New 1.2 mm x 1.2 mm NTK313xx Devices Deliver Comparable

Performance to SC-89 MOSFETs Utilized in Today's Portable Electronics

but Offer a 44 Percent Smaller Footprint and a 38 Percent Lower

                                Profile

PHOENIX--(BUSINESS WIRE)--Feb. 8, 2007--ON Semiconductor (Nasdaq: ONNN), a global leader in power management semiconductor solutions, today introduced a new generation of power MOSFETs offered in tiny SOT-723 packages and optimized for space-constrained portable applications. These new low threshold power MOSFETs utilize ON Semiconductor's leading-edge Trench technology to achieve comparable electrical and power performance to MOSFETs offered in much larger SC-89 or SC-75 packages.

NTK3134N is a 20 volt (V), 890 milliampere (mA), N-Channel MOSFET. The NTK3139P is a -20 V, -780 mA, P-Channel MOSFET. Both devices have low RDS(on) values for over 200 mA operating current and 1.5 V low gate voltage to allow direct control from power management ASIC or other controllers.

The NTK313xx devices are ideal for load/power switching applications and small signal interface switching. Featuring integrated electrostatic discharge (ESD) protection, the devices minimize the need for special handling and assembly processes. The 1.2 mm x 1.2 mm footprint of the SOT-723 package utilizes 44 percent less board space than similar performing MOSFETs offered in the SC-89 or SC-75 packages. With a low vertical clearance of 0.5 mm, the new SOT-723 packaged MOSFETs satisfy the requirements of new generation ultra-thin handheld portable devices.

Both devices are currently in production and available. Budgetary pricing is $0.13 USD per unit in 10,000 unit quantities. For additional information, visit www.onsemi.com or contact Sam.Abdeh@onsemi.com.

About ON Semiconductor

With its global logistics network and strong portfolio of power semiconductor devices, ON Semiconductor (Nasdaq: ONNN) is a preferred supplier of power solutions to engineers, purchasing professionals, distributors and contract manufacturers in the computer, cell phone, portable devices, automotive and industrial markets. For more information, please visit ON Semiconductor's website at 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.

    CONTACT: ON Semiconductor, Phoenix
             Anne Spitza, 602-244-6398
             anne.spitza@onsemi.com
             Ken Rizvi, 602-244-3437 (Investor Relations)
             ken.rizvi@onsemi.com

    SOURCE: ON Semiconductor