Document:

Second Supplemental Indenture to the Senior Subordinated Notes Indenture

 EXHIBIT 4.2 
 SECOND SUPPLEMENTAL INDENTURE 
 Second Supplemental Indenture (this “Supplemental
Indenture”), dated as of June 20, 2008, among SigmaTel, Inc. (the “Guaranteeing Subsidiary”), a subsidiary of Freescale Semiconductor, Inc. (as successor by merger to Freescale Acquisition Corporation under the Indenture
(as defined below)), a Delaware corporation (the “Issuer”), and The Bank of New York, as trustee (the “Trustee”). 
 W I T N E S S E T H 
 WHEREAS, each of the Issuer and the Guarantors (as
defined in the Indenture) have heretofore executed and delivered to the Trustee a Senior Subordinated Notes Indenture, as previously supplemented by a first supplemental indenture thereto (the “Indenture”), each dated as of
December 1, 2006, providing for the issuance of an unlimited aggregate principal amount of 10 1/8% Senior Subordinated Notes
due 2016 (the “Notes”); 
 WHEREAS, the Indenture provides that under certain circumstances the Guaranteeing
Subsidiary shall execute and deliver to the Trustee a supplemental indenture pursuant to which the Guaranteeing Subsidiary shall unconditionally guarantee all of the Issuer’s Obligations under the Notes and the Indenture on the terms and
conditions set forth herein and under the Indenture (the “Guarantee”); and 
 WHEREAS, pursuant to Section 9.01 of the
Indenture, the Trustee is authorized to execute and deliver this Supplemental Indenture. 
 NOW THEREFORE, in consideration of the foregoing
and for other good and valuable consideration, the receipt of which is hereby acknowledged, the parties mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows: 
 (1) Capitalized Terms. Capitalized terms used herein without definition shall have the meanings assigned to them in the Indenture. 
 (2) Agreement to Guarantee. The Guaranteeing Subsidiary hereby agrees as follows: 
 (a) Along with all other Guarantors named in the Indenture (including pursuant to any supplemental indentures), to jointly and severally unconditionally
guarantee to each Holder of a Note authenticated and delivered by the Trustee and to the Trustee and its successors and assigns, irrespective of the validity and enforceability of the Indenture, the Notes or the obligations of the Issuer hereunder
or thereunder, that: 
 (i) the principal of and interest and premium, if any, on the Notes shall be promptly paid in full
when due, whether at maturity, by acceleration, redemption or otherwise, and interest on the overdue principal of and interest on the Notes, if any, if lawful, and all other obligations of the Issuer to the Holders or the Trustee thereunder shall be
promptly paid in full or performed, all in accordance with the terms thereof; and 
  

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 (ii) in case of any extension of time of payment or renewal of any Notes or any of such
other obligations, that same shall be promptly paid in full when due or performed in accordance with the terms of the extension or renewal, whether at stated maturity, by acceleration or otherwise. Failing payment when due of any amount so
guaranteed or any performance so guaranteed for whatever reason, the Guarantors and the Guaranteeing Subsidiary shall be jointly and severally obligated to pay the same immediately. This is a guarantee of payment and not a guarantee of collection.

 (b) The obligations hereunder shall be unconditional, irrespective of the validity, regularity or enforceability of the Notes or the
Indenture, the absence of any action to enforce the same, any waiver or consent by any Holder of the Notes with respect to any provisions hereof or thereof, the recovery of any judgment against the Issuer, any action to enforce the same or any other
circumstance which might otherwise constitute a legal or equitable discharge or defense of a guarantor. 
 (c) The Guaranteeing Subsidiary
hereby waives: diligence, presentment, demand of payment, filing of claims with a court in the event of insolvency or bankruptcy of the Issuer, any right to require a proceeding first against the Issuer, protest, notice and all demands whatsoever.

