Document:

EX-10.1

 Exhibit 10.1 

BANK OF AMERICA, N.A. 

MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED 

One Bryant Park 
 New York, NY 10036

 March 17, 2015 
 Microsemi Corporation

 One Enterprise 
 Aliso Viejo, CA 92656 

			
	Attention:		 John Hohener, Executive Vice President, CFO, Secretary and Treasurer

Steve Litchfield, Executive Vice President and Chief Strategy Officer

 Project Waterloo 

Commitment Letter 
 Ladies and
Gentlemen: 
 Microsemi Corporation (“you” or the “Borrower”) has advised each
of Bank of America, N.A. (“Bank of America”) and Merrill Lynch, Pierce, Fenner & Smith Incorporated (or any of its designated affiliates, “Merrill Lynch” and collectively, the
“Commitment Parties”, “we” or “us”) that you intend to acquire 100% of the outstanding capital stock of a company previously identified to us as “Waterloo” (the
“Acquired Business”) pursuant to a tender offer followed by a merger of a newly created wholly-owned direct or indirect subsidiary of the Borrower (“Merger Sub”) with and into the Acquired Business,
with the Acquired Business surviving such merger as your wholly-owned subsidiary. The Borrower, the Acquired Business and their respective subsidiaries are collectively referred to herein as the “Companies”. 

 You have also advised us that you intend to finance the Acquisition with (i) a $300 million Incremental Term
Loan to the Borrower (the “Incremental Facility”), (ii) cash on hand of the Borrower and the Acquired Business and (iii) if necessary, borrowings by the Borrower of Revolving Loans (the “Revolving Loan
Borrowings”). The Acquisition, the repayment of certain indebtedness of the Acquired Business (including all indebtedness under the Loan Agreement, dated as of August 23, 2007 (as amended, the “Existing Target Loan
Agreement”), between the Acquired Business and Whitebox VSC, Ltd. (the “Target Loan Agreement Agent”) (which repayment for the avoidance of doubt may occur within 4 Business Days following
the Closing Date) (the “Refinancing”), the entering into and funding of the Incremental Facility, any Revolving Loan Borrowings, the payment of the costs and expenses related thereto and all related transactions are
hereinafter collectively referred to as the “Transaction.” The date of consummation of the Acquisition and the funding of the Incremental Facility is referred to herein as the “Closing Date.”

 1. Commitments. In connection with the foregoing, Bank of America is pleased to
advise you of its commitment to provide 100% of the Incremental Facility (in such capacity, the “Initial Incremental Lender”) upon and subject to the terms set forth in this letter, in the Summary of Terms set forth in Annex
I hereto (the “Summary of Terms”) and in Annex II hereto (collectively, the “Commitment Letter”), (b) Merrill Lynch is pleased to advise you of its willingness, and you hereby engage Merrill Lynch
to act as sole and exclusive lead arranger and sole and exclusive bookrunner (in such capacities, the “Lead Arranger”) for the Incremental Facility, and in connection therewith to form a syndicate of lenders

 
for the Incremental Facility (collectively, the “Lenders”) in consultation with you, including Bank of America. You agree that no other agents, co-agents,
arrangers, coarrangers, bookrunners, co-bookrunners, managers or co-managers will be appointed, no other titles will be awarded and no compensation (other than compensation expressly contemplated by this Commitment Letter and the Fee Letter referred
to below) will be paid to any Lender in order to obtain its commitment to participate in the Incremental Facility unless you and we shall so agree. It is understood and agreed that Bank of America and Merrill Lynch will have “lead left”
placement on all marketing materials relating to the Incremental Facility and will perform the duties and exercise the authority customarily performed and exercised by them in such role, including acting as sole manager of the physical books.
Notwithstanding anything herein to the contrary, the commitments of the Initial Incremental Lender in respect of the Incremental Facility and the undertaking of the Lead Arranger to provide the services described herein are subject solely to the
satisfaction of each of the conditions precedent set forth in Section 5 hereof, those set forth under the caption “Conditions Precedent to Incremental Borrowing” in the Summary of Terms and those set forth in Annex II hereto. All
capitalized terms used and not otherwise defined herein shall have the meanings provided in that certain Amended and Restated Credit Agreement, dated as of October 13, 2011, by and among the Borrower, Royal Bank of Canada, as administrative
agent and collateral agent, and the lenders party thereto (as amended, restated, amended and restated, extended, supplemented or otherwise modified from time to time, the “Existing Credit Agreement”). 

2. Syndication. The Lead Arranger intends to commence syndication of the Incremental Facility
after your acceptance of the terms of this Commitment Letter and the Fee Letter related to the Incremental Facility. You agree to actively assist the Lead Arranger in achieving a syndication of the Incremental Facility that is reasonably
satisfactory to the Lead Arranger until the earlier of Successful Syndication (as defined in the Fee Letter) and 90 days following the Closing Date; provided that we agree that the Commitment Parties’
commitments hereunder are not conditioned upon the syndication of, or receipt of commitments in respect of, the Incremental Facility and in no event shall the commencement or successful completion of the syndication of the Incremental Facility
constitute a condition to the availability of the Incremental Facility on the Closing Date; provided that, notwithstanding the Lead Arranger’s rights to syndicate the Incremental Facility and receive
commitments with respect thereto, no assignment shall become effective with respect to all or any portion of the Commitment Parties’ commitments in respect of the Incremental Facility until the funding of the Incremental Facility by such
assignees and, unless you otherwise agree in writing, Bank of America shall retain exclusive control over all rights and obligations with respect to its commitment, including all rights with respect to consents, modifications, supplements, waivers
and amendments, until the Closing Date has occurred. Such assistance shall include (a) your providing and causing your advisors to provide, and using your commercially reasonable efforts to cause the Acquired Business, its subsidiaries and its
advisors to provide, the Lead Arranger and the Lenders upon request with all information reasonably deemed necessary by the Lead Arranger to complete such syndication, including, but not limited to, information and evaluations prepared by you, the
Acquired Business and your and its advisors, or on your or its behalf, relating to the Transaction (including the Projections (as hereinafter defined) for each quarter for the first fiscal year following the Closing Date and for each year commencing
with the first fiscal year following the Closing Date for the term of the Incremental Facility), (b) your preparation of an information memorandum with respect to the Incremental Facility for both Public Lenders and Private Lenders, in each
case in form and substance customary for transactions of this type and otherwise reasonably satisfactory to the Lead Arranger (each, an “Information Memorandum”) and other materials to be used in connection with the
syndication of the Incremental Facility, (c) your using your commercially reasonable efforts to ensure that the syndication efforts of the Lead Arranger benefit materially from your existing lending relationships and the existing lending
relationships of the Acquired Business, (d) your using commercially reasonable efforts to obtain prior to the commencement of the Marketing Period (as hereinafter defined), monitored public corporate credit or family ratings of the Borrower
after giving effect to the Transaction and ratings of the Incremental Facility 

  
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from Moody’s Investors Service, Inc. (“Moody’s”) and Standard & Poor’s, a division of The McGraw-Hill Companies, Inc.
(“S&P”) and (e) your otherwise using your commercially reasonable efforts to assist the Lead Arranger in its syndication efforts, including by making your officers and advisors, and using your commercially reasonable
efforts to make officers and advisors of the Acquired Business, available from time to time to attend and make presentations regarding the business and prospects of the Companies and the Transaction at one or more meetings of prospective
Lenders. 
 It is understood and agreed that the Lead Arranger will manage and control, in consultation with you, the
syndication of the Incremental Facility, including decisions as to the selection of prospective Lenders and any titles offered to proposed Lenders, when commitments will be accepted and the final allocations of commitments among the Lenders. It is
understood that no Lender participating in the Incremental Facility will receive compensation from you in order to obtain its commitment, except on the terms contained herein, in the Summary of Terms and in the Fee Letter. It is also understood and
agreed that the amount and distribution of the fees among the Lenders will be at your discretion. 
 Prior to and until the earlier of the
date (i) that a Successful Syndication (as defined in the Fee Letter) has been achieved and (ii) 90 days after the Closing Date, none of the Companies shall syndicate or issue, attempt to syndicate or issue, announce or authorize the
announcement of the syndication or issuance of, any debt of the Companies (other than the Incremental Facility or Incremental Term Loans in the form of term A loans arranged by Bank of America), including any renewals or refinancings of any existing
debt, that would materially and adversely affect the syndication of the Incremental Facility without the prior written consent of the Lead Arranger. 

3. Information Requirements. You hereby represent, warrant and covenant that (to the best of your knowledge with respect to the
Acquired Business), (a) all written information, other than Projections (as defined below), that has been or is hereafter made available to the Lead Arranger or any of the Lenders by or on behalf of you or any of your representatives or by or
on behalf of the Acquired Business or any of its representatives in connection with any aspect of the Transaction, taken as a whole (the “Information”), is, or will be when furnished, correct in all material respects and does
not and will not, when furnished, contain any untrue statement of a material fact or omit to state a material fact necessary in order to make the statements contained therein not materially misleading in light of the circumstances under which such
statements are made and (b) all financial projections and other forward looking information concerning the Companies that have been or are hereafter made available to the Lead Arranger or any of the Lenders by or on behalf of you or any of your
representatives or by or on behalf of the Acquired Business or its representatives (the “Projections”) have been or will be prepared in good faith based upon assumptions that you believe to be reasonable at the time made and
at the time furnished; it being understood that the Projections are as to future events and are not to be viewed as facts and that actual results during the period or periods covered by any such Projections may differ significantly from the
projected results and such differences may be material. You agree that if at any time prior to the Closing Date and, thereafter, until the earlier to occur of (i) a Successful Syndication (but not earlier than the Closing Date) and (i) 90
days following the Closing Date, you become aware that any of the representations in the preceding sentence would be incorrect in any material respect if the Information and Projections were being furnished, and such representations were being made,
at such time, then you will promptly supplement, or cause to be supplemented, the Information and Projections so that such representations will be correct in all material respects at such time. In issuing this commitment and in arranging and
syndicating the Incremental Facility, the Commitment Parties are and will be using and relying on the Information and the Projections without independent verification thereof. 

