Microsemi Corporate Presentation

Solving the most difficult

system challenges

2010 Microsemi

Exhibit (a)(5)(c)

Q3 FY10

Enterprise

& Commercial

23%

Aerospace

20%

17%

Security & Defense

40%

Industrial & Alt. Energy

Solving the most difficult system challenges…

…with the world’s most complete technology portfolio

2010 Microsemi

A Model of Managed Growth

Consistently Driving SAM Expansion

2011(E)

2006

2001

Small Signal Transistors

Medium Signal Transistors

Inverters

LDOs

2001 SAM: $500M

2006 SAM: $850M

GaAs Diodes

RF Power Amplifiers

Power Switching

Small Signal Transistors

2011 SAM: $2.3B

Anti-Tamper

Board Level Systems

DC/DC

–

ICs

–

Converters

–

Subsystems

GaAs Diodes

LED Backlighting

–

SoC

RadHard

–

MOSFETS

–

Hybrids

–

Transistors

Power over Ethernet

WLAN Power Amplifiers

A Model of Managed Growth

Consistently Driving SAM Expansion

2011(E)

2006

2001

Small Signal Transistors

Medium Signal Transistors

Inverters

LDOs

2001 SAM: $500M

2006 SAM: $850M

GaAs Diodes

RF Power Amplifiers

Power Switching

Small Signal Transistors

2011 SAM: $3.1B

Mixed Signal VLSI / FPGA

Anti-Tamper

Board Level Systems

DC/DC

–

ICs

–

Converters

–

Subsystems

GaAs Diodes

LED Backlighting

–

SoC

RadHard

–

MOSFETS

–

Hybrids

–

Transistors

Power over Ethernet

WLAN Power Amplifiers

Strategic Worldwide Footprint

Bend, Or

Santa Clara, Ca

Folsom, Ca

Garden Grove, Ca

La Mirada, Ca

Irvine, Ca –

Headquarters

Lowell, Ma

Lawrence, Ma

Ennis, Ireland

Bordeaux, France

Shanghai, China

Hod Hasharon, Israel

Manila, Philippines —

NEW!

Security & Defense

Aerospace

Enterprise & Commercial

Industrial

40%

20%

23%

17%

Security & Defense

Homeland Security,

Enterprise Security & Defense

2010 Microsemi

Aerospace

Enterprise & Commercial

Industrial

Security & Defense

Commercial Air & Satellite

20%

23%

17%

40%

2010 Microsemi

Industrial

17%

40%

20%

23%

Industrial

Security & Defense

Aerospace

Enterprise & Commercial

Alternative Energy,

Medical & Cap Equipment

2010 Microsemi

Enterprise & Commercial

Next-Gen LED Lighting, Display

and Networking

23%

17%

40%

20%

Enterprise & Commercial

Industrial

Security & Defense

Aerospace

Enterprise & Commercial

2010 Microsemi

2010 Microsemi

Market

Alignment

•

Component, Mixed Signal IC and Subsystem

•

FPGA, Processor and Mixed Signal SOC

Product

Portfolio

1 + 1 = 3

Scale

Synergy

•

High Value, High Barrier to Entry Markets

•

Space, Military and Industrial

•

The

world’s

most

complete technology

portfolio

•

Combined SAM $3.1B

A World Class Value Proposition

2010 Microsemi

Questions & Answers

2010 Microsemi

To quote John East:

“The acquisition of Actel

by Microsemi

creates a powerful

combination. I can think of no company more

complementary and better equipped to take Actel’s

solutions to new heights.”

Why did management decide to sell the

company?

2010 Microsemi

What happens now and what are the next steps?

Tender offer launched as of today.

Share holders will be able to tender their shares for next

30 days (20 business days)

Target

date

the

deal

Tuesday,

Nov.

Once the deal is closed, we’ll start our integration phase

–

Welcome to Microsemi Meeting on the closing date

–

Integration Planning

–

Integration team from Actel

and Microsemi to work together

–

Leadership

from

MSCC

will

work

closely

with

Actel

Mgmt

2010 Microsemi

What do you want me to do now?

Continue working as you have. If you are asked to

participate in the business review, share your honest

opinions and knowledge. Ask any question you have as

soon as you have one. We all want to make this

combined organization a stronger, better place to work.

Don’t let important questions go unanswered.

2010 Microsemi

I have questions, how do I get them answered?

We will do our best to get your questions answered. As this

is a transaction dealing with two public companies, there are

legal restrictions about the information we can communicate.

Please send your questions for collection to Actel

HR:

–

Barbara

McArthur:

barbara.mcarthur@actel.com

(650)318-4565

–

All questions will be compiled for responses. The Q & As will be

either posted in the public areas or sent to all via email.

–

If you have a personal question that would only apply to you as an

individual then someone from HR will respond directly to you.

2010 Microsemi

For Actel

Shareholders

No statement in this presentation is an offer to purchase or a solicitation of

an offer to sell securities. Microsemi

and Artful Acquisition Crop. intend to

file

tender

offer

statement

Schedule

with

the

Securities

and

Exchange Commission, and Actel

also intends to file a solicitation/

recommendation statement on Schedule 14D-9, with respect to the tender

offer described herein. Any offers to purchase or solicitations of offers to

sell will be made only pursuant to such tender offer statement. The tender

offer statement (including an offer to purchase, a related letter of transmittal

and other offer documents) and the related solicitation/recommendation

statement will contain important information, including the various terms of,

and conditions to, the tender offer, that should be read carefully by Actel’s

shareholders before they make any decision with respect to the tender

offer. Such materials, when prepared and ready for release, will

be made

available to Actel’s

shareholders at no expense to them. In addition, at such

time such materials (and all other offer documents filed with the SEC) will

be available at no charge on the SEC’s

Web site: www.sec.gov

and may

also

obtained

directing

request

Georgeson

Inc.,

199 Water

Street,

26th

Floor,

New

York,

10038,

(866)

729-6799,

Georgeson

Securities Corporation, 199 Water Street, 26th Floor, New York, NY 10038,

(800) 445-1790.

2010 Microsemi

We look forward to working with you.

Thank you!