Document:

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                                                                   EXHIBIT 10(N)

                                VOTING AGREEMENT

     In consideration of Texas Instruments Incorporated, a Delaware corporation
("Parent"), Burma Acquisition Corp., a Delaware corporation ("Subsidiary"), and
Burr-Brown Corporation, a Delaware corporation (the "Company"), entering into on
the date hereof a Merger Agreement, dated as of the date hereof (the "Merger
Agreement"), pursuant to which Merger Sub, upon the terms and subject to the
conditions thereof, will merge with and into the Company (the "Merger"), and
each outstanding share of Company Common Stock will be converted into the right
to receive the Merger Consideration (as defined in the Merger Agreement) in
accordance with the terms of the Merger Agreement, each of the undersigned
holders (each, a "Stockholder") of shares of Company Common Stock agrees with
each of Parent, Merger Sub and the Company as follows:

     1. During the period (the "Agreement Period") beginning on the date hereof
and ending on the earlier of (i) the Effective Time (as defined in the Merger
Agreement), and (ii) the date of termination of the Merger Agreement in
accordance with its terms, each Stockholder hereby agrees to vote the shares of
Company Common Stock set forth opposite its name in SCHEDULE A hereto (the
"Schedule A Securities") to approve and adopt the Merger Agreement and the
Merger (provided that the Stockholder shall not be required to vote in favor of
the Merger Agreement or the Merger if the Merger Agreement has, without the
consent of the Stockholder, been amended in any manner that is material and
adverse to such Stockholder) and any actions directly and reasonably related
thereto at any meeting or meetings of the stockholders of the Company, and at
any adjournment thereof or pursuant to action by written consent, at or by which
such Merger Agreement, or such other actions, are submitted for the
consideration and vote of the stockholders of the Company so long as such
meeting is held (including any adjournment thereof) or written consent adopted
prior to the termination of the Agreement Period.

     2. During the Agreement Period, each Stockholder hereby agrees that such
Stockholder shall not enter into any voting agreement or grant a proxy or power
of attorney with respect to the Schedule A Securities in any manner inconsistent
with the obligations of such Stockholder under this Agreement.

     3. Each Stockholder hereby represents and warrants to Parent and Merger Sub
that as of the date hereof:

          (a) Such Stockholder (i) owns beneficially all of the shares of
     Company Common Stock set forth opposite the Stockholder's name in SCHEDULE
     A hereto, (ii) has the full and unrestricted legal power, authority and
     right to enter into, execute and deliver this Voting Agreement without the
     consent or approval of any other person, and (iii) has not entered into any
     voting agreement or other similar agreement with or granted any person any
     proxy (revocable or irrevocable) in respect of such shares (other than this
     Voting Agreement).

          (b) This Voting Agreement is the valid and binding agreement of such
     Stockholder.

          (c) No investment banker, broker or finder is entitled to a commission
     or fee from such Stockholder or the Company in respect of this Voting
     Agreement based upon any arrangement or agreement made by or on behalf of
     the Stockholder.

     4. If any provision of this Voting Agreement shall be invalid or
unenforceable under applicable law, such provision shall be ineffective to the
extent of such invalidity or unenforceability only, without in any way affecting
the remaining provisions of this Voting Agreement.

     5. This Voting Agreement may be executed in two or more counterparts each
of which shall be an original with the same effect as if the signatures hereto
and thereto were upon the same instrument.

     6. The parties hereto agree that if, for any reason, any party hereto shall
have failed to perform its obligations under this Voting Agreement, then the
party seeking to enforce this Voting Agreement against such non-performing party
shall be entitled to specific performance and injunctive and other equitable

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relief, and the parties hereto further agree to waive any requirement for the
securing or posting of any bond in connection with the obtaining of any such
injunctive relief. This provision is without prejudice to any other rights or
remedies, whether at law or in equity, that any party hereto may have against
any other party hereto for any failure to perform its obligations under this
Voting Agreement.

     7. This Voting Agreement shall be governed by and construed in accordance
with the laws of the State of Delaware.

     8. Each Stockholder will, upon request, execute and deliver any additional
documents deemed by Parent to be reasonably necessary or desirable to complete
and effectuate the covenants contained herein.

     9. This Agreement shall terminate upon the termination of the Agreement
Period.

     10. No Stockholder shall sell, assign, encumber or otherwise dispose of, or
enter into any contract, option or other arrangement or understanding in respect
of the direct or indirect sale, assignment, transfer, encumbrance or other
disposition of, any Schedule A Securities during the term of this Agreement
unless such Stockholder first provides written notice thereof to Parent and
obtains a written agreement of the proposed transferee to be bound by the terms
of this Agreement.