You acknowledge that (a) the Commitment Parties on your behalf will make available Information Materials to the proposed syndicate of
Lenders by posting the Information, the Projections, the 

  
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Summary of Terms and any additional summary of terms prepared for distribution to Public Lenders (as hereinafter defined) (collectively, the “Information Materials”) on
IntraLinks or another similar electronic system and (b) certain prospective Lenders (such Lenders, “Public Lenders”; all other Lenders, “Private Lenders”) may have personnel that do not wish to
receive material non-public information (within the meaning of the United States federal securities laws with respect to the Companies, their respective affiliates or any other entity, or the respective securities of any of the foregoing
“MNPI”), and who may be engaged in investment and other market-related activities with respect to such entities’ securities. If requested by the Lead Arranger, you will assist us in preparing a customary additional
version of the Information Materials not containing MNPI (the “Public Information Materials”) to be distributed to prospective Public Lenders. 

Before distribution of any Information Materials (a) to prospective Private Lenders, you shall provide us with a customary letter
authorizing the dissemination of the Information Materials, (b) to prospective Public Lenders, you shall provide us with a customary letter authorizing the dissemination of the Public Information Materials and confirming the absence of MNPI
therefrom and (c) the Information Memorandum shall exculpate (x) us with respect to any liability related to the use and (y) us, you and the Companies with respect to the misuse, in each case, of the contents of the Information
Memorandum or any related marketing material by the recipients thereof. In addition, at our request, you shall identify Public Information Materials by clearly and conspicuously marking the same as “PUBLIC”. 

You agree that the Lead Arranger on your behalf may, subject to the confidentiality and other provisions of this Commitment Letter, distribute
the following documents to all prospective Lenders, unless you or your counsel advise the Lead Arranger in writing (including by email) within a reasonable time prior to their intended distributions that such material should only be distributed to
prospective Private Lenders: (a) administrative materials for prospective Lenders such as lender meeting invitations and funding and closing memoranda, (b) notifications of changes to the terms of the Incremental Facility and
(c) other materials intended for prospective Lenders after the initial distribution of the Information Materials, including drafts and final versions of definitive documents with respect to the Incremental Facility. If you advise us that any of
the foregoing items should be distributed only to Private Lenders, then the Lead Arranger will not distribute such materials to Public Lenders without further discussions with you. You agree that Information Materials made available to prospective
Public Lenders in accordance with this Commitment Letter shall not contain MNPI. 
 4. Fees and Indemnities. 

(a) You agree to pay the fees set forth in the Fee Letter. You also agree to reimburse the Commitment Parties from time to time on demand for
all reasonable and documented out-of-pocket fees and expenses (including, but not limited to, the reasonable fees, disbursements and other charges of Cahill Gordon & Reindel LLP, as counsel to the Lead Arranger, and with
respect to each appropriate jurisdiction, of one local counsel to the Lenders retained by the Lead Arranger and the reasonable due diligence expenses) incurred in connection with the Incremental Facility, the syndication thereof, the preparation of
the Incremental Documentation therefor and the other transactions contemplated hereby, whether or not the Closing Date occurs or any Incremental Documentation is executed and delivered or any extensions of credit are made under the Incremental
Facility. You acknowledge that we may receive a benefit, including without limitation, a discount, credit or other accommodation, from any of such counsel based on the fees such counsel may receive on account of their relationship with us including,
without limitation, fees paid pursuant hereto. 
 (b) You also agree to indemnify and hold harmless each of the Commitment Parties, and each
of their affiliates, successors and assigns and their respective officers, directors, employees, 

  
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agents, advisors and other representatives (each, an “Indemnified Party”) from and against (and will reimburse each Indemnified Party as the same are incurred for) any and
all claims, damages, losses, liabilities and expenses (including, without limitation, the reasonable fees, disbursements and other charges of one primary counsel, one regulatory counsel (to the extent reasonably necessary), with respect to each
appropriate jurisdiction, one local counsel and, in the case of an actual or perceived conflicts of interest, one conflicts counsel to all affected Indemnified Parties, taken as a whole) that may be incurred by or asserted or awarded against any
Indemnified Party, in each case arising out of or in connection with or by reason of (including, without limitation, in connection with any investigation, litigation or proceeding or preparation of a defense in connection therewith) (i) any
matters contemplated by this Commitment Letter or (ii) the Incremental Facility or any use made or proposed to be made with the proceeds thereof, except to the extent such claim, damage, loss, liability or expense is found in a final,
non-appealable judgment by a court of competent jurisdiction to have resulted from (i) such Indemnified Party’s gross negligence, bad faith or willful misconduct, (ii) a material breach of this Commitment Letter by such Indemnified
Party or (iii) any proceeding not arising from any act or omission by the Borrower or its affiliates that is brought by an Indemnified Person against any other Indemnified Person (other than disputes involving claims against the Lead Arranger
or Administrative Agent in its capacity as such). In the case of a litigation, investigation or proceeding (any of the foregoing, a “Proceeding”) to which the indemnity in this paragraph applies, such indemnity shall be
effective whether or not such Proceeding is brought by you, your equity holders or creditors or an Indemnified Party, whether or not an Indemnified Party is otherwise a party thereto and whether or not any aspect of the Transaction is consummated.
You also agree that no Indemnified Party shall have any liability to you, the Acquired Business or your or their subsidiaries or affiliates or to your or their respective equity holders or creditors for any special, indirect, consequential or
punitive damages arising out of, related to or in connection with any aspect of the Transaction. You shall have no liability to an Indemnified Party for any special, indirect, consequential or punitive damages, provided that the foregoing
shall not limit your indemnification obligations set forth above. It is further agreed that the Commitment Parties shall only have liability to you (as opposed to any other person). Notwithstanding any other provision of this Commitment Letter, no
Indemnified Party shall be liable for any damages arising from the use by others of information or other materials obtained through electronic telecommunications or other information transmission systems, other than for direct, actual damages
resulting from (i) the gross negligence or willful misconduct of such Indemnified Party or (ii) a material breach of this Commitment Letter by such Indemnified Party, in each case as determined by a final, non-appealable judgment of a
court of competent jurisdiction. You shall not, without the prior written consent of an Indemnified Party (which consent shall not be unreasonably withheld or delayed), effect any settlement of any pending or threatened Proceeding against an
Indemnified Party in respect of which indemnity could have been sought hereunder by such Indemnified Party unless such settlement (i) includes an unconditional release of such Indemnified Party from all liability or claims that are the subject
matter of such Proceeding and (ii) does not include any statement as to any admission of fault, culpability, wrong doing or a failure to act by or on behalf of such Indemnified Party. 

5. Conditions to Financing. The commitment of the Initial Incremental Lender in respect of
the Incremental Facility and the undertaking of the Lead Arranger to provide the services described herein are subject solely to the satisfaction of each of the conditions set forth under the caption “Conditions Precedent to Incremental
Borrowing” in the Summary of Terms, in Annex II hereto and each of the following conditions precedent: (a) you shall have accepted the separate fee letter addressed to you dated the date hereof from the Commitment Parties (the
“Fee Letter”); (b) the negotiation of the Incremental Term Joinder (as defined in Annex I hereto) with respect to the Incremental Facility consistent with this Commitment Letter and the Fee Letter (the
“Incremental Documentation”) and the execution and delivery of the Incremental Documentation by the Borrower and the Subsidiary Guarantors; (c) the conditions specified in Sections 2.4(a) and 6.2(c) of the Existing
Credit Agreement, those set forth under the caption “Conditions Precedent to Incremental Borrowing” in the Summary of Terms and those set forth in Annex

  
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II hereto (subject to the Certain Funds Provisions below); and (d) compliance with Section 8.7(i) of the Existing Credit Agreement. It is hereby understood and
agreed that any obligation of Companies to deliver Collateral related to the Acquired Business and its subsidiaries or for any of the Acquired Business or its subsidiaries to become Subsidiary Guarantors shall be as set forth in Sections 7.10
and 7.11 of the Existing Credit Agreement (but in any event shall occur within 30 days following the Closing Date) and shall not be a condition precedent to the Incremental Facility. 