 (d) This Guarantee shall not be discharged except by complete performance of the obligations contained in the Notes, the Indenture and
this Supplemental Indenture. The Guaranteeing Subsidiary accepts all obligations applicable to a Guarantor under the Indenture, including Articles XI and XII of the Indenture (which are deemed incorporated in this Supplemental Indenture and
applicable to this Guarantee) and, as applicable, Section 14.18 of the Indenture. The Guaranteeing Subsidiary acknowledges that by executing this Supplemental Indenture, it will become a Subsidiary Guarantor under the Indenture and subject to
all the terms and conditions applicable to Subsidiary Guarantors contained therein. 
 (e) If any Holder or the Trustee is required by any
court or otherwise to return to the Issuer, the Guarantors (including the Guaranteeing Subsidiary), or any custodian, trustee, liquidator or other similar official acting in relation to either the Issuer or the Guarantors, any amount paid either to
the Trustee or such Holder, this Guarantee, to the extent theretofore discharged, shall be reinstated in full force and effect. 
 (f) The
Guaranteeing Subsidiary shall not be entitled to any right of subrogation in relation to the Holders in respect of any obligations guaranteed hereby until payment in full of all obligations guaranteed hereby. 
 (g) As between the Guaranteeing Subsidiary, on the one hand, and the Holders and the Trustee, on the other hand, (x) the maturity of the obligations
guaranteed hereby may be accelerated as provided in Article 6 of the Indenture for the purposes of this Guarantee, notwithstanding any stay, injunction or other prohibition preventing such acceleration in respect of the obligations guaranteed
hereby, and (y) in the event of any declaration of acceleration of such obligations as provided in Article 6 of the Indenture, such obligations (whether or not due and payable) shall forthwith become due and payable by the Guaranteeing
Subsidiary for the purpose of this Guarantee. 
  

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 (h) The Guaranteeing Subsidiary shall have the right to seek contribution from any non-paying Guarantor
so long as the exercise of such right does not impair the rights of the Holders under this Guarantee. 
 (i) Pursuant to Section 11.02
of the Indenture, after giving effect to all other contingent and fixed liabilities that are relevant under any applicable Bankruptcy or fraudulent conveyance laws, and after giving effect to any collections from, rights to receive contribution from
or payments made by or on behalf of any other Guarantor in respect of the obligations of such other Guarantor under Article 11 of the Indenture, this new Guarantee shall be limited to the maximum amount permissible such that the obligations of such
Guaranteeing Subsidiary under this Guarantee will not constitute a fraudulent transfer or conveyance. 
 (j) This Guarantee shall remain in
full force and effect and continue to be effective should any petition be filed by or against the Issuer for liquidation, reorganization, should the Issuer become insolvent or make an assignment for the benefit of creditors or should a receiver or
trustee be appointed for all or any significant part of the Issuer’s assets, and shall, to the fullest extent permitted by law, continue to be effective or be reinstated, as the case may be, if at any time payment and performance of the Notes
are, pursuant to applicable law, rescinded or reduced in amount, or must otherwise be restored or returned by any obligee on the Notes and Guarantee, whether as a “voidable preference”, “fraudulent transfer” or otherwise, all as
though such payment or performance had not been made. In the event that any payment or any part thereof, is rescinded, reduced, restored or returned, the Note shall, to the fullest extent permitted by law, be reinstated and deemed reduced only by
such amount paid and not so rescinded, reduced, restored or returned. 
 (k) In case any provision of this Guarantee shall be invalid,
illegal or unenforceable, the validity, legality, and enforceability of the remaining provisions shall not in any way be affected or impaired thereby. 
 (l) The obligations of the Guaranteeing Subsidiary under this Guarantee are subordinated in right of payment, to the extent and in the manner provided in Article XII of the Indenture to the prior payment in full of
all existing and future Senior Indebtedness of the Guaranteeing Subsidiary. 
 (m) Each payment to be made by the Guaranteeing Subsidiary in
respect of this Guarantee shall be made without set-off, counterclaim, reduction or diminution of any kind or nature. 
 (3) Execution and
Delivery. The Guaranteeing Subsidiary agrees that the Guarantee shall remain in full force and effect notwithstanding the absence of the endorsement of any notation of such Guarantee on the Notes. 
 (4) Merger, Consolidation or Sale of All or Substantially All Assets. 
 (a) Except as otherwise provided in Section 5.01(c) of the Indenture, the Guaranteeing Subsidiary may not consolidate or merge with or into or wind
up into (whether or not the Issuer or Guaranteeing Subsidiary is the surviving corporation), or sell, assign, transfer, 

