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To: David Lawrence who wrote (5302)	12/14/1998 4:05:00 PM
From: Ernie Kelley	Read Replies (1) \| Respond to of 9236

Bell Atlantic Awarded Patent for Rate-Adaptive DSL Technology biz.yahoo.com

To: David Lawrence who wrote (5302)	12/21/1998 11:43:00 AM
From: Scrapps	Respond to of 9236

Pulse Introduces New ADSL Line Interface Transformers Small-Footprint, Low-Profile Devices Interface to Analog Devices' AD20msp910 and AD20msp918 ADSL Chipsets SAN DIEGO--(BUSINESS WIRE)--Dec. 21, 1998--Pulse, a leading designer and manufacturer of high-quality components and modules for local area networks (LANs), digital and analog telecommunications and power supplies today announced the immediate availability of two new line transformers that interface with Analog Devices' AD20msp910 asymmetric digital subscriber line (ADSL) chipset in addition to its second-generation AD20msp918 ADSL chipset. The B2031 (through hole) and B2032 (surface mount) line interface transformers have been approved by Analog Devices and are designed to meet the supplementary insulation requirements of the International Electrotechnical Commission (IEC) 950 documents. ''We are pleased to work in conjunction with Pulse on this project,'' said Rupert Baines, product line manager for ADSL products at Analog Devices. ''Pulse worked very closely with us to insure that its B2031 and B2032 meet the stringent electrical performance requirements of Analog Devices' analog front end (AFE) solution. Combined, the products offer a highly reliable solution.'' ''Both of our transformers provide excellent total harmonic distortion (linearity) and longitudinal balance throughout the entire ADSL data frequency range of 30KHz through 1.1 MHz,'' stated David Wilding, Senior Product Manager for xDSL products at Pulse. ''In addition, the small footprint and low profile provide an ideal solution for high component density PC boards where real estate is at a premium.'' In addition to being approved by Analog Devices, both parts have received safety agency approvals to UL 1950 and EN 60950 from UL and TUV, respectively. These supplementary insulation approvals are rated for a working voltage of up to 250 Vrms. Pricing and Availability: The through hole B2031 is available in trays and the surface mount B2032 comes in either trays or tape and reel packaging that allows pick and place capability. Please specify B2032T for the tape and reel version. Full electrical and mechanical specifications are listed on data sheet B906 which is available at pulseeng.com. Both parts are priced at $2.10 in quantities of 10,000. Samples are available immediately. Production quantities require an 8-10 week lead time. Technical Specifications: Electrical Specifications at 25 degrees C Operating Temperature 0 degrees C to 70 degrees C Part Number B2031 B2032 Mounting THT SMT Turns Ratio (+/- 2%) 1:1 1:1 OCL at 10 KHz 0.1 V (mH +/- 10%) (1-4) with 2-3 shorted 5.0 5.0 OCL at 10 KHz 0.1 V (mH +/- 10%) (10-7) with 8-9 shorted 5.0 5.0 Leakage Inductance at 100 KHz, 0.1 V (MAX) (1-4) with 2-3, 10-7 shorted 18.0 uH 18.0 uH Longitudinal Balance (25 MHz-1MHz) 40 dB MIN 40 dB MIN THD (Linearity) -80 dB at 30 KHz -60 dB at 300 KHz Load Resistance (omega) 100 100 DC Resistance (1-4), (10-7) 3(omega)MAX 3(omega)MAX Isolation Voltage (VRMS) 1500 1500 Insertion Loss (see note A) (dB at 100 KHz) <0.5 <0.5 Note A: Frequency Response +/- 1.0 dB MAX, from 30 KHz to 1.1 MHz Headquartered in San Diego, Pulse has been an international leader in magnetic components for over 40 years. The company is one of the largest manufacturers of magnetic components in the world with a global reputation for technical excellence coupled with outstanding quality. Pulse is a subsidiary of Technitrol (NYSE:TNL - news), a worldwide producer of technology components with revenues of more than $427 million for the last four quarters. Pulse designs and manufactures a complete line of passive components and modules for use in power, telecommunications and datacom applications matched to OEM products. The ISO registered company has manufacturing facilities in the Far East, United States and Europe. Pulse's products are available through direct sales as well as authorized distributors and representatives. In North America, contact Pulse's worldwide headquarters in the United States at 619/674-8100. The European headquarters can be reached in the United Kingdom at 44 1483 401700. The Asian headquarters can be reached in Singapore at 65-2878998. For more information, visit the Pulse web site at pulseeng.com. Color slides available on request, please call Allison Bourassa, 949/442-8326. (c) 1998 Pulse Engineering Inc. All brand names and trademarks are properties of their respective holders. biz.yahoo.com