today's cost focused modem market. The Unicorn II chipset is designed to simplify the development of low-cost ADSL CPE modems for Windows, Mac and Linux based environments and enables manufacturers to achieve a very competitive production cost. Due to its controller-less architecture and particularly the advantage that it does not require an external SDRAM in its E-BOM, the total cost of the external components needed
September 2004
in the modem is the best in its class. With a low component count of less then 140 external components and small form factor packages, the Unicorn II easily fits on a standard 2 layer single sided PCB with small dimensions which is contributes significantly to further lowering overall system costs. Together with its low power consumption, highspeed performance up to 8 Mbps and customizable complete software driver packages, the Unicorn II is the ideal choice for USB based ADSL modems. The ST70138T/B is the ADSL DMT transceiver chip of the UNICORN2TM Chipset. ST70138T in intended to be used as a pin-to-pin replacement part of the ST70137 device in order to get advantage from its better cost-structure and its enhanced FTP transfer capabilities. ST70138T is packaged in a TQ144 package. Full backward compatibility with already existing USB PCB designs is assured. ST70138B, packaged in LFBGA80 is intended for new PCB designs, which will benefit from extensive E-BOM reduction in the reference design, mass production friendly EEPROM programmation, enhanced FTP throughput and overall lower system cost structures. Eleven years of experience have enabled ST to develop a chipset that offers full compatibility with all current full-rate and G.lite ADSL standards, USB standards including plug-and-play support. The Unicorn II chipset has a comprehensive driver suite that supports Windows operating systems from 98 to XP, Mac operating systems 8 to X and Linux. The Unicorn is fully interoperable with all major DSLAMs and is compliant to TR-048 (DSLforum) and ETSI 101 388 performance requirements.
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This is preliminary information on a new product foreseen to be developed. Details are subject to change without notice.
MTC20174
ADSL ANALOG FRONT END WITH INTEGRATED LINE DRIVER FOR CPE APPLICATIONS
DATA BRIEF
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FEATURES
Fully Integrated AFE and Line Driver for ADSL Overall 12 bit resolution, 1.1MHz signal bandwidth 8.8 MS/s ADC 8.8 MS/s DAC Differential analog I/O Accurate continuous-time channel filtering 5th & 4th order tunable continuous-time receive and transmit filters respectively Support for multiple ADSL standards: - ANSI T1.413 Issue 2 - ITU G.992.1 (G.dmt) - Annex A - Annex B (ADSL over ISDN) - Annex C (ADSL over ISDN SBM/DBM/ G.dmt) - ITU G.992.2 (G.lite)
Figure 3. Package
TQFP100

Table 2. Order Codes
Part Number MTC20174-TQ-C1 MTC20174-TQ-C1TR Package TQFP100 Tape & Reel Temperature 0 to 70C 0 to 70C
It is intended to be used with the MTC20166 DMT modem and ATM framer as part of the MTK20170 chipset, but may also be used to support other ADSL signal processors. It includes the following parts: A 12-bit 8.8Msamples/s DAC

A 13-bit 8.8Msamples/s ADC Tunable low-pass and high-pass filters Low-noise PGAs A TX Pre-Amplifier A TX Line-Driver A fully integrated DCXO A PLL-based frequency doubler A filter tuning circuit A dying gasp circuit A digital module for control, test and interface
Highest performance: - Operation up to 18 kft (26 AWG) - More than 8 Mbps downstream and 832 Kbps upstream up to 8 kft (26 AWG) - More than 3 Mbps downstream and 760 kbps upstream up to 12 kft (26 AWG) 100 pin TQFP package allows high-density board design

Power dissipation of 900mW at 25C, typical
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APPLICATIONS
The MTC20174 is an ADSL Analog Front-End (AFE) with integrated Line-Driver for ATU-R applications offering Annex A, B and C.
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GENERAL DESCRIPTION
The MTC20174 Analog Front End (AFE) with integrated line driver is designed for DMT based ADSL CPE modems compliant with ANSI T1.413 issue 2, ITU G.992.1 (G.dmt) and ITU G.992.2 (G.lite), for Annex A, B and C.
The following figure provides a graphical representation of the MTC20174 functional blocks with an additional separation in RX and TX path. The analog and digital part have separated 3.3V power supplies. In addition some part of the analog section of the MTC20174 has a power supply of 5V. The typical total power consumption of the MTC20174 is 900mW for 12dBm of line power (full operation) at 250C. The package is a 100 pin TQFP.
September 2004
This is preliminary information on a new product foreseen to be developed. Details are subject to change without notice.
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ST20138 - Unicorn II
Table 3. Revision History
Date September 2004 Revision 1 First Issue Description of Changes
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ST20138 - Unicorn II
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners (c) 2004 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com
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