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ST70138

September 2004

This is preliminary information on a new product foreseen to be developed. Details are subject to change without notice.

4

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)

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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 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 BRIEF

UNICORN II™ USB

CONTROLLERLESS ADSL DMT TRANCEIVER

Figure 2. Packages

Table 1. Order Codes

Part Number

Package

ST70138T

TQFP144

ST70138B

LFBGA80

TQFP144

LFBGA80