Notwithstanding anything in this Commitment Letter, the Fee Letter, the Incremental Documentation or any other letter agreement
or other undertaking concerning the financing of the Transaction to the contrary, the only representations the accuracy of which shall be a condition to the availability of the Incremental Facility on the Closing Date shall be (i) the
representations made by or with respect to the Acquired Business and its subsidiaries in the Acquisition Agreement (as hereinafter defined) as are material to the interests of the Lenders, but only to the extent that you have the right to terminate
your obligations under the Acquisition Agreement, or to decline to consummate the Acquisition pursuant to the Acquisition Agreement, as a result of a breach of such representations in the Acquisition Agreement (the “Acquisition Agreement
Representations”) and (ii) the representations set forth in Sections 5.3 (Corporate Existence; Compliance with Law), 5.4 (Power; Authorization; Enforceable Obligations), 5.5 (No Legal Bar), 5.11 (Federal Regulations), 5.14
(Investment Company Act; Other Regulations), 5.19 (Security Documents), 5.20 (Solvency), 5.21 (Senior Indebtedness) and 5.23 (Anti-Terrorism Laws) of the Existing Credit Agreement. This paragraph, and the provisions herein, shall be referred to as
the “Certain Funds Provisions”. 
 6. Confidentiality and Other Obligations. This Commitment
Letter and the Fee Letter and the contents hereof and thereof are confidential and, may not be disclosed in whole or in part to any person or entity without our prior written consent except (i) on a confidential basis to your officers,
directors, employees, accountants, attorneys and other professional advisors in connection with the Transaction, (ii) pursuant to the order of any court or administrative agency in any pending legal or administrative proceeding, or otherwise as
required by applicable law or compulsory legal process (in which case, to the extent permitted by law, you agree to inform us promptly thereof) or to the extent requested or required by governmental and/or regulatory authorities, (iii) you may
disclose this Commitment Letter and the contents hereof to the Acquired Business and its officers, directors, employees, attorneys, accountants and advisors, on a confidential and need-to-know basis, (iv) you may disclose the Commitment Letter
(but not the Fee Letter) and its contents in any proxy or other public filing relating to the Acquisition in a manner to be mutually agreed upon, (v) you may disclose this Commitment Letter (but not the Fee Letter), and the contents hereof, to
rating agencies, (vi) you may disclose the fees contained in the Fee Letter as part of a generic disclosure of aggregate sources and uses related to fee amounts to the extent customary or required in marketing materials, any proxy or other
public filing or any prospectus or other offering memorandum and (vii) to the extent portions thereof have been redacted in a manner to be mutually agreed upon, you may disclose the Fee Letter and the contents thereof to the Acquired Business
and its officers, directors, employees, attorneys, accountants and advisors, on a confidential and need-to-know basis. 
 The Commitment
Parties shall use all confidential information provided to them by or on behalf of you hereunder solely for the purpose of providing the services which are the subject of this letter agreement and otherwise in connection with the Transaction and
shall treat confidentially all such information; provided, however, that nothing herein shall prevent the Commitment Parties from disclosing any such information (i) pursuant to the order of any court or administrative agency or
in any pending legal or administrative proceeding, or otherwise as required by applicable law or compulsory legal process (in which case the Commitment Parties agree to inform you promptly thereof prior to such disclosure to the extent not
prohibited by law, rule or regulation), (ii) upon the request or demand of any regulatory authority 

  
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having jurisdiction over the Commitment Parties or any of their respective affiliates (in which case the Commitment Parties agree, except with respect to any audit or examination conducted by
bank accountants or any governmental, regulatory or self-regulatory authority exercising examination or regulatory authority, to inform you promptly thereof prior to such disclosure to the extent not prohibited by law, rule or regulation),
(iii) to the extent that such information is or becomes publicly available other than by reason of disclosure in violation of this agreement by the Commitment Parties, (iv) to the Commitment Parties’ affiliates and its and their
respective directors, officers, employees, legal counsel, independent auditors and other experts or agents who need to know such information in connection with the Transaction and are informed of the confidential nature of such information and are
directed to comply with the terms of this paragraph, (v) for purposes of establishing a “due diligence” defense, (vi) to the extent that such information is received by the Commitment Parties from a third party that is not to the
Commitment Parties’ knowledge subject to confidentiality obligations to you, (vii) to the extent that such information is independently developed by the Commitment Parties, (viii) to potential Lenders, participants, assignees or any
direct or indirect contractual counterparties to any swap or derivative transaction relating to you or your obligations under the Incremental Facility, in each case, who agree to be bound by the terms of this paragraph (or on substantially the terms
set forth in this paragraph or as otherwise reasonably acceptable to you and each Commitment Party, including as may be agreed in any confidential information memorandum or other marketing material), (ix) to Moody’s and S&P and to
Bloomberg, LSTA and similar market data collectors with respect to the syndicated lending industry; provided that such information is limited to Annex I and is supplied only on a confidential basis or (x) with your prior written consent.
This paragraph shall terminate on the second anniversary of the date hereof (the “Execution Date”). 
 You
acknowledge that the Commitment Parties or their affiliates may be providing financing or other services to parties whose interests may conflict with yours. The Commitment Parties agree that they will not furnish confidential information obtained
from you to any of their other customers and will treat confidential information relating to the Companies and their respective affiliates with the same degree of care as they treat their own confidential information. The Commitment Parties further
advise you that they will not make available to you confidential information that they have obtained or may obtain from any other customer. In connection with the services and transactions contemplated hereby, you agree that the Commitment Parties
are permitted to access, use and share with any of their bank or non-bank affiliates, agents, advisors (legal or otherwise) or representatives any information concerning the Companies or any of their respective affiliates that is or may come into
the possession of the Commitment Parties or any of such affiliates. 
 In connection with all aspects of each transaction contemplated by
this Commitment Letter, you acknowledge and agree, and acknowledge your affiliates’ understanding, that: (i) the Incremental Facility and any related arranging or other services described in this Commitment Letter is an arm’s-length
commercial transaction between you and your affiliates, on the one hand, and the Commitment Parties, on the other hand, (ii) the Commitment Parties have not provided any legal, accounting, regulatory or tax advice with respect to any of the
transactions contemplated hereby and you have consulted your own legal, accounting, regulatory and tax advisors to the extent you have deemed appropriate, (iii) you are capable of evaluating, and understand and accept, the terms, risks and
conditions of the transactions contemplated hereby, (iv) in connection with each transaction contemplated hereby and the process leading to such transaction, each of the Commitment Parties has been, is, and will be acting solely as a principal
and has not been, is not, and will not be acting as an advisor, agent or fiduciary, for you or any of your affiliates, stockholders, creditors or employees or any other party, (v) the Commitment Parties have not assumed and will not assume an
advisory, agency or fiduciary responsibility in your or your affiliates’ favor with respect to any of the transactions contemplated hereby or the process leading thereto (irrespective of whether any of the Commitment Parties has advised or is
currently advising you or your affiliates on other matters) and the Commitment Parties have no obligation to you or your affiliates with respect to 

  
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the transactions contemplated hereby except those obligations expressly set forth in this Commitment Letter and (vi) the Commitment Parties and their respective affiliates may be engaged in
a broad range of transactions that involve interests that differ from yours and those of your affiliates, and the Commitment Parties have no obligation to disclose any of such interests to you or your affiliates. To the fullest extent permitted by
law, you hereby waive and release any claims that you may have against the Commitment Parties with respect to any breach or alleged breach of agency or fiduciary duty in connection with any aspect of any transaction contemplated by this Commitment
Letter. 
 The Commitment Parties hereby notify you that pursuant to the requirements of the USA PATRIOT Act, Title III of
Pub. L. 107-56 (signed into law October 26, 2001) (the “U.S.A. Patriot Act”), each of them is required to obtain, verify and record information that identifies you and the Subsidiary Guarantors, which information
includes your and each Subsidiary Guarantor’s name and address and other information that will allow the Commitment Parties, as applicable, to identify you and such Subsidiary Guarantors in accordance with the U.S.A. Patriot Act.

 7. Survival of Obligations. The provisions of Sections 2, 3, 4, 6 and 7 shall remain in full force and effect regardless
of whether any Incremental Documentation shall be executed and delivered and notwithstanding the termination of this Commitment Letter or any commitment or undertaking of the Commitment Parties hereunder, provided that the provisions of
paragraphs 2 and 3 shall not survive if the commitments and undertakings of the Commitment Parties are terminated prior to the effectiveness of the Incremental Facility. 

8. Miscellaneous. This Commitment Letter and the Fee Letter may be executed in multiple counterparts and by different parties
hereto in separate counterparts, all of which, taken together, shall constitute an original. Delivery of an executed counterpart of a signature page to this Commitment Letter or the Fee Letter by telecopier, facsimile or other electronic
transmission (e.g., a “pdf” or “tiff”) shall be effective as delivery of a manually executed counterpart thereof. Headings are for convenience of reference only and shall not affect the construction of, or be
taken into consideration when interpreting, this Commitment Letter or the Fee Letter. 
 This Commitment Letter and the Fee Letter
shall be governed by, and construed in accordance with, the laws of the State of New York. Each party hereto hereby irrevocably waives any and all right to trial by jury in any action, proceeding or counterclaim (whether based on contract, tort or
otherwise) arising out of or relating to this Commitment Letter, the Fee Letter, the Transaction and the other transactions contemplated hereby and thereby or the actions of the Commitment Parties in the negotiation, performance or enforcement
hereof. Each party hereto hereby irrevocably and unconditionally submits to the exclusive jurisdiction of any New York State court or Federal court of the United States of America sitting in the Borough of Manhattan in New York City in respect of
any suit, action or proceeding arising out of or relating to the provisions of this Commitment Letter, the Fee Letter, the Transaction and the other transactions contemplated hereby and thereby and irrevocably agrees that all claims in respect of
any such suit, action or proceeding shall be heard and determined in any such court. The parties hereto agree that service of any process, summons, notice or document by registered mail addressed to you shall be effective service of process against
you for any suit, action or proceeding relating to any such dispute. Each party hereto waives, to the fullest extent permitted by applicable law, any objection that it may now or hereafter have to the laying of the venue of any such suit, action or
proceedings brought in any such court, and any claim that any such suit, action or proceeding brought in any such court has been brought in an inconvenient forum. A final judgment in any such suit, action or proceeding brought in any such court may
be enforced in any other courts to whose jurisdiction you are or may be subject by suit upon judgment. 