     11. Parent, Merger Sub and the Company understand and agree that this
Agreement pertains only to each Stockholder and not to any of its affiliates, if
any, or advisers.

     12. Parent, Merger Sub and the Company severally, but not jointly,
represent and warrant to each Stockholder that there is no agreement,
understanding or commitment, written or oral, to pay any consideration directly
or indirectly in connection with the Merger or otherwise to or for the benefit
of any holder of Company Common Stock or options thereon other than as set forth
in the Merger Agreement (except, in the case of directors, employees, agents,
customers, suppliers or contractors of the Company who are also holders, such
consideration as is payable by the Company in the ordinary course of business,
and except for amounts payable to officers, directors or employees in connection
with or pursuant to any options or option, stock purchase, stock ownership or
other employee benefit plans or agreements).

     13. Neither Parent, Merger Sub nor the Company will enter into any
agreement with any other stockholder of the Company having a purpose or effect
substantially similar to that of this Voting Agreement on financial terms (in
respect of such other stockholder) more favorable than the terms of this Voting
Agreement.

     14. Any Stockholder who is also a director or officer of the Company will
not, by execution of this Agreement, be precluded from exercising his fiduciary
duties under applicable Law in his capacity as a director or officer with
respect to the Company and nothing herein will limit or affect, or give rise to
any liability to a Stockholder by virtue of any actions taken by such
Stockholder in his or her capacity as a director or officer of the Company.

     15. Nothing contained in this Voting Agreement shall be deemed to vest in
Parent, Merger Sub or the Company any direct or indirect ownership or incidence
of ownership of or with respect to any Schedule A Securities. All rights,
ownership and economic benefits of and relating to the Schedule A Securities
shall remain and belong to the applicable Stockholder and neither Parent, Merger
Sub nor the Company shall have any power or authority to direct any Stockholder
in the voting of any Schedule A Securities or the performance by any Stockholder
of its duties or responsibilities as a stockholder of the Company, except as
otherwise provided herein.

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     IN WITNESS WHEREOF, the parties hereto have executed this Voting Agreement
as of June 21, 2000.

                                            TEXAS INSTRUMENTS INCORPORATED

                                            By:     /s/ M. SAMUEL SELF
                                              ----------------------------------
                                                Name: M. Samuel Self
                                                Title: Senior Vice President and
                                                Controller

                                            BURMA ACQUISITION CORP.

                                            By:     /s/ M. SAMUEL SELF
                                              ----------------------------------
                                                Name: M. Samuel Self
                                                Title: Treasurer

                                            BURR-BROWN CORPORATION

                                            By:     /s/ SYRUS P. MADAVI
                                              ----------------------------------
                                                Name: Syrus P. Madavi
                                                Title: Chairman, President and
                                                CEO

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                                            STOCKHOLDERS:

                                            /s/ THOMAS R. BROWN, JR.
                                            ------------------------------------
                                            Thomas R. Brown, Jr.*

                                            /s/ SYRUS P. MADAVI
                                            ------------------------------------
                                            Syrus P. Madavi

                                            /s/ FRANCIS J. AGUILAR
                                            ------------------------------------
                                            Francis J. Aguilar

                                            /s/ JOHN S. ANDEREGG, JR.
                                            ------------------------------------
                                            John S. Anderegg, Jr.

                                            /s/ MARCELO A. GUMUCIO
                                            ------------------------------------
                                            Marcelo A. Gumucio

                                            /s/ KENNETH G. WOLF
                                            ------------------------------------
                                            Kenneth G. Wolf

                                            /s/ J. SCOTT BLOUIN
                                            ------------------------------------
                                            J. Scott Blouin

     * Individually and (i) as trustee of Trust Agreement dated October 3, 1998,
under the last will and testament of Helen M. Brown for the benefit of Mary B.
Brown, (ii) as trustee of Trust Agreement dated October 3, 1998, under the last
will and testament of Helen M. Brown for the benefit of Sarah M. Brown
Smallhouse and (iii) as general partner of Brown Investment Management Limited
Partnership.

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                                   SCHEDULE A
                                       TO
                                VOTING AGREEMENT

<TABLE>
<CAPTION>
STOCKHOLDER                                                   CLASS    NUMBER OF SHARES
-----------                                                   -----    ----------------
<S>                                                           <C>      <C>
Thomas R. Brown, Jr.*.......................................  Common      16,527,631
John S. Anderegg, Jr. ......................................  Common         167,397
Francis J. Aguilar..........................................  Common          50,625
Syrus P. Madavi.............................................  Common          40,000
Kenneth G. Wolf.............................................  Common           1,875
Marcelo A. Gumucio..........................................  Common               0
J. Scott Blouin.............................................  Common               0
</TABLE>

     * Individually and (i) as trustee of Trust Agreement dated October 3, 1998,
under the last will and testament of Helen M. Brown for the benefit of Mary B.
Brown, (ii) as trustee of Trust Agreement dated October 3, 1998, under the last
will and testament of Helen M. Brown for the benefit of Sarah M. Brown
Smallhouse and (iii) as general partner of Brown Investment Management Limited
Partnership.