  

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lease, convey or otherwise dispose of all or substantially all of its properties or assets, in one or more related transactions, to any Person unless:

 (i)(A) the Guaranteeing Subsidiary is the surviving corporation or the Person formed by or surviving any such consolidation
or merger (if other than the Guaranteeing Subsidiary) or to which such sale, assignment, transfer, lease, conveyance or other disposition will have been made is a corporation organized or existing under the laws of the jurisdiction of organization
of the Guaranteeing Subsidiary, as the case may be, or the laws of the United States, any state thereof, the District of Columbia, or any territory thereof (the Guaranteeing Subsidiary or such Person, as the case may be, being herein called the
“Successor Person”); 
     (B) the Successor Person, if other than the Guaranteeing
Subsidiary, expressly assumes all the obligations of the Guaranteeing Subsidiary under the Indenture and the Guaranteeing Subsidiary’s related Guarantee pursuant to supplemental indentures or other documents or instruments in form reasonably
satisfactory to the Trustee; 
     (C) immediately after such transaction, no Default exists; and

     (D) the Issuer shall have delivered to the Trustee an Officer’s Certificate and an Opinion of
Counsel, each stating that such consolidation, merger or transfer and such supplemental indentures, if any, comply with the Indenture; or 
 (ii) the transaction is made in compliance with Section 4.10 of the Indenture; 
 (b) Subject to certain
limitations described in the Indenture, the Successor Person will succeed to, and be substituted for, the Guaranteeing Subsidiary under the Indenture and the Guaranteeing Subsidiary’s Guarantee. Notwithstanding the foregoing, the Guaranteeing
Subsidiary may merge into or transfer all or part of its properties and assets to another Guarantor or the Issuer. 
 (5) Releases.

 The Guarantee of the Guaranteeing Subsidiary shall be automatically and unconditionally released and discharged, and no further action by
the Guaranteeing Subsidiary, the Issuer or the Trustee is required for the release of the Guaranteeing Subsidiary’s Guarantee, upon: 
 (a)(i) any sale, exchange or transfer (by merger or otherwise) of the Capital Stock of the Guaranteeing Subsidiary (including any sale, exchange or transfer), after which the Guaranteeing Subsidiary is no longer a
Restricted Subsidiary or all or substantially all the assets of the Guaranteeing Subsidiary which sale, exchange or transfer is made in compliance with the applicable provisions of the Indenture; 
  

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 (ii) the release or discharge of the guarantee by the Guaranteeing Subsidiary of the
Senior Credit Facilities or the guarantee which resulted in the creation of the Guarantee, except a discharge or release by or as a result of payment under such guarantee; 
 (iii) the proper designation of the Guaranteeing Subsidiary as an Unrestricted Subsidiary; or 
 (iv) the Issuer exercising its Legal Defeasance option or Covenant Defeasance option in accordance with Article 8 of the Indenture or the
Issuer’s obligations under the Indenture being discharged in accordance with the terms of the Indenture; and 
 (b) the Guaranteeing
Subsidiary delivering to the Trustee an Officer’s Certificate and an Opinion of Counsel, each stating that all conditions precedent provided for in the Indenture relating to such transaction have been complied with. 
 (6) No Recourse Against Others. No director, officer, employee, incorporator or stockholder of the Guaranteeing Subsidiary shall have any
liability for any obligations of the Issuer or the Guarantors (including the Guaranteeing Subsidiary) under the Notes, any Guarantees, the Indenture or this Supplemental Indenture or for any claim based on, in respect of, or by reason of, such
obligations or their creation. Each Holder by accepting Notes waives and releases all such liability. The waiver and release are part of the consideration for issuance of the Notes. 
 (7) Governing Law. THIS SUPPLEMENTAL INDENTURE WILL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK. 

