News & Events
Intersil’s Newest Endura™ PWM Controller Provides a Cost-Saving Solution for VoIP and VoDSL Markets

— ISL6401 controller generates talk and ring voltages for standard telephones

IRVINE, CA, September 6, 2001 – Intersil Corporation (NASDAQ: ISIL), a leading provider of power management solutions for PCs, file servers and portable information appliances, announced today the ISL6401, the latest Endura™ Pulse Width Modulator (PWM) current mode controller specifically designed to generate talk and ring voltages for telephone service over cable and Digital Subscriber Line (DSL) systems.

DSL gateways and other Voice-over-Internet Protocol (VoIP) appliances that provide Internet access and telephone service to a home or business must have an interface that provides a conventional telephone connection. Because the incoming digital service is not designed to provide power to conventional analog telephone equipment, the telephone interface circuit must do this by creating the proper voltages for on- and off-hook conditions and the ring signal. One ISL6401 controller can generate enough power for up to twelve Ringing Subscriber Line Interface Circuits (RSLICs) such as Intersil’s ISL5586.

"VoIP and VoDSL designers now have a talk and ring voltage supply solution that saves costs and board space by utilizing Intersil’s new highly-efficient Endura ISL6401 controller," said Rick Furtney, vice president and general manager of Intersil’s Analog Business Unit. "Voice-over-digital markets benefit greatly from our experience as a worldwide leader in power management and voice interface technologies. The ISL6401 is an example of that leadership as we have leveraged our technology and design expertise to provide another cost-saving solution."

Technical Information
The ISL6401 is an adjustable frequency, low power PWM current-mode controller used to generate voltages with more than 85 percent efficiency. DC-DC conversion efficiency is optimized using a low voltage to monitor current. In voice-over-digital applications, the ISL6401 is used to generate the required -24V (or -48V) for talk, and up to -120V for ring. A built in inverting amplifier allows direct feedback for regulation of the negative voltages used in ringing SLIC applications and saves parts count and cost.

A logic level input reduces supply current to 55uA in the shutdown mode. The PWM also features an adjustable operating frequency ranging from 50kHz to 600kHz, internal soft start, and a SYNC input allowing the ISL6401 oscillator to be locked to an external clock. The ISL6401 can also be used as a standard boost controller for positive voltages or as a regulator for either positive or negative voltages. Additionally, it satisfies a wide range of design problems including boost, flyback, forward and isolated output power supply configurations.

Pricing, Packaging and Availability
The ISL6401 is currently available in a 14-lead SOIC package. A 4 X 4 mm Micro Lead Frame Plastic (MLFP) package will be offered soon. The device is priced at $1.85 in 1,000 piece quantities. Boost controller and flyback evaluation boards for RSLIC power are also available. For more information, visit Intersil’s Web site at www.intersil.com/design/powermanagement or call 1-888-INTERSIL extension 8016.

About Intersil Power Management Technology
The Intersil Endura product family consists of leading power management solutions for desktop and mobile PCs, workstations, Internet appliances, RAID systems and high-availability servers. The Endura family includes high-efficiency solutions that are used in portable PCs and mobile information appliances as well as home gateway products. Intersil’s Endura DC-DC converters power nearly one-third of the world’s PentiumÒ III and PentiumÒ 4-class microprocessors and half of all AMD Athlon microprocessors. The company is the first to introduce a complete cost effective power solution for next generation PCs that use a multiphase power configuration to achieve microprocessor speeds greater than 1GHz. Learn more about Intersil Endura products at: www.intersil.com/endura.

About Intersil
Intersil is a leading communications company and supplier of semiconductors, reference designs and software for wireless networking and analog markets. Intersil applies analog, mixed-signal and radio frequency (RF) expertise to products that enable wireless and voice access to broadband media; provide reliable power management in all PCs, file servers and portable information appliances; and perform analog and digital signal conversion for cellular and Internet infrastructure. For more information about Intersil, visit the company's Internet homepage at: www.intersil.com.

This press release contains information relating to certain projections and business trends concerning the communications analog market that are forward-looking statements as defined in Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. Such forward-looking statements are based upon management’s current expectations, estimates, beliefs, assumptions, and projections about our business and industry. Words such as "anticipates," "expects," "intends," "plans," "believes," "seeks," "estimates," "may," "will" and variations of these words or similar expressions are intended to identify forward-looking statements. In addition, any statements that refer to expectations, projections or other characterizations of future events or circumstances, including any underlying assumptions, are forward-looking statements. These forward-looking statements are not guarantees of future performance and are subject to certain risks, uncertainties and assumptions that are difficult to predict. Therefore, our actual results could differ materially and adversely from those expressed in any forward-looking statements as a result of various risk factors. Important risk factors that may cause such material differences for Intersil Corporation ("Intersil") in connection with the communications analog market include, but are not limited to: the rate at which our present and future customers and end-users adopt Intersil’s communications analog and power management technologies and products; the timing, rescheduling or cancellation of significant customer orders; the loss of a key customer; the qualification, availability and pricing of competing products and technologies and the resulting effects on sales and pricing of our products; silicon wafer pricing and the availability of foundry and assembly capacity and raw materials; the effectiveness of Intersil’s expense and product cost control and reduction efforts; intellectual property disputes, customer indemnification claims, and other litigation risks; Intersil’s ability to develop, market, and transition to volume production new products and technologies in a timely manner; as well as other risk factors. Intersil’s Annual Report on Form 10-K, recent and forthcoming Quarterly Reports on Form 10-Q, and other Intersil filings with the U.S. Securities & Exchange Commission ("SEC") (which you may obtain for free at the SEC’s Web site www.sec.gov) discuss some of the important risk factors that may affect our business, results of operations, and financial condition. These forward-looking statements are made only as of the date of this press release and Intersil undertakes no obligation to update or revise these forward-looking statements.

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