  
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 This Commitment Letter, together with the Fee Letter, embodies the entire agreement and
understanding among the parties hereto and your affiliates with respect to the Incremental Facility and supersedes all prior agreements and understandings relating to the subject matter hereof. No party has been authorized by the Commitment Parties
to make any oral or written statements that are inconsistent with this Commitment Letter. Neither this Commitment Letter (including the attachments hereto) nor the Fee Letter may be amended or any term or provision hereof or thereof waived or
modified except by an instrument in writing signed by each of the parties hereto. 
 This Commitment Letter may not be assigned by either
party without the prior written consent of each other party other than an assignment by a Commitment Party to its affiliate as provided in the following sentence (and any purported assignment without such consent will be null and void), is intended
to be solely for the benefit of the parties hereto and is not intended to confer any benefits upon, or create any rights in favor of, any person other than the parties hereto (and the Indemnified Parties). Each Commitment Party may assign its
commitment hereunder, in whole or in part, to any of its affiliates; provided that such Commitment Party shall not be released from the portion of its commitment hereunder so assigned to the extent such assignee fails to fund the portion of the
commitment assigned to it on the Closing Date notwithstanding the satisfaction of the conditions to funding set forth herein; provided, further, that unless you otherwise agree in writing, each Commitment Party shall retain exclusive
control over all rights and obligations with respect to its commitment, including all rights with respect to consents, modifications, supplements, waivers and amendments, until the Closing Date has occurred. In addition, the Commitment Parties may
employ the services of affiliates or branches, and such affiliates or branches shall be entitled to the benefits afforded to, and subject to the provisions governing the conduct of, the Commitment Parties. 

The commitments and undertakings of the Commitment Parties hereunder will expire on the earliest of (a) July 17, 2015, unless the
Closing Date occurs on or prior thereto, (b) the closing of the Acquisition without the use of the Incremental Facility and (c) the termination of the Acquisition Agreement. 

[The remainder of this page intentionally left blank.] 

  
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 We are pleased to have the opportunity to work with you in connection with this important
financing. 
  

			
	Very truly yours,
	
	BANK OF AMERICA, N.A.
		
	By:		 /s/ Douglas M. Ingram

			Name: Douglas M. Ingram
			Title: Managing Director
	
	MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED
		
	By:		 /s/ Douglas M. Ingram

			Name: Douglas M. Ingram
			Title: Managing Director

 Signature Page to Project Waterloo Commitment Letter 

			
	Accepted and agreed to as of the date first written above:
	
	MICROSEMI CORPORATION
		
	By:		 /s/ John Hohener

			Name: John Hohener
			Title: Chief Financial Officer

 Signature Page to Project Waterloo Commitment Letter 

 ANNEX I 

SUMMARY OF TERMS AND CONDITIONS

INCREMENTAL CREDIT FACILITIES 

The Incremental Facility will be provided pursuant to an incremental joinder (the “Incremental Term
Joinder”) to the Existing Credit Agreement. 
  

			
	Borrower of Incremental Term Loans:		Microsemi Corporation, a Delaware corporation (the “Borrower”).
		
	Subsidiary Guarantors:		Identical to the Existing Credit Agreement. The incremental term loans under the Incremental Facility will be guaranteed on a pari passu basis with the existing term loans under the Existing Credit Agreement.
		
	Lead Arranger and Bookrunning Manager:		Merrill Lynch, Pierce, Fenner & Smith Incorporated (or any of its affiliates) (“Merrill Lynch”) will act as sole lead arranger and sole bookrunning manager for the Incremental
Facility (the “Lead Arranger”).
		
	Lenders:		Bank of America and other banks, financial institutions and institutional lenders selected by the Lead Arranger in consultation with the Borrower.
		
	Incremental Facility:		An aggregate principal amount of up to $300 million term loan facility, all of which will be drawn on the Closing Date consisting of a $300 million Incremental Term Loan to the Borrower (the “Incremental
Facility”).
		
	Purpose:		The proceeds of the borrowings under the Incremental Facility on the Closing Date will be used, together with the proceeds of the Revolving Loan Borrowings (if any) and cash on hand, to (i) finance the Acquisition, (ii) fund the
Refinancing and (iii) pay fees and expenses incurred in connection with the Transaction.
		
	Interest Rates:		The interest rates per annum applicable to the Incremental Facility will be, at the option of the Borrower, (i) the Eurodollar Rate (which shall include a floor of 0.75%) plus 2.75% or (ii) the Base Rate plus 1.75%.
		
	Calculation of Interest and Fees:		Consistent with the Existing Credit Agreement.
		
	Cost and Yield Protection:		Consistent with the Existing Credit Agreement.
		
	Maturity:		February 19, 2020 (identical to the maturity date of the New Term Loans and Existing Incremental Term Loans under the Existing Credit Agreement).

  
 Annex I-1 

			
	Scheduled Amortization:		Loans under the Incremental Facility will amortize in equal quarterly installments (commencing with the end of the first fiscal quarter ending after the Closing Date) in an aggregate annual amount equal to 1.0% of the original
principal amount of the Incremental Facility with the balance payable on the maturity date of the Incremental Facility.
		
	Mandatory Prepayments and Commitment Reductions:		Consistent with the Existing Credit Agreement.
		
	Optional Prepayments and Commitment Reductions:		Consistent with the Existing Credit Agreement, including a premium of 1.00% of the aggregate principal amount of an optional prepayment prior to the 6 month anniversary of the Closing Date (on terms consistent with the optional
prepayment premium applicable to New Term Loans as set forth in the Existing Credit Agreement).
		
	Security:		The loans under the Incremental Facility will be secured on a pari passu basis with the Term Loans under the Existing Credit Agreement.
		
	Conditions Precedent to Incremental Borrowing:		The availability of the extensions of credit under the Incremental Facility on the Closing Date will be subject solely to (i) the making and accuracy of the representations and warranties set forth in Incremental Documentation,
subject to the Certain Funds Provisions, in all material respects, (ii) the conditions set forth in Annex II to the Commitment Letter and (iii) the conditions set forth in Section 5 of the Commitment Letter.
		
	Amendment Documentation:		The Incremental Documentation shall meet the requirements of the Existing Credit Agreement and contain the terms set forth in this Annex I (subject to the “Market Flex Provisions” under the Fee Letter) and, to the
extent any other terms are not expressly set forth in this Annex I, will be negotiated in good faith, shall be customary for transactions of this nature and reasonably satisfactory to the Borrower, the Lead Arranger, the Administrative Agent and the
lenders party thereto.
		
	Representations and Warranties:		Consistent with the Existing Credit Agreement.
		
	Covenants:		Consistent with the Existing Credit Agreement.
		
	Events of Default:		Consistent with the Existing Credit Agreement.
		
	Assignments and Participations:		Consistent with the Existing Credit Agreement.
		
	Waivers and Amendments:		Consistent with the Existing Credit Agreement.
		
	Indemnification:		Consistent with the Existing Credit Agreement.

  
 Annex I-2 

			
	Governing Law:		Consistent with the Existing Credit Agreement.
		
	Costs and Yield Protection:		Consistent with the Existing Credit Agreement.
		
	Expenses:		Consistent with the Existing Credit Agreement.
		
	Counsel to the Lead Arranger:		Cahill Gordon & Reindel LLP.

  
 Annex I-3 

 ANNEX II 

CONDITIONS PRECEDENT TO CLOSING 

Capitalized terms not otherwise defined herein have the same meanings as specified therefor in the Commitment Letter to which this Annex II is
attached. 
 The initial extensions of credit under the Incremental Facility will be subject to the following: 

(i) The Acquisition shall have been or, substantially concurrently with the borrowing under the Incremental Facility shall be,
consummated in accordance in all material respects with the terms of the definitive agreement relating to the Acquisition (including all schedules and exhibits thereto) (together, the “Acquisition Agreement”),
without giving effect to any modifications, amendments or express waivers thereto that are materially adverse to the Lenders without the consent of the Lead Arranger (not to be unreasonably withheld, delayed or conditioned) (it being understood and
agreed that any reduction in the purchase price shall not be deemed to be materially adverse to the Lenders but any such reduction in excess of $25,000,000 shall be allocated dollar-for-dollar to reduce the Incremental Facility). 

(ii) With respect to the Acquired Business and its subsidiaries, no Effect (as defined in the Acquisition Agreement in effect
as of the date hereof), since the date of the Acquisition Agreement shall have occurred that has had, or is reasonably likely to have, a Material Adverse Effect (as defined in the Acquisition Agreement in effect as of the date hereof), which Effect
(as defined in the Acquisition Agreement in effect as of the date hereof) is continuing. 
 (iii) The Lead Arranger shall
have received a solvency certificate in the form of Exhibit J to the Existing Credit Agreement, executed as of the Closing Date by the chief financial officer of the Borrower. 

(iv) The Lead Arranger and the Administrative Agent shall have received (a) customary opinions of counsel to the Borrower
and the Subsidiary Guarantors (which shall cover, among other things, authority, legality, validity, binding effect and enforceability of the documents for the Incremental Facility and the continued perfection of the liens granted thereunder on the
Collateral) and such customary corporate resolutions, certificates, borrowing notices and other closing documents and (b) satisfactory evidence that the Administrative Agent (on behalf of the Lenders) shall have a valid and perfected first
priority (subject to certain exceptions to be set forth in the Incremental Documentation) lien and security interest in the Capital Stock of Merger Sub substantially concurrently with the borrowing under the Incremental Facility and in the other
Collateral (it being understood that the Borrower shall cause the Acquired Business to create and perfect the Collateral of the Acquired Business; provided that to the extent any security interest in the intended Collateral of the Acquired
Business is not provided on the Closing Date (because the Refinancing does not occur on the Closing Date or otherwise) after your use of commercially reasonable efforts to do so, the provision of such perfected security interest(s) shall not
constitute a condition precedent to the availability of the Incremental Facility on the Closing Date but shall be required to be delivered after the Closing Date pursuant to arrangements to be mutually agreed). 