(8) Counterparts. The parties may sign any number of copies of this Supplemental Indenture. Each signed copy shall be an original, but all of
them together represent the same agreement. 
 (9) Effect of Headings. The Section headings herein are for convenience only and shall
not affect the construction hereof. 
 (10) The Trustee. The Trustee shall not be responsible in any manner whatsoever for or in
respect of the validity or sufficiency of this Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by the Guaranteeing Subsidiary. 
 (11) Subrogation. The Guaranteeing Subsidiary shall be subrogated to all rights of Holders of Notes against the Issuer in respect of any amounts
paid by the Guaranteeing Subsidiary pursuant to the provisions of Section 2 hereof and Section 11.01 of the Indenture; provided that, if an Event of Default has occurred and is continuing, the Guaranteeing Subsidiary shall not be
entitled to enforce or receive any payments arising out of, or based upon, such right 

  

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of subrogation until all amounts then due and payable by the Issuer under the Indenture or the Notes shall have been paid in full. 
 (12) Benefits Acknowledged. The Guaranteeing Subsidiary’s Guarantee is subject to the terms and conditions set forth in the Indenture. The
Guaranteeing Subsidiary acknowledges that it will receive direct and indirect benefits from the financing arrangements contemplated by the Indenture and this Supplemental Indenture and that the guarantee and waivers made by it pursuant to this
Guarantee are knowingly made in contemplation of such benefits. 
 (13) Successors. All agreements of the Guaranteeing Subsidiary in
this Supplemental Indenture shall bind its Successors, except as otherwise provided in Section 2(k) hereof or elsewhere in this Supplemental Indenture. All agreements of the Trustee in this Supplemental Indenture shall bind its successors.

  

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 IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly executed, all
as of the date first above written. 
  

			
	SIGMATEL, INC.
		
	By:	 	/s/ Daryl Raiford
	Name: Title:	 	 Daryl Raiford
 Chief Executive Officer, President
& Chief Financial Officer

  

			
	 THE BANK OF NEW YORK,
 as
Trustee

		
	By:	 	/s/ Beata Hryniewicka
	 Name:
 Title:
	 	 Beata Hryniewicka
 Assistant Vice
President

  

