ST20138

Datasheet | Orderable Products | Features and Description | Technical Documents

Reference	Filesize	Pages	Last Updated
ST20138	150 kb	9	16/04/2007

Device	Status	RoHS	Package	Purchase
ST70138T	Active	Leaded	TQFP144
E-ST70138B	Active	Lead-free	LFBGA80
MTC20174-TQ-C1TR	NRND	Leaded	TQFP100
E-MTC20174	Active	Lead-free	TQFP100

ST70138 - Digital chip features:
	Integrated ADSL DMT engine
	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 capabilities
	Direct interface to USB (USB release 1.1 specification)
	Direct interface to external 8/16 bit 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 (backward compatible with ST70137 legacy ADSL USB chip) and LFBGA80 packages
MTC20174 - Analog front-end 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 and highest performance
	100 pin TQFP package allows high-density board design
	Power dissipation of 900mW at 25°C, typical
	TQFP100 package

Performance, cost and time to market are key factors in DSL modem development.

The Unicorn II chipset has been designed with all these care-abouts in mind, providing CPE manufacturers with a complete and extremely cost-effective solution for ADSL USB modems operating under a variety of operating systems, such as Microsoft Windows™, Mac OS and Linux.
The controller-less architecture of the Unicorn II and the fact that it does not require an external SDRAM, make its external bill-of-materials (EBOM) best-in-class.

Thanks to its small form factor packages and an external component count of less than 140, the Unicorn II easily fits on a small-dimension standard 2-layer single-sided PCB which further reduces overall system cost. Combining low power consumption, high-speed performance (up to 8 Mbps), field-proven driver software and customizable user interface, the Unicorn II is the ideal choice for cost-conscious equipment manufacturers, telecom operators/ISPs and ADSL users alike.

The Unicorn II chipset consists of the ST70138 digital chip and the MTC20174 analog front end with integrated line driver.

The ST70138 is supplied in two packages, LBGA80 and TQFP144. The ST70138T, packaged in TQ144, is pin-compatible to the ST70137 legacy ADSL USB chipset, enabling manufacturers to benefit directly from the cost and performance advantages that the ST70138 brings.

Supplied in a compact LBGA80 package, the ST70138B brings additional cost advantages to new designs.

The MTC20174 has been designed for use in DMT-based ADSL CPE modems than comply with ANSI T1.413 issue 2, ITU G.992.1 (G.dmt) andITU G.992.2 (G.lite), for Annex A and B, and the DT U-R2 specification.

Block diagram

Reference	Filesize	Pages	Last Updated
ST20138	150 kb	9	16/04/2007