(v) The Lead Arranger shall have received (A) the consolidated balance sheet, the related consolidated statements of
operations, cash flows and shareholders’ equity of the Borrower for the last three fiscal years ended at least 90 days prior to the Closing Date, accompanied by an 

  
 Annex II-1 

 
unqualified report thereon of the Borrower’s auditors; (B) an unaudited balance sheet and related statements of operations and cash flows of the Borrower and related statements of
operations and cash flows of the Borrower for the comparable periods of the prior fiscal year for each fiscal quarter of the Borrower (other than the fourth fiscal quarter) ended after the close of its most recent fiscal year and at least 45 days
prior to the Closing Date; (C) the consolidated balance sheet, the related consolidated statements of operations, cash flows and shareholders’ equity of the Acquired Business for the last three fiscal years ended at least 90 days prior to
the Closing Date, accompanied by an unqualified report thereon of Acquired Business’s auditors, (D) an unaudited balance sheet and related statements of operations and cash flows of the Acquired Business and related statements of
operations and cash flows of the Acquired Business for the comparable periods of the prior fiscal year for the fiscal quarter ended December 31, 2014 and each subsequent fiscal quarter of the Acquired Business (other than the fourth fiscal
quarter) ended after the close of its most recent fiscal year and at least 45 days prior to the Closing Date and (E) a pro forma balance sheet and related statement of operations of the Borrower and its subsidiaries (including the Acquired
Business) as of and for the twelve-month period ending with the latest quarterly or annual period of the Borrower covered by the financial statements set forth in clauses (A) and (B) above, in each case after giving effect to the
Transaction, all of which financial statements shall be prepared in accordance with generally accepted accounting principles in the United States and comply with in all material respects the requirements of Regulation S-X under the Securities Act.
The Lead Arranger acknowledges receipt of the financial statements referred to in clauses (A) and (C) above and the financial statements for the fiscal quarter ended December 31, 2014 of the Borrower referred to in clause
(B) above and of the Acquired Business referred to in clause (D) above. 
 (vi) All fees due to the Administrative
Agent, the Lead Arranger and the Lenders on the Closing Date shall have been paid, and all expenses to be paid or reimbursed to the Administrative Agent and the Lead Arranger shall have been paid; provided, in each case, that such payment may
be made from the proceeds of the initial funding under the Facilities on the Closing Date. 
 (vii) The Administrative Agent
shall have received a notice (as described in Section 2.4(a) of the Existing Credit Agreement and as required by Section 6.2(d) of the Existing Credit Agreement) with respect to the Incremental Term Facility in accordance with the terms of
the Existing Credit Agreement. 
 (viii) The Lead Arranger shall have received from the Borrower a complete Information
Memorandum not later than 15 consecutive business days prior to the Closing Date (the “Marketing Period”); provided that July 3, 2015 shall not be considered a business day for this purpose. 

(ix) An irrevocable notice under the Existing Target Loan Agreement to effect the Refinancing no later than four
(4) Business Days following the Closing Date shall have been sent to the Target Loan Agreement Agent substantially concurrently with the borrowing under the Incremental Facility. After giving effect to the Transaction and the Refinancing, the
Acquired Business and its subsidiaries shall have no outstanding indebtedness or preferred stock other than indebtedness permitted to be outstanding in accordance with the terms of the Acquisition Agreement, existing capital leases, intercompany
debt, purchase money debt and other exceptions to be reasonably agreed by Lead Arranger. 
 (x) The Borrower and each of the
Subsidiary Guarantors and the Acquired Business and its subsidiaries shall have provided at least three business days prior to the Closing Date the documentation and other information to the Administrative Agent that are required by regulatory

  
 Annex II-2 

 
authorities under applicable “know-your-customer” rules and regulations, including the Patriot Act, that have been requested in writing by the Administrative Agent at least five
business days prior to the Closing Date. 
 (xi) Following the date hereof, there shall have been no amendments to the
Existing Credit Agreement that are materially adverse to the Initial Incremental Lender without the consent of the Initial Incremental Lender. 

  
 Annex II-3EX-10.2

 Exhibit 10.2 

TENDER AND SUPPORT AGREEMENT 

TENDER AND SUPPORT AGREEMENT (this “Agreement”) dated as of March 17 2015 between Microsemi Corporation, a Delaware
corporation (“Parent”), LLIU100 Acquisition Corp., a Delaware corporation and wholly-owned subsidiary of Parent (“Purchaser”), and certain stockholders of Vitesse Semiconductor Corporation, a Delaware corporation
(the “Company”), listed on Annex I (each, a “Stockholder”), each an owner of Company Shares. 

RECITALS 
 WHEREAS, as of the
date hereof, each Stockholder on Annex I is the holder of the number of Company Shares, Company Stock Options and Company RSUs set forth opposite such Stockholder’s name (all such directly or indirectly owned Company Shares and Company
Stock Options that are outstanding as of the date hereof, together with any Company Shares and Company Stock Options that are hereafter issued to or otherwise directly or indirectly acquired or beneficially owned by any Stockholder prior to the
termination of this Agreement, including pursuant to any exercise of Company Stock Options or any settlement of Company RSUs, acquisition by purchase, or stock dividend, distribution, split-up, recapitalization, combination or similar transaction
(including any Company Shares and Company Stock Options acquired or otherwise beneficially owned by such Stockholder after the date hereof including Company Shares acquired upon the exercise of Company Stock Options or the settlement of Company RSUs
after the date hereof (collectively “After-Acquired Shares”), collectively, the “Subject Shares”)); 

WHEREAS, as a condition to their willingness to enter into the Agreement and Plan of Merger (the “Merger Agreement”) dated as
of the date hereof among Parent, Purchaser and the Company, Parent and Purchaser have required that each Stockholder, and in order to induce Parent and Purchaser to enter into the Merger Agreement each Stockholder has agreed to, enter into this
Agreement; and 
 WHEREAS, capitalized terms used but not otherwise defined herein shall have the respective meanings ascribed to such terms
in the Merger Agreement, and the other definitional and interpretative provisions set forth in Sections 1.1 and 10.9 of the Merger Agreement shall apply hereto as if such provisions were set forth herein. 

NOW, THEREFORE, in consideration of the foregoing and the respective representations, warranties, covenants and agreements set forth below and
for good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto, intending to be legally bound, do hereby agree as follows: 

ARTICLE I 
 AGREEMENT TO TENDER
AND VOTE 
 Section 1.1 Agreement to Tender. Subject to the terms of this Agreement, each Stockholder agrees to tender or
cause to be tendered in the Offer all of such Stockholder’s Subject Shares (other than Company Stock Options that are not exercised or Company RSUs that 

 
do not settle during the term of this Agreement) pursuant to and in accordance with the terms of the Offer, free and clear of all Encumbrances, except for Permitted Encumbrances (as defined
below). Without limiting the generality of the foregoing, as promptly as practicable after, but in no event later than ten (10) business days (as defined in Rule 14d-1(g)(3) of the Exchange Act) after, the commencement (within the meaning
of Rule 14d–2 under the Exchange Act) of the Offer (or in the case of any After-Acquired Shares directly or indirectly acquired subsequent to such tenth (10th) business day, no later
than five (5) business days after such acquisition), each Stockholder shall deliver pursuant to the terms of the Offer (a) a letter of transmittal with respect to all of such Stockholder’s Subject Shares complying with the terms of
the Offer, (b) a certificate representing all such Subject Shares that are certificated, or an “agent’s message” (or such other evidence, if any, of transfer as the Paying Agent may reasonably request) in the case of a
book–entry share of any uncertificated Subject Shares, and (c) all other documents or instruments required to be delivered by other stockholders of the Company pursuant to the terms of the Offer (it being understood that this sentence
shall not apply to Company Stock Options that are not exercised or Company RSUs that do not settle during the term of this Agreement). Each Stockholder agrees that, once any of such Stockholder’s Subject Shares are tendered, such Stockholder
will not withdraw such Subject Shares from the Offer, unless and until this Agreement shall have been validly terminated in accordance with Section 5.3. 

Section 1.2. Agreement to Vote. Subject to the terms of this Agreement, each Stockholder hereby irrevocably and
unconditionally agrees that, during the time this Agreement is in effect, at any annual or special meeting of the stockholders of the Company, however called, including any adjournment or postponement thereof, and in connection with any action
proposed to be taken by written consent of the stockholders of the Company, such Stockholder shall, in each case to the fullest extent that such Stockholder’s Subject Shares are entitled to vote thereon: (a) appear (in person or by proxy)
at each such meeting or otherwise cause all such Subject Shares to be counted as present thereat for purposes of determining a quorum; and (b) be present (in person or by proxy) and vote (or cause to be voted), or deliver (or cause to be
delivered) a written consent with respect to, all of its Subject Shares (i) against any action or agreement that would reasonably be expected to (A) result in a breach of any covenant, representation or warranty or any other obligation or
agreement of the Company contained in the Merger Agreement, or of any Stockholder contained in this Agreement, or (B) result in any of the conditions set forth in Article 8 or Annex A of the Merger Agreement not being satisfied in a timely
manner; (ii) against any change in the Company Board; (iii) against any Acquisition Proposal and against any other action, agreement or transaction involving the Company that is intended, or would reasonably be expected, to impede,
interfere with, delay, postpone, adversely affect or prevent the consummation of the Offer or the Merger or the other transactions contemplated by the Merger Agreement, including (x) any extraordinary corporate transaction, such as a merger,
consolidation or other business combination involving the Company (other than the Offer and the Merger); (y) a sale, lease, license or transfer of a material amount of assets (including, for the avoidance of doubt, Intellectual Property Rights)
of the Company or any reorganization, recapitalization or liquidation of the Company, or (z) any change in the present capitalization of the Company or any amendment or other change to the Certificate of Incorporation or Company Bylaws, in each
case, to the extent not expressly permitted by the Merger Agreement; and (iv) in favor of any other matter necessary for consummation of the transactions contemplated by the Merger Agreement, which is considered at any such meeting of
stockholders, and in connection therewith to execute any documents reasonably requested by 