 7Form of Supplement to the Intellectual Property Security Agreement

 Supplement No. ___ to the 
 Intellectual Property 
 Security Agreement 
 EXHIBIT 10.1 
 SUPPLEMENT NO. ___ (this “Supplement”) DATED AS
OF _________, 200__, TO THE INTELLECTUAL PROPERTY SECURITY AGREEMENT DATED AS OF DECEMBER 1, 2006, AMONG FREESCALE ACQUISITION HOLDINGS CORP. (n/k/a Freescale Semiconductor Holdings V, Inc.) (“Holdings”), FREESCALE
SEMICONDUCTOR, INC. (the “Borrower”), the Subsidiaries of FREESCALE HOLDINGS (BERMUDA) III, LTD. (“Parent”) from time to time party thereto and CITIBANK, N.A., as Collateral Agent. 
 A. Reference is made to the Credit Agreement dated as of December 1, 2006 (as amended, supplemented or otherwise modified from time to time, the
“Credit Agreement”), among the Borrower, Holdings, Parent, CITIBANK, N.A., as Administrative Agent, Swing Line Lender and an L/C Issuer, and each lender from time to time party thereto (collectively, the “Lenders”
and individually, a “Lender”). 
 B. Capitalized terms used herein and not otherwise defined herein shall have the meanings
assigned to such terms in the Credit Agreement and the Intellectual Property Security Agreement referred to therein. 
 C. The Grantors have
entered into the Intellectual Property Security Agreement in order to induce the Lenders to make Loans and the L/C Issuers to issue Letters of Credit. Section 2.04(e) of the Intellectual Property Security Agreement provides that each Grantor
must sign and deliver a supplemental Intellectual Property Security Agreement with respect to all applicable Intellectual Property owned by it as of the last day of the previous quarter to the extent that such Intellectual Property is not covered by
any previous Intellectual Property Security Agreement. 
 Accordingly, the parties agree as follows: 
 SECTION 1. 
 (a) As security for the payment
or performance, as the case may be, in full of the Obligations including the Guarantees, and in accordance with Section 2.04(e) of the Intellectual Property Security Agreement, each Grantor signing below by its signature below assigns and
pledges to the Collateral Agent, its successors and assigns, for the benefit of the Secured Parties, and hereby grants to the Collateral Agent, its successors and assigns, for the benefit of the Secured Parties, a security interest (the
“Security Interest”) in all right, title or interest in or to any and all of the following assets and properties now owned or at any time hereafter acquired by such Grantor or in which such Grantor now has or at any time in the
future may acquire any right, title or interest (collectively, the “Collateral”): 
 (i)(x) all copyright
rights in any work subject to the copyright laws of the United States or any other country, whether as author, assignee, transferee or otherwise, and (y) all registrations and applications for registration of any such copyright in the United
States or any other country, including registrations, recordings, supplemental registrations and pending applications for registration in the United States Copyright Office, including those listed on Schedule I hereto; 

 (ii)(x) all letters patent of the United States or the equivalent thereof in any other
country, all registrations and recordings thereof, and all applications for letters patent of the United States or the equivalent thereof in any other country, including registrations, recordings and pending applications in the United States Patent
and Trademark Office or any similar offices in any other country, including those listed on Schedule I hereto, and (y) all reissues, continuations, divisions, continuations-in-part, renewals or extensions thereof, and the inventions
disclosed or claimed therein, including the right to make, use and/or sell the inventions disclosed or claimed therein; 
 (iii)(x) all trademarks, service marks, trade names, corporate names, company names, business names, fictitious business names, trade styles, trade dress, logos, other source or business identifiers, designs and general intangibles of
like nature, now existing or hereafter adopted or acquired, all registrations and recordings thereof, and all registration and recording applications filed in connection therewith, including registrations and registration applications in the United
States Patent and Trademark Office or any similar offices in any State of the United States or any other country or any political subdivision thereof, and all extensions or renewals thereof, including those listed on Schedule I hereto,
(y) all goodwill connected with the use of and symbolized thereby, and (z) all other assets, rights and interests that uniquely reflect or embody such goodwill; 
 (iv) all Patent Licenses, Trademark Licenses, Copyright Licenses or other Intellectual Property licenses or sublicense agreements to which
any Grantor is a party; 
 (v) all other Intellectual Property; and 
 (vi) all Proceeds and products of any and all of the foregoing and all collateral security and guarantees given by any Person with respect
to any of the foregoing; 
 provided, however, that notwithstanding any of the other provisions herein (and notwithstanding any
recording of the Collateral Agent’s Lien made in the U.S. Patent and Trademark Office, U.S. Copyright Office, or other IP registry office), this Agreement shall not constitute a grant of a security interest in any property to the extent that
such grant of a security interest is prohibited by any rule of law, statute or regulation or is prohibited by, or constitutes a breach or default under or results in the termination of any contract, license, agreement, instrument or other document
evidencing or giving rise to such property, or would result in the forfeiture of the Grantor’s rights in the property including, without limitation: any Trademark applications filed in the United States Patent and Trademark Office on the basis
of such Grantor’s “intent-to-use” such trademark, unless and until acceptable evidence of use of the Trademark has been filed with the United States Patent and Trademark Office pursuant to Section 1(c) or Section 1(d) of the
Lanham Act (15 U.S.C. 1051, et seq.), to the extent that granting a lien in such Trademark application prior to such filing would adversely affect the enforceability or validity of such Trademark application. 
  

