MTC20174-TQ-C1TR ,PCI/USB ADSL CHIPSET: ST70138 + MTC20174 FOR ULTRA LOW COST ADSL MODEMST20138Unicorn IIPCI/USB ADSL CHIPSET: ST70138 + MTC20174FOR ULTRA LOW COST ADSL MODEMDATA BRIEFThe ..
MTC20454 ,Quad Integrated ADSL CMOS Analog Front End CircuitAPPLICATIONSgain control for four individual ADSL modems.■ ADSL Front-end for high density, low pow ..
MTC20454 ,Quad Integrated ADSL CMOS Analog Front End CircuitABSOLUTE MAXIMUM RATINGSOperation of the device beyond these limits may cause permanent damage. It ..
MTC20454-TQ-I , QUAD INTEGRATED ADSL CMOS ANALOG FRONT END CIRCUIT
MTC20455MB7K ,Quad ADSL DMT TransceiverMTC20455QUAD ADSL DMT TRANSCEIVER■ Quad DMT modem ATM framer■ Supports ANSI T1.413 issue 2, ITU G.9 ..
MTC4501Q8 , N- AND P-CHANNEL ENHANCEMENT MODE POWER MOSFET
N82S23N ,256-bit TTL bipolar PROM 32 x 8
N8344AH , SDLC Communications Controller
N83C196KB , COMMERCIAL/EXPRESS CHMOS MICROCONTROLLER
N83C198 , COMMERCIAL/EXPRESS CHMOS MICROCONTROLLER
N83C198 , COMMERCIAL/EXPRESS CHMOS MICROCONTROLLER
N83C198 , COMMERCIAL/EXPRESS CHMOS MICROCONTROLLER
MTC20174-TQ-C1TR-ST70138B
PCI/USB ADSL CHIPSET: ST70138 + MTC20174 FOR ULTRA LOW COST ADSL MODEM
1/6
ST20138
Unicorn IISeptember 2004
DESCRIPTIONThe 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 compet-
itive production cost. Due to its controller-less ar-
chitecture 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 compo-
nents and small form factor packages, the Unicorn
II easily fits on a standard 2 layer single sided PCB
with small dimensions which contributes signifi-
cantly to further lowering overall system costs. To-
gether with its low power consumption, high-
speed performance up to 8 Mbps and customiz-
able complete software driver packages, the Uni-
corn II is the ideal choice for USB and PCI based
ADSL modems.
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 direct-
ly 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 addition-
al cost advantages to new designs.
The MTC20174 Analog Front End (AFE) with inte-
grated 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.
DATA BRIEFPCI/USB ADSL CHIPSET: ST70138 + MTC20174
FOR ULTRA LOW COST ADSL MODEM
Figure 1. Chipset Architecture OverviewRev. 1
ST20138 - Unicorn II STANDARDS COMPLIANCE AND INTEROPERABILITYEleven years of experience have enabled ST to develop a chipset that offers full compatibility with all cur-
rent 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 in-
teroperable with all major DSLAMs and is compliant to TR-048 (DSLforum) and ETSI 101 388 perfor-
mance 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
SOFTWARE SUITEUnicorn 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 op-
erator 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
3/6
ST70138September 2004
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)
DESCRIPTIONUnicorn 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 compo-
nents which leads to even lower E-BOM costs, re-
duced component count and lower PCB
complexity; All of this while increasing overall per-
formance. Its proven controller-less and SDRAM-
less 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 compet-
itive production cost. Due to its controller-less ar-
chitecture 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 compo-
nents and small form factor packages, the Unicorn
II easily fits on a standard 2 layer single sided PCB
with small dimensions which is contributes signifi-
cantly to further lowering overall system costs. To-
gether with its low power consumption, high-
speed performance up to 8 Mbps and customiz-
able complete software driver packages, the Uni-
corn II is the ideal choice for USB based ADSL
modems.
The ST70138T/B is the ADSL DMT transceiver
chip of the UNICORN2™ 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 de-
signs is assured.
ST70138B, packaged in LFBGA80 is intended for
new PCB designs, which will benefit from exten-
sive E-BOM reduction in the reference design,
mass production friendly EEPROM programma-
tion, enhanced FTP throughput and overall lower
system cost structures.
Eleven years of experience have enabled ST to de-
velop a chipset that offers full compatibility with all
current full-rate and G.lite ADSL standards, USB
standards including plug-and-play support. The Uni-
corn 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.
DATA BRIEFUNICORN II™ USB
CONTROLLERLESS ADSL DMT TRANCEIVER
4/6
MTC20174September 2004
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 filtering5th & 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) 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 25°C, typical
APPLICATIONSThe MTC20174 is an ADSL Analog Front-End
(AFE) with integrated Line-Driver for ATU-R appli-
cations offering Annex A, B and C.
GENERAL DESCRIPTIONThe MTC20174 Analog Front End (AFE) with inte-
grated 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.
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
The following figure provides a graphical repre-
sentation 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 ana-
log 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 250°C.
The package is a 100 pin TQFP.
DATA BRIEFADSL ANALOG FRONT END WITH INTEGRATED LINE
DRIVER FOR CPE APPLICATIONS
5/6
ST20138 - Unicorn II
Table 3. Revision History
. 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
© 2004 STMicroelectronics - All rights reserved
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ST20138 - Unicorn II
