ON Semiconductor to Announce Second-Quarter 2008 Results

Business Wire, July 16, 2008

Company Provides Conference-Call Details

PHOENIX -- ON Semiconductor Corporation (Nasdaq: ONNN) plans to announce its financial results for the second quarter ending June 27, 2008, prior to the market opening on Wednesday, August 6, 2008.

The company will host a conference call at 8:00 a.m. Eastern Time (ET) on August 6, following the release of its financial results. Investors and interested parties can access the conference call in the following manner:

* Webcast: A live webcast of the conference call will be available via the Investors section of the company's website at http://www.onsemi.com. The re-broadcast of the call will be available at this site approximately one hour following the live broadcast and will continue for 30 days.

* Teleconference: A telephone conference of the earnings report can be accessed by dialing 888-546-9664 (U.S./Canada) or 706-679-4331 (International). In order to join this conference call, you will be required to provide the Conference ID Number - which is 56464044.

* Teleconference Replay: Approximately one hour following the live broadcast, the company will provide a dial-in replay that will continue to be available through August 13, 2008. To listen to the teleconference replay, call 800-642-1687 (U.S./Canada) or 706-645-9291 (International). You will be required to provide the Conference ID Number - which is 56464044.

About ON Semiconductor

With its global logistics network and strong product portfolio, ON Semiconductor (Nasdaq: ONNN) is a preferred supplier of high performance energy efficient silicon solutions to customers in the power supply, automotive, communication, computer, consumer, medical, industrial, mobile phone, and military/aerospace markets. The company's broad portfolio includes power, signal management, analog, DSP, advance logic, clock management and standard component devices. Global corporate headquarters are located in Phoenix, Arizona. The company operates a network of manufacturing facilities, sales offices and design centers in key markets throughout North America, Europe, and the Asia Pacific regions. For more information, visit http://www.onsemi.com.

ON Semiconductor and the ON Semiconductor logo are registered trademarks of Semiconductor Components Industries, LLC. All other brand and product names appearing in this document are registered trademarks or trademarks of their respective holders. Although the company references its Web site in this news release, such information on the Web site is not to be incorporated herein.