                                       B-5<PAGE>   1

                                                                  EXHIBIT 4.19.1

              AMENDMENT NO. 1 TO SECURITIES EXCHANGE AGREEMENT AND
          RELATED REGISTRATION RIGHTS AGREEMENT OF ABLE TELCOM HOLDING
                                      CORP.
                       [RGC INTERNATIONAL INVESTORS, LDC]

         This Amendment No. 1 ("Amendment No. 1") dated as of July 7, 2000 to
the Securities Exchange Agreement dated as of February 4, 2000 ("Exchange
Agreement"), by and between RGC International Investors, LDC ("Holder") and Able
Telcom Holding Corp. (the "Company"), and an amendment to a related Registration
Rights Agreement entered into by the Holder and the Company pursuant to the
Exchange Agreement as specifically described herein.

                                    RECITALS

         WHEREAS, in June 1998 the Company issued, pursuant to a Purchase
Agreement (the "Series B Purchase Agreement") to the Holder, 2000 shares of
Series B Preferred Stock, and in connection therewith, the Holder and the
Company entered into a Registration Rights Agreement substantially in the form
of Exhibit A hereto (the "Series B Registration Rights Agreement"), the Articles
of Amendment substantially in the form of Exhibit B hereto (the "Series B
Articles of Amendment") and other documents related to the issuance of Series B
Preferred Stock and included as exhibits to the Company's public filings with
the Securities and Exchange Commission (the "Series B Agreements" and
collectively with the Series B Registration Rights Agreement and the Series B
Articles of Amendment, the "Series B Documents"); and

         WHEREAS, in February 2000 the Holder and the Company entered into the
Exchange Agreement, a copy of which is attached as Exhibit C and incorporated by
reference herein, whereby, in exchange for the surrender to the Company by the
Holder of 375 Preferred Shares (constituting all the Company's Series B
Preferred Shares then still held by the Holder), the Company issued 500,000
shares of Company Common Stock, $0.001 par value per share (the "Common Stock"),
plus $5,031,978 in cash, and the registration rights and warrants described in
the next succeeding paragraphs; and

         WHEREAS, the Company and the Holder, as of February 4, 2000, entered
into a Registration Rights Agreement ("Exchange Registration Rights Agreement")
substantially in the form of Exhibit D attached hereto and incorporated by
reference herein, to provide for the registration of the shares of Common Stock
issued to the Holder pursuant to the Exchange Agreement and the shares
underlying the Warrants issued pursuant to the Exchange Agreement; and

         WHEREAS, the Company issued to the Holder warrants for 100,000 shares
of Common Stock, referred to as the "Warrants", a form of the Warrant being
substantially in the form as Exhibit F hereto which form shall be incorporated
by reference herein; and

         WHEREAS, the Company and the Holder are entering into this Amendment
No. 1 in connection with the Company's settlement of its obligation to Sirit
Technologies, Inc. ("Sirit"), as

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described in the Settlement Agreement between the Sirit Parties and the Able
Parties (as each of those terms are defined in the Sirit Settlement Agreement)
dated as of July 7, 2000 (the "Sirit Agreement"); and

         WHEREAS, the Holder and the Company wish in this Amendment No. 1 to
amend the Exchange Agreement and the Exchange Registration Rights Agreement, but
not the Warrant or the other Series B Documents (together, the "Transaction
Documents"); and

         WHEREAS, the Company will, as promptly as possible, call and hold a
shareholders meeting to consider and approve (1) an amendment to the Company's
Articles of Incorporation to increase the number of shares of authorized Common
Stock to 100,000,000 shares of Common Stock; (2) one or more proposals to issue
the shares of Common Stock pursuant to this Amendment No. 1 and pursuant to
certain other agreements between the Holder and the Company; (to the extent
shareholder approval of such issuance is required) and (3) a proposal to issue
shares of Common Stock pursuant to the Sirit Agreement (matters (1), (2) and (3)
together, the "Shareholder Proposals").