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 (c) Each Grantor signing below hereby irrevocably authorizes the Collateral Agent for the benefit of the
Secured Parties at any time and from time to time to file in any relevant jurisdiction any initial financing statements with respect to the Collateral or any part thereof and amendments thereto that contain the information required by Article 9 of
the Uniform Commercial Code or the analogous legislation of each applicable jurisdiction for the filing of any financing statement or amendment, including whether such Grantor is an organization, the type of organization and any organizational
identification number issued to such Grantor. Each Grantor agrees to provide such information to the Collateral Agent promptly upon request. The Collateral Agent is further authorized to file with the United States Patent and Trademark Office or
United States Copyright Office (or any successor office or any similar office in any other country) such documents as may be necessary or advisable for the purpose of perfecting, confirming, continuing, enforcing or protecting the Security Interest
granted by each Grantor, without the signature of any Grantor, and naming any Grantor or the Grantors as debtors and the Collateral Agent as secured party. 
 (d) The Security Interest is granted as security only and shall not subject the Collateral Agent or any other Secured Party to, or in any way alter or modify, any obligation or liability of any Grantor with respect to
or arising out of the Collateral. 
 SECTION 2. Each Grantor represents and warrants to the Collateral Agent and the other Secured Parties
that this Supplement has been duly authorized, executed and delivered by it and constitutes its legal, valid and binding obligation, enforceable against it in accordance with its terms. 
 SECTION 3. This Supplement may be executed in counterparts (and by different parties hereto on different counterparts), each of which shall constitute an
original, but all of which when taken together shall constitute a single contract. This Supplement shall become effective when the Collateral Agent shall have received a counterpart of this Supplement that bears the signature of each Grantor signing
below. Delivery of an executed signature page to this Supplement by facsimile transmission or other electronic communication shall be as effective as delivery of a manually signed counterpart of this Supplement. 
 SECTION 4. Each Grantor signing below hereby represents and warrants that set forth on Schedule I attached hereto is a true and correct schedule in all
material respects of any and all Patent, Trademark and Copyright registrations and applications not covered by any previous Intellectual Property Security Agreement or supplement thereto so signed and delivered by it. 
 SECTION 5. Except as expressly supplemented hereby, the Intellectual Property Security Agreement shall remain in full force and effect. 
 SECTION 6. THIS SUPPLEMENT SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK. 
 SECTION 7. In case any one or more of the provisions contained in this Supplement should be held invalid, illegal or unenforceable in any respect, the
validity, legality and enforceability of the remaining provisions contained herein and in the Intellectual Property 

  

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Security Agreement shall not in any way be affected or impaired thereby (it being understood that the invalidity of a particular provision in a particular
jurisdiction shall not in and of itself affect the validity of such provision in any other jurisdiction). The parties hereto shall endeavor in good-faith negotiations to replace the invalid, illegal or unenforceable provisions with valid provisions
the economic effect of which comes as close as possible to that of the invalid, illegal or unenforceable provisions. 
 SECTION 8. All
communications and notices hereunder shall be in writing and given as provided in Section 5.01 of the Intellectual Property Security Agreement. 
 SECTION 9. The parties hereto agree that the Collateral Agent shall be entitled to reimbursement for its reasonable out-of-pocket expenses in connection with this Supplement in accordance with Section 10.04 of
the Credit Agreement. 
 IN WITNESS WHEREOF, each Grantor signing below has duly executed this Supplement to the Intellectual Property Security Agreement as
of the day and year first above written. 
  

			
	 FREESCALE SEMICONDUCTOR, INC.,

		
	By:	 	 
		 	 Name:
 Title:

  

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 Schedule I to 
 Supplement No. ___ to 
 the Intellectual Property 
 Security Agreement 
 INTELLECTUAL PROPERTY 
  
 PATENT APPLICATIONS 
  
 PATENTS ISSUED 
  
  

 Schedule I - 1

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