Brian Halla, chairman

Don Macleod, president and chief executive officer

Lewis Chew, chief financial officer

Mark Veeh, investor relations manager

When:

Thursday, Dec. 10

1 p.m. - earnings press release issued

1:30 p.m. - conference call begins

How:

Participants may dial (888) 434-6355 or (706) 902-0309

Live audio Webcast at http://www.national.com/analog/invest

A dial-in replay of the earnings conference call will be available approximately one hour after the call has been completed. This replay will be available until Dec. 17, 2009. To hear the replay, you may call (800) 642-1687 or (706) 645-9291 and provide pin #30630310

An archive of the Webcast will be available at http://www.national.com/analog/invest/conf and also through Street Events at www.thomsonone.com approximately one hour after the call has been completed. This Webcast will be available until March 11, 2010.

About National Semiconductor

National Semiconductor is a leader in analog power management technology. Its products include easy-to-use integrated circuits, PowerWise products that enable more energy-efficient systems, and SolarMagic products which improve the energy output of solar arrays. The company celebrates its 50th anniversary this year. Headquartered in Santa Clara, Calif., National reported sales of $1.46 billion for fiscal 2009. Additional information is available at www.national.com.

    Media Contact:                      Financial:
    LuAnn Jenkins                       Mark Veeh
    National Semiconductor              National Semiconductor
    (408) 721-2440                      (408) 721-5007
    luann.jenkins@nsc.com               invest.group@nsc.com

SOURCE National Semiconductor Corp.

http://www.national.com

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National's WEBENCH Visualizer tool supports a variety of power supply topologies such as buck, boost, buck-boost, SEPIC and flyback. Several alternative circuit configurations are also available to address specific needs like fixed-frequency and constant-on-time architectures as well as current-mode and voltage-mode control loops. With the broadest power parts library from 110 manufacturers, designers can specify a wide range of parameters:

    --  Vin from 1V - 100V
    --  Vout from 0.6V - 300V
    --  Power up to 300W
    --  Efficiency up to 96 percent
    --  Frequency up to 3 MHz

    --  Footprint from 14 mm by 14 mm

How WEBENCH Visualizer Works

The WEBENCH Visualizer tool features an optimizer dial that enables engineers to "dial-in" their preference for footprint, system BOM cost and power efficiency. The tool instantly creates 50-70 designs from 48 billion possible design options. It then highlights the smallest and most efficient designs, with one recommended as a starting point for further optimization.

A second visualizer control panel allows engineers to adjust their design options for voltage, current and temperature. In seconds, an updated set of solutions appears, highlighting each design's topology, schematic, footprint, efficiency, operating values and BOM cost/count. The tool's interactive filter allows engineers to further fine-tune the power supply design to meet the target system's exact requirements.

Once a design is selected, National's WEBENCH design environment offers the ability to further tune and optimize that design through additional component options and electrical and thermal simulation. With the "Build It!" feature, National ships a custom power supply prototype kit within 24 hours. To view a video demonstration or begin an analysis with the WEBENCH Visualizer tool, go to www.national.com/visualizer.

The WEBENCH Visualizer tool is an extension of National's award-winning WEBENCH tools for LEDs and power design. These tools offer instant access to the latest simulation models, parametric data and package information, enabling designers to simultaneously compare the performance of multiple devices in multiple circuit requirements.

About National Semiconductor

National Semiconductor is a leader in analog power management technology. Its products include easy-to-use integrated circuits, PowerWise products that enable more energy-efficient systems, and SolarMagic products which improve the energy output of solar arrays. The company celebrates its 50th anniversary this year. Headquartered in Santa Clara, Calif., National reported sales of $1.46 billion for fiscal 2009. Additional information is available at www.national.com.

WEBENCH and PowerWise are registered trademarks, and SolarMagic is a trademark of National Semiconductor Corporation.

    Media Contact                                  Reader Information
    Mark Alden                                     Design Support Group
    National Semiconductor                         National Semiconductor
    (408) 721-6929                                 (800) 272-9959
    mark.alden@nsc.com                             www.national.com

SOURCE National Semiconductor Corp.

http://www.national.com