  
 2 

 
Parent which are necessary or appropriate in order to effectuate the foregoing. Subject to the proxy granted under Section 1.3 below, each Stockholder shall retain at all times the right to
vote the Subject Shares in such Stockholder’s sole discretion, and without any other limitation, on any matters other than those set forth in this Section 1.2 that are at any time or from time to time presented for consideration to the
Company’s stockholders generally. 
 Section 1.3 Irrevocable Proxy. In order to secure the performance of such
Stockholder’s obligations under this Agreement, by entering into this Agreement, such Stockholder hereby irrevocably grants a proxy appointing each executive officer of Purchaser as such Stockholder’s attorney-in-fact and proxy, with full
power of substitution and resubstitution, for and in its name, to vote, express consent or dissent, or otherwise to utilize such voting power to the full extent of such Stockholders’ voting rights with respect to all such Stockholders’
Subject Shares (which proxy is irrevocable and which appointment is coupled with an interest, including for purposes of Section 212 of the DGCL) to vote, and to execute written consents with respect to, all such Stockholders’ Subject
Shares solely on the matters described in Section 1.2. Such Stockholder hereby further affirms that such irrevocable proxy is given to secure the performance of the duties of such Stockholder under this Agreement and that such irrevocable proxy
is coupled with an interest and may under no circumstances be revoked. Such Stockholder hereby ratifies and confirms all that such irrevocable proxy may lawfully do or cause to be done pursuant to the terms hereof. Such irrevocable proxy is executed
and intended to be irrevocable in accordance with the provisions of Section 212 of the DGCL. Notwithstanding the foregoing, the proxy granted by such Stockholder pursuant to this Section 1.3 shall automatically terminate, without any
notice or other action by any person, upon termination of this Agreement in accordance with its terms. Such Stockholder hereby revokes any and all previous proxies granted with respect to its Subject Shares. If any Stockholder is the beneficial
owner, but not the record owner, of any of the Subject Shares, such Stockholder shall cause the record owner thereof to execute and grant an irrevocable proxy conforming to the above provisions of this Section 1.3. Each Stockholder agrees to
execute any further agreement or form reasonably necessary or appropriate to confirm and effectuate the grant of the proxy contained herein. Such proxy shall automatically terminate upon the valid termination of this Agreement in accordance with its
terms. Parent may terminate this proxy with respect to a Stockholder at any time at its sole election by written notice provided to such Stockholder. 

Section 1.4 Return of Subject Shares. If the Offer is terminated or withdrawn, or the Merger Agreement is terminated
prior to the purchase of the Subject Shares in the Offer or if this Agreement is otherwise terminated in accordance with the terms hereof, Parent and Purchaser shall promptly return, and shall cause any depositary acting on behalf of Parent and
Purchaser to return, all Subject Shares (and any other Shares) tendered by any Stockholder in the Offer to such Stockholder. 

  
 3 

 ARTICLE II 

REPRESENTATIONS AND WARRANTIES OF THE STOCKHOLDERS 

Each Stockholder, on its own account with respect to the Subject Shares, represents and warrants to Parent and Purchaser as to itself,
severally and not jointly, that: 
 Section 2.1 Organization; Authorization; Binding Agreement. If such Stockholder is
not a natural person, such Stockholder is an entity duly organized, validly existing and in good standing under the laws of its jurisdiction of organization, and the execution, delivery and performance by such Stockholder of this Agreement and the
consummation of the transactions contemplated hereby are within such Stockholder’s corporate or organizational powers and have been duly authorized by all necessary corporate or organizational actions on the part of such Stockholder. If such
Stockholder is a natural person, the execution, delivery and performance by such Stockholder of this Agreement and the consummation of the transactions contemplated hereby are within his or her legal capacity and requisite powers, and if this
Agreement is being executed in a representative or fiduciary capacity, the person signing this Agreement has full power and authority to execute, deliver and perform this Agreement. This Agreement has been duly and validly executed and delivered by
such Stockholder and constitutes a valid and binding agreement of such Stockholder enforceable against such Stockholder in accordance with its terms, except (i) as such enforceability may be limited by bankruptcy, insolvency, reorganization,
moratorium and other similar applicable Law, now or hereafter in effect, affecting creditors’ rights generally and (ii) the remedy of specific performance and injunctive and other forms of equitable relief may be subject to equitable
defenses and to the discretion of the court before which any proceeding therefor may be brought. If such Stockholder is married, and any of the Subject Shares of such Stockholder constitute community property or otherwise need spousal or other
approval for this Agreement to be legal, valid and binding, this Agreement has been duly executed and delivered by such Stockholder’s spouse and, assuming the due authorization, execution and delivery hereof by Parent and Purchaser, is
enforceable against such Stockholder’s spouse in accordance with its terms, subject to the effects of bankruptcy, insolvency, reorganization, moratorium and other similar applicable Law, now or hereafter in effect, affecting creditors’
rights generally and the remedy of specific performance and injunctive and other forms of equitable relief may be subject to equitable defenses and to the discretion of the court before which any proceeding therefor may be brought. 

Section 2.2 Non-Contravention. The execution, delivery and performance by such Stockholder of this Agreement and the
consummation of the transactions contemplated hereby do not and will not (i) if such Stockholder is not a natural person, violate, contravene or conflict with or result in any breach of any provision of any certificate of incorporation, bylaws
or other organizational documents of such Stockholder, (ii) violate any applicable Law applicable to such Stockholder, (iii) require any consent, approval, authorization or permit of, or other action by any person under, constitute a
default under, or give rise to any right of termination, cancellation, modification or acceleration, or any event that, with the giving of notice, the passage of time or otherwise, would constitute a default or give rise to any such right, or to a
loss of any benefit to which such Stockholder is entitled under any of the terms, conditions or provisions of any note, license, agreement, contract, indenture or other instrument or obligation to which such Stockholder or any of its Subject Shares
is bound, (iv) result (or, with the giving of notice, the 

  
 4 

 
passage of time or otherwise, would result) in the creation or imposition of any Lien on any asset of such Stockholder (other than one created by Parent or Purchaser or otherwise pursuant to this
Agreement) or (v) violate any order, writ, injunction, decree, statute, rule or regulation applicable to such Stockholder or by which any of its assets are bound, in the cases of (iii) or (iv) above, that could reasonably be expected
to prevent or materially delay or impair the consummation by such Stockholder of the transactions contemplated by this Agreement or otherwise materially impair such Stockholder’s ability to perform its obligations hereunder. No governmental
licenses, authorizations, permits, consents or approvals are required in connection with the execution and delivery of this Agreement by such Stockholder or the consummation by such Stockholder of the transactions contemplated hereby, except for
applicable requirements, if any, under the Exchange Act and any other applicable U.S. state or federal securities laws. 

Section 2.3 Absence of Litigation. As of the date hereof, there is no Action pending against, or, to the knowledge of such
Stockholder, threatened against or otherwise affecting, such Stockholder or any of its properties or assets (including such Stockholder’s Subject Shares) that could reasonably be expected to prevent or materially delay or impair the
consummation by such Stockholder of the transactions contemplated by this Agreement or otherwise materially impair such Stockholder’s ability to perform its obligations hereunder. 

Section 2.4 Ownership of Subject Shares; Total Shares. Such Stockholder is the record and / or beneficial owner (as defined
in Rule 13d-3 of the Exchange Act) of all of its Subject Shares and, as of the date of Purchaser’s acceptance of the Subject Shares in the Offer, such Stockholder will have good, valid and marketable title to all of the Subject Shares, in each
case, free and clear of any Liens, claims, proxies, voting trusts or agreements, options, rights, understandings or arrangements inconsistent with this Agreement or the transactions contemplated hereby, or any other material encumbrances,
limitations or restrictions whatsoever on title, transfer or exercise of any rights of a stockholder in respect of such Subject Shares (including any restrictions on the right to vote or otherwise transfer such Subject Shares) (collectively,
“Encumbrances”), except for any such Encumbrance that may be imposed pursuant to (i) this Agreement and (ii) any applicable restrictions on transfer under the Securities Act or any state securities laws (collectively,
“Permitted Encumbrances”). As of the date hereof, such Stockholder does not own, beneficially or otherwise, any Company Securities other than as set forth opposite such Stockholder’s name in Annex I. 

Section 2.5 Voting Power. Such Stockholder has full voting power, with respect to all such Stockholder’s Subject
Shares, and full power of disposition, full power to issue instructions with respect to the matters set forth herein, and full power to agree to all of the matters set forth in this Agreement, in each case with respect to all of such
Stockholder’s Subject Shares. None of such Stockholder’s Subject Shares are subject to any stockholders’ agreement, proxy, voting trust or other agreement or arrangement with respect to the voting of such Subject Shares, except as
provided hereunder. 
 Section 2.6 Finder’s Fees. Except as provided in the Merger Agreement, no investment banker,
broker, finder or other intermediary is entitled to a fee or commission from the Company or any Company Subsidiary in connection with the transactions contemplated by the Merger Agreement or this Agreement based solely upon any arrangement or
agreement made by or on behalf of such Stockholder. 

  
 5 

 Section 2.7 Reliance by Parent. Such Stockholder understands and acknowledges
that Parent and Purchaser are entering into the Merger Agreement in reliance upon such Stockholder’s execution and delivery and performance of this Agreement. 

