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Intersil’s PRISM® WLAN Solution Selected by AT&T Labs For Home Wireless Networking Demonstrations

— Demos part of AT&T Labs’ Innovation Forum

PALM BAY, FL – April 3, 2000 – Intersil Holding Corporation (NASDAQ: ISIL), the world’s leading developer of silicon technology for Wireless Local Area Networks (WLANs), announced that its PRISM WLAN solution was used in a demonstration of home wireless networking given as part of AT&T Labs’ annual Innovation Forum. AT&T Labs, the research and development arm of AT&T (NYSE: T), demonstrated a home broadband wireless multimedia distribution concept, showing that wireless LAN technology is practical for distributing high-quality voice, compressed video, and Internet communications throughout the home. When combined with DOCSIS-based broadband service delivery via cable, such a system allows users to easily install, expand, and rearrange broadband service delivery points in the home.

The demonstrated system used Intersil’s PRISM technology, compatible to a Quality of Service (QOS) framework AT&T is actively researching and has introduced into the standards process. AT&T submitted its protocol to the IEEE 802.11 Wireless LAN/MAN Standard Committee, which recently opened a Task Group to improve and manage QOS enhancements needed to support multimedia services, provide classes of service, and enhance security and authentication mechanisms. Intersil and other 802.11 members are cooperatively supporting AT&T’s protocol and are also engaged in harmonization activities with other QOS protocol candidates.

"This demo is typical of what will really happen in many homes over coming years," said Larry Ciaccia, vice president and general manager of Intersil’s PRISM Wireless Products business. "Seeing fast, multimedia-capable systems such as this bring to mind all kinds of family activities made possible through wireless networking: Mom and Dad enjoying a digital movie beamed from a central DVD player; kids talking on VoIP phones or pulling multimedia-rich web content into a laptop or WebPads. Certainly, having AT&T Labs actively working toward the development of 802.11-based wireless home networking protocols is another big boost for this increasingly important global standard."

PRISM II is the most highly integrated WLAN chip set on the market today, delivering wired Ethernet-equivalent data rates and compliance to the IEEE’s 802.11b global standard. Optimized for high data rate (11 Mbps) wireless networking, PRISM II-based systems are feature-rich and provide better, more reliable performance in all types of networking environments. Advanced design and silicon germanium (SiGe) process technologies reduce power consumption, design complexity and total system cost.

Adoption of PRISM WLAN Technology
Since introducing the PRISM WLAN chip set in 1996, over fifty companies have incorporated PRISM chips in more than 100 product designs. PRISM technology is designed to comply with the IEEE’s 802.11 global standard. Intersil is also a founding sponsor of the Wireless Ethernet Compatibility Alliance (WECA), whose Wi-Fi™ brand will be a mark of compatibility for 802.11-based systems. Intersil has a continuing program to rapidly introduce better performing, more highly integrated generations of PRISM chip sets and supporting design tools. PRISM chips are used in WLAN systems from industry-leading companies including Nokia, Siemens, Cisco, Compaq, 3Com, Dell, Nortel, Samsung, SpectraLink, Symbol, and Zoom.

About AT&T Labs
AT&T Labs, the research and development unit of AT&T, is working to create the information services and communications network of tomorrow. AT&T Labs is a leader in the development of technologies and standards for audio, speech, video and image compression; electronic commerce and digital copyright management; search and directory services; speech processing and coding of all sorts; network architecture, design, engineering and operations; and other areas critical to the advancement of new communications, Internet and broadband offerings.

About Intersil
Intersil uses its semiconductor expertise to enable highly integrated voice, data and video communications. Intersil's integrated communications portfolio includes PRISM® Wireless Local Area Network (WLAN) chip sets that enable mobile connectivity products for the home and office; analog and mixed-signal integrated circuits for broadband access to wireless and wired Wide Area Networks (WANs); and power management products that enable 24x7 reliability in network servers, next generation PCs and information appliances. For more information about Intersil, visit the company's Internet homepage at www.intersil.com.

This press release contains information relating to forecasted results of Intersil, including certain projections and business trends, that are forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995. Actual results may differ materially from these forward-looking statements as a result of certain risks and uncertainties. These risks and uncertainties include, but are not limited to global and market conditions as well as other risks and uncertainties detailed from time to time in Intersil's filings with the Securities Exchange Commission. These forward-looking statements are made only as of the date of this press release and Intersil undertakes no obligation to update or revise the forward-looking statements, whether as a result of new information, future events, or otherwise.

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PRISM is a registered trademark of Intersil Corporation.