ST20138

Unicorn II ST70138T 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 neededin 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 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 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.