ARTICLE III 
 REPRESENTATIONS AND
WARRANTIES OF PARENT AND PURCHASER 
 Each of Parent and Purchaser hereby, jointly and severally, represents and warrants to the
Stockholders as follows: 
 Section 3.1 Organization; Authorization; Binding Agreement. Each of Parent and Purchaser is a
corporation duly organized, validly existing and in good standing under the laws of the State of Delaware, and the execution, delivery and performance by Parent and Purchaser of this Agreement and the consummation of the transactions contemplated
hereby are within Parent’s and Purchaser’s corporate powers and have been duly authorized by all necessary corporate actions on the part of Parent and Purchaser. This Agreement has been duly and validly executed and delivered by such
Stockholder and constitutes a valid and binding agreement of Parent and Purchaser enforceable against Parent and Purchaser in accordance with its terms, except (i) as such enforceability may be limited by bankruptcy, insolvency, reorganization,
moratorium and other similar applicable Law, now or hereafter in effect, affecting creditors’ rights generally and (ii) the remedy of specific performance and injunctive and other forms of equitable relief may be subject to equitable
defenses and to the discretion of the court before which any proceeding therefor may be brought. 
 ARTICLE IV 

OTHER COVENANTS OF THE STOCKHOLDERS 

Subject to Section 1.3, each Stockholder hereby covenants and agrees as to itself, severally and not jointly, that: 

Section 4.1 No Transfers; No Inconsistent Arrangements. 

(a) Except as provided hereunder or under the Merger Agreement, such Stockholder shall not, directly or indirectly, (i) transfer, sell, assign, gift,
pledge, hedge, hypothecate or otherwise dispose (including, for the avoidance of doubt, by depositing, submitting or otherwise tendering any such Subject Shares into any tender or exchange offer) of or entering into of any derivative instrument with
respect to such Subject Shares (collectively, “Transfer”), or consent to or permit any such Transfer of, any or all of its Subject Shares, or any interest therein, (ii) create, agree to create or voluntarily permit to exist any
Encumbrance, other than any Permitted Encumbrances, on any such Subject Shares, (iii) enter into any Contract with respect to any transfer of such Subject Shares or any interest therein, (iv) grant or permit the grant of any proxy, power
of attorney or other authorization or consent in or with respect to such Subject Shares, (v) deposit or permit the deposit of such Subject Shares into a voting trust or enter into a voting agreement or arrangement with respect to such Subject
Shares or (vi) take, agree to take or voluntarily permit any other action that would in any way restrict, limit or interfere with the performance of its 

  
 6 

 
obligations under this Agreement or the transactions contemplated hereby or otherwise make any representation or warranty of each Stockholder herein untrue or incorrect. Notwithstanding the
foregoing, such Stockholder may make transfers of Subject Shares by will or by operation of law, in which case the Subject Shares shall continue to be bound by this Agreement and provided that each transferee agrees in writing to be bound by the
terms and conditions of this Agreement. If any involuntary transfer of any of such Stockholder’s Subject Shares in the Company shall occur (including, but not limited to, a sale by such Stockholder’s trustee in any bankruptcy, or a sale to
a purchaser at any creditor’s or court sale), the transferee (which term, as used herein, shall include any and all transferees and subsequent transferees of the initial transferee) shall take and hold such Subject Shares subject to all of the
restrictions, liabilities and rights under this Agreement, which shall continue in full force and effect until valid termination of this Agreement. 

(b) Any attempted transfer of Subject Shares, or any interest therein, in violation of this Section 4.1 shall be null and void. In
furtherance of this Agreement, such Stockholder shall and hereby does authorize the Company to notify the Company’s transfer agent that there is a stop transfer restriction with respect to all of its Subject Shares (and that this Agreement
places limits on the voting and transfer of its Subject Shares) pursuant to the terms of this Agreement; provided, that any such stop transfer restriction shall terminate automatically, without any notice or other action by any person, upon
the termination of this Agreement in accordance with Section 5.3 and, upon such event, Parent and the Company shall promptly notify the Company’s transfer agent of such termination. 

Section 4.2 No Exercise of Appraisal Rights. Such Stockholder forever waives and agrees not to exercise any appraisal
rights or dissenters’ rights in respect of its Subject Shares which may arise with respect to the Merger. 
 Section 4.3
Legends. If so requested by Parent, such Stockholder agrees that its Subject Shares shall bear a legend stating that they are subject to this Agreement; provided, that the Company shall remove such legend upon the Termination Date.

 Section 4.4 Documentation and Information. Such Stockholder (i) subject to reasonable prior written notice to
such Stockholder, consents to and authorizes the publication and disclosure by Parent and Purchaser of its identity and holding of Subject Shares, the nature of its commitments and obligations under this Agreement (including, for the avoidance of
doubt, the disclosure of this Agreement) and any other information, in each case, that Parent reasonably determines is required to be disclosed by applicable Law in any press release, the Offer Documents, or any other disclosure document in
connection with the Offer, the Merger and any transactions contemplated by the Merger Agreement, and such Stockholder acknowledges that Parent and Purchaser may, in parent’s sole discretion, file this Agreement or a form hereof with the SEC or
any other Governmental Authority or securities exchange and (ii) agrees promptly to give to Parent any information it may reasonably require for the preparation of any such disclosure documents. Such Stockholder agrees to promptly update any
written information supplied by it specifically for use in any such disclosure document, if and to the extent that any such information shall have become false or misleading in any material respect. 

  
 7 

 Section 4.5 Public Statement. Such Stockholder shall not issue any press
release or make any other public statement with respect to this Agreement, the Offer, the Merger Agreement or any transactions contemplated thereby without the prior consent of Parent and the Company, except (i) as may be required by applicable
Law, (ii) in connection with any action or proceeding arising out of or relating to this Agreement covered by Section 5.7, or (iii) to communicate with its investors in quarterly or annual letters provided such communications are
subject to standard confidentiality obligations. 
 Section 4.6. Waiver of Certain Actions. Each Stockholder hereby
agrees not to commence or participate in, and to take all actions necessary to opt out of any class in any class action with respect to, any claim, derivative or otherwise, against Parent, Purchaser or any of their respective successors
(a) challenging the validity of, or seeking to enjoin or delay the operation of, any provision of this Agreement or the Merger Agreement (including any claim seeking to enjoin or delay the consummation of the Offer or the Merger Closing) or
(b) alleging a breach of any duty of the Company Board in connection with the Merger Agreement, this Agreement or the transactions contemplated thereby or hereby. 

Section 4.7. No Solicitation. Subject to Section 5.13, each Stockholder shall not, and shall cause its Affiliates and
its and their respective directors, officers and employees not to, and shall direct and use its reasonable best efforts to cause its and its Affiliates’ respective other Representatives not to, directly or indirectly, (i) solicit,
initiate, knowingly facilitate or knowingly encourage any inquiries, proposals or offers that constitute or could reasonably be expected to lead to any Acquisition Proposal, (ii) provide any non–public information concerning the Company to
any Person or group who has made or could reasonably be expected to make any Acquisition Proposal, or engage in any discussions or negotiations with respect to any Acquisition Proposal, (iii) otherwise cooperate with or assist or participate
in, or facilitate, any such inquiries, proposals, offers, discussions or negotiations, or (iv) resolve or agree to do any of the foregoing. Each Stockholder shall, and shall cause its Affiliates and its and their respective directors, officers
and employees to, and shall direct and use its reasonable best efforts to cause its and its Affiliates’ respective other Representatives to, immediately cease and cause to be terminated any solicitation, encouragement, discussion or negotiation
with any Person or groups that may be ongoing with respect to any Acquisition Proposal or potential Acquisition Proposal. 

Section 4.8 Adjustments. In the event of any stock split, stock dividend, merger, reorganization, recapitalization,
reclassification, combination, exchange of shares or the like of the capital stock of the Company affecting the Subject Shares, the terms of this Agreement shall apply to the resulting securities. 

  
 8 

 ARTICLE V 

MISCELLANEOUS 

Section 5.1 Notices. All notices, requests and other communications to any party hereunder shall be in writing (including
e-mail or facsimile transmission) and shall be given, 
 if to Parent or Purchaser: 

Microsemi Corporation 
 One
Enterprise 
 Aliso Viejo, CA 92656 

Attention: Chief Executive Officer 

with a copy (which shall not constitute notice) to: 

O’Melveny & Myers LLP 

2765 Sand Hill Road 
 Menlo Park,
CA 94025 
 Facsimile No: (650) 473-2601 

Email: wlazarow@omm.com 

Attention: Warren Lazarow, Esq. 

if to any Stockholder, to it at that address specified on Annex I, with copies to the persons identified therein, 

with a copy (which shall not constitute notice) to the Company: 

Vitesse Semiconductor Corporation 

4721 Calle Carga 
 Camarillo,
California 93012 
 Facsimile No. (805)-910-3781 

E-mail: mcdermut@vitesse.com 

Attention: Martin S. McDermut 

with a copy (which shall not constitute notice) to: 
  

			
	Stubbs Alderton & Markiles, LLP
	15260 Ventura Boulevard, 20th Floor
	Sherman Oaks, California 91403
	Facsimile:		(818) 444-4520
	E-mail:		jmcilvery@stubbsalderton.com
			jfriedman@stubbsalderton.com
	Attention:		John McIlvery
			Jonathan Friedman

  
 9 

 or to such other physical address, e-mail address or facsimile number as such party may hereafter specify for the
purpose by notice to each other party hereto. All such notices, requests and other communications shall be deemed received on the date of receipt by the recipient thereof if received prior to 5:00 p.m. on a business day in the place of receipt.
Otherwise, any such notice, request or communication shall be deemed to have been received on the next succeeding business day. 

Section 5.2 Further Assurances. Each Stockholder shall, from time to time, execute and deliver, or cause to be executed and
delivered, such additional or further transfers, assignments, endorsements and other instruments as Parent or Purchaser may reasonably request to carry out the transactions expressly set forth in this Agreement. Parent and Purchaser shall, from time
to time, execute and deliver, or cause to be executed and delivered, such additional or further consents and other instruments as any other party may reasonably request to carry out the transactions contemplated by this Agreement. 

Section 5.3 Termination. This Agreement shall terminate automatically, without any notice or other action by any person,
upon the earlier of (i) the termination of the Merger Agreement in accordance with its terms, (ii) the Effective Time, (iii) the date the Offer shall have terminated or the Expiration Date shall have occurred, in each case without
acceptance for payment of the Subject Shares pursuant to the Offer, (iv) the date of any material modification, waiver or amendment to any provision of the Merger Agreement that reduces the amount, changes the form or otherwise adversely
affects the consideration payable to the Stockholder pursuant to the Merger Agreement as in effect on the date hereof, and (v) the mutual written consent of Parent, Purchaser and Stockholders holding a majority of the Subject Shares. The date
of any termination of this Agreement in accordance with this Section 5.3 shall be referred to herein as the “Termination Date.” Upon termination of this Agreement, no party shall have any further obligations or liabilities
under this Agreement and the power of attorney and proxy set forth in Section 1.3 shall be revoked, terminated and of no further force and effect; provided, however, that (x) nothing set forth in this
Section 5.3 shall relieve any party from liability for any breach of this Agreement prior to termination hereof and (y) the provisions of this Article V shall survive any termination of this Agreement. 

Section 5.4 Amendments and Waivers. 

(a) Any provision of this Agreement may be amended or waived if such amendment or waiver is in writing and is signed, in the case of an
amendment, by each party to this Agreement or, in the case of a waiver, by each party against whom the waiver is to be effective. 
 (b) No
failure or delay by any party in exercising any right, power or privilege hereunder shall operate as a waiver thereof nor shall any single or partial exercise thereof preclude any other or further exercise thereof or the exercise of any other right,
power or privilege. The rights and remedies herein provided shall be cumulative and not exclusive of any rights or remedies provided by applicable Law. 

Section 5.5 Expenses. Except as otherwise provided herein, all costs and expenses incurred in connection with this
Agreement shall be paid by the party incurring such cost or expense, whether or not the Offer or the Merger is consummated. 

  
 10 

 Section 5.6 Binding Effect; Benefit; Assignment. 

(a) The provisions of this Agreement shall be binding upon and shall inure to the benefit of the parties hereto and their respective
successors and assigns. No provision of this Agreement is intended to confer any rights, benefits, remedies, obligations or liabilities hereunder upon any person other than the parties hereto and their respective successors and assigns. 

(b) No party may assign, delegate or otherwise transfer any of its rights or obligations under this Agreement without the consent of each
other party hereto, except that each of Parent and Purchaser may transfer or assign its rights and obligations under this Agreement, in whole or from time to time in part, to one or more direct or indirect wholly owned subsidiaries of Parent at any
time; provided, that such transfer or assignment shall not relieve Parent or Purchaser of any of its obligations hereunder. 

Section 5.7 Governing Law. This Agreement shall be governed and construed in accordance with the laws of the State
of Delaware without regard to any applicable conflicts of law. All actions and proceedings arising out of or relating to this Agreement shall be heard and determined in the Delaware Court of Chancery, or if no such state court has proper
jurisdiction, then the Federal courts located in the State of Delaware (collectively, the “Delaware Courts”). The parties hereto hereby (a) submit to the exclusive jurisdiction of the Delaware Courts for the purpose of any
Action arising out of or relating to this Agreement brought by any party hereto, and (b) irrevocably waive, and agree not to assert by way of motion, defense, or otherwise, in any such Action, any claim that it is not subject personally to the
jurisdiction of the above-named courts, that its property is exempt or immune from attachment or execution, that the Action is brought in an inconvenient forum, that the venue of the Action is improper, or that this Agreement or the Transactions may
not be enforced in or by any of the above-named courts. 
 Section 5.8 Waiver of Jury Trial. EACH OF THE PARTIES
HERETO HEREBY WAIVES TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW ANY RIGHT IT MAY HAVE TO A TRIAL BY JURY WITH RESPECT TO ANY LITIGATION DIRECTLY OR INDIRECTLY ARISING OUT OF, UNDER OR IN CONNECTION WITH THIS AGREEMENT OR THE TRANSACTIONS
CONTEMPLATED BY THIS AGREEMENT. Each of the parties hereto (a) certifies that no representative, agent or attorney of any other party has represented, expressly or otherwise, that such other party would not, in the event of litigation, seek to
enforce that foregoing waiver and (b) acknowledges that it and the other hereto have been induced to enter into this Agreement and the Transactions, as applicable, by, among other things, the mutual waivers and certifications in this
Section 5.8. 
 Section 5.9 Counterparts. This Agreement may be executed and delivered (including by facsimile or
other form of electronic transmission) in one or more counterparts, and by the different parties hereto in separate counterparts, each of which when executed shall be deemed to be an original but all of which taken together shall constitute one and
the same agreement. 
 Section 5.10 Entire Agreement. This Agreement, together with Annex I and the other
documents and certificates delivered pursuant hereto, constitutes the entire agreement between the parties with respect to the subject matter of this Agreement and supersedes all prior 

  
 11 

 
agreements and understandings, both oral and written, between the parties with respect to its subject matter. 

Section 5.11 Severability. If any term or other provision of this Agreement is invalid, illegal or incapable of being
enforced by any rule of law, or public policy, all other conditions and provisions of this Agreement shall nevertheless remain in full force and effect so long as the economic or legal substance of the Transactions is not affected in any manner
materially adverse to any party. Upon such determination that any term or other provision is invalid, illegal or incapable of being enforced, the parties hereto shall negotiate in good faith to modify this Agreement so as to effect the original
intent of the parties as closely as possible in a mutually acceptable manner in order that the Transactions be consummated as originally contemplated to the fullest extent possible. 

Section 5.12 Specific Performance. The parties hereto agree that each of Parent and Purchaser would be irreparably damaged
if for any reason any Stockholder fails to perform any of the provisions of this Agreement in accordance with their specific terms or otherwise, and that each of Parent and Purchaser would not have an adequate remedy at law for money damages in such
event. Accordingly, it is agreed that each of Parent and Purchaser shall be entitled to specific performance and injunctive and other equitable relief to prevent breaches of this Agreement and to enforce specifically the performance of the terms and
provisions of this Agreement in any Delaware Court, in addition to any other remedy to which they are entitled at law or in equity. Any and all remedies herein expressly conferred upon Parent and Purchaser will be deemed cumulative with and not
exclusive of any other remedy conferred hereby, or by Law or equity upon Parent or Purchaser, and the exercise by Parent or Purchaser of any one remedy will not preclude the exercise of any other remedy. 

Section 5.13 Stockholder Capacity. Each Stockholder signs this Agreement solely in such Stockholder’s capacity as a
Stockholder of the Company, and not in such Stockholder’s capacity as a director, officer or employee of the Company. Notwithstanding any provision of this Agreement to the contrary, nothing in this Agreement shall (or shall require any
Stockholder to attempt to) limit, restrict or otherwise affect any Stockholder who is a director or officer of the Company or any of the Company Subsidiaries from acting in such capacity (it being understood that this Agreement shall apply to each
Stockholder solely in each Stockholder’s capacity as a holder of the Subject Shares) or from fulfilling the obligations and responsibilities of such office (including the performance of obligations required by the fiduciary obligations and
responsibilities under applicable Law of such Stockholder acting solely in his or her capacity as a director or officer). 
 [The
remainder of this page is intentionally blank.] 

  
 12 

 IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly executed by their respective
authorized officers as of the day and year first above written. 
  

					
	MICROSEMI CORPORATION
		
	By:		 /s/ James J. Peterson

			Name:		James J. Peterson
			Title:		Chairman of the Board and
					Chief Executive Officer
	
	LLIU100 ACQUISITION CORP.
		
	By:		 /s/ Steven G. Litchfield

			Name:		Steven G. Litchfield
			Title:		President, Chief Executive Officer

 [Signature Page to Support Agreement] 

 IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly executed by their respective
authorized officers as of the day and year first above written. 
  

					
	STOCKHOLDER
	
	RAGING CAPITAL MASTER FUND, LTD.
		
	By:		Raging Capital Management, LLC
			Investment Manager
		
	By:		 /s/ William C. Martin

			Name:		William C. Martin
			Title:		Chairman

  

	
	STOCKHOLDER
	
	 /s/ Matthew B. Frey

	Name: Matthew B. Frey
	
	STOCKHOLDER
	
	 /s/ Christopher R. Gardner

	Name: Christopher R. Gardner
	
	STOCKHOLDER
	
	 /s/ Steven P. Hanson

	Name: Steven P. Hanson

 [Signature Page to Support Agreement] 

 
	
	STOCKHOLDER
	
	 /s/ James H. Hugar

	Name: James H. Hugar
	
	STOCKHOLDER
	
	 /s/ Scot B. Jarvis

	Name: Scot B. Jarvis
	
	STOCKHOLDER
	
	 /s/ William C. Martin

	Name: William C. Martin
	
	STOCKHOLDER
	
	 /s/ Edward Rogas, Jr.

	Name: Edward Rogas, Jr.
	
	STOCKHOLDER
	
	 /s/ Kenneth H. Traub

	Name: Kenneth H. Traub

 [Signature Page to Support Agreement] 

 ANNEX I 
  

					
	Stockholder / Address*	  	Subject Shares	 
		
	 Raging Capital Master Fund, Ltd.**
	  	 	14,321,127	  
	 Matthew B. Frey
	  	 	42,875	  
	 Christopher R. Gardner
	  	 	1,534,174	  
	 Steven P. Hanson
	  	 	110,670	  
	 James H. Hugar
	  	 	124,206	  
	 Scot B. Jarvis
	  	 	126,283	  
	 William C. Martin
	  	 	—  	  
	 Edward Rogas, Jr.
	  	 	124,856	  
	 Kenneth H. Traub
	  	 	133,075	  

  

	*	Unless otherwise noted, the address of each stockholder is 4721 Calle Carga, Camarillo, California 93012. 

	**	C/O Raging Capital Management, LLC, Ten Princeton Avenue, PO Box 228, Rocky Hill, NJ 08553-0228.

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