         NOW, THEREFORE, intending to be legally bound hereby, the Parties agree
that all capitalized terms not defined herein shall have the meanings ascribed
to them in the Exchange Agreement and as follows:

1.       Recitals. The above recitals are true, correct and incorporated herein
by reference.

2.       Amendment to Exchange Registration Rights Agreement to Revise
Definition of Registration Deadline.

         The term "Registration Deadline" in Section 1 of the Exchange
Registration Agreement shall be amended and restated in its entirety to read as
follows:

                           "Registration Deadline" shall mean the date
                  the Company, using its Best Efforts, is able to
                  secure the effectiveness of the Registration
                  Statement (defined herein); provided, however, that
                  in no event shall the Registration Deadline be later
                  than November 30, 2000."

3.       Agreement with Respect to Bankruptcy.

         The Holder agrees not to place Able in involuntary bankruptcy from the
date of this Agreement until either (a) if the Sirit Shares are issued prior to
December 1, 2000, 91 days following the issuance of the Sirit Shares; or (b) if
the Sirit Shares are not issued by December 1, 2000, for 91 days following the
date on which the Consent Judgment has been paid or satisfied in full (but in no
event later than May 31, 2001).

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4.       Proxy.

         The Holder shall execute a form of proxy attached to this Amendment No.
1 as Exhibit "F" whereby the Holder agrees to vote any shares of Common Stock
held by the Holder in support of the Shareholder Proposals.

5.       Condition to Effectiveness of Amendment No. 1.

         This Amendment No. 1 shall not be effective until all of the conditions
contained in Section XI (other than Condition XI.B. which is covered by this
Amendment No. 1) of the Sirit Agreement have been satisfied in full (unless
waived by the Investors).

         The Company shall inform the Holder in writing upon the satisfaction of
such conditions. The Holder may waive satisfaction of such conditions at any
time.

6.       Miscellaneous.

         a.       Entire Understanding. This Amendment No. 1, together with the
Transaction Documents, contains the entire understanding of the parties with
respect to the matters covered hereby. Except as set forth in this Amendment No.
1, the terms of the Transaction Documents shall remain in full force and effect.

         b.       Further Actions. The Company and the Holder acknowledge that
this Amendment No. 1 is being entered into in connection with the Company's
settlement of its obligation to Sirit arising out of certain litigation with the
Sirit. The Company and the Holder agree that they shall take such further
actions as may be required to effect the intent and purpose of this Amendment
No. 1, including the filing of amended Articles of Amendment and the execution
of any further amendments to any of the Transaction Documents, as may be
reasonably requested by the Company or any Investor, to carry out the purpose
and intention of this Agreement.

         c.       Governing Law. This Amendment No. 1 shall be governed by and
construed and enforced in accordance with the laws of the State of New York
applicable to agreements executed and to be performed entirely within such state
and, where applicable, federal law.

         d.       Counterpart Signatures. This Amendment No. 1 may be executed
in two or more counterparts, all of which shall be considered one and the same
amendment, it being understood that all parties need not sign the same
counterpart.

         e.       Construction. The language in this Amendment No. 1 will be
deemed to be the language chosen by the parties to express their mutual intent,
and no rules of strict construction shall be applied against any party.

         f.       Conflict with other Documents. To the extent that the
provisions of any of the Transaction Documents conflict with this Amendment No.
1, the terms of this Amendment No. 1 shall govern provided that, the parties
acknowledge and agree that if any references to section or paragraph number are
not accurately reflected in this Amendment No. 1, then this Amendment No.

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1 shall be amended to reflect such changes without any further actions on the
part of any of the parties.

                          [SIGNATURES ON THE NEXT PAGE]

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IN WITNESS WHEREOF, the Parties hereto have caused this Amendment No. 1 to be
executed as of the day and year first above written.

                                       HOLDER:

                                       RGC INTERNATIONAL INVESTORS, LDC
                                       By:    Rose Glen Capital Management, L.P.
                                              Investment Manager

                                       By:    RGC General Partner Corp.
                                              As General Partner

                                       By:
                                              ---------------------------------
                                       Name:
                                              ---------------------------------
                                       Title:
                                              ---------------------------------

                                       ABLE TELCOM HOLDING CORP.

                                       By:
                                              ---------------------------------
                                       Name:
                                              ---------------------------------
                                       Title:
                                              ---------------------------------

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<PAGE>   6

                                   EXHIBIT "F"

                            ABLE TELCOM HOLDING CORP.
                                      PROXY

I appoint Michael Brenner and Edward Z. Pollock, or either one, the
undersigned's proxy to vote all of its shares of common stock of Able Telcom
Holding Corp. that are entitled to vote at any meeting of Able Telcom Holding
Corp. shareholders called to approve the Shareholder Proposals (as defined in
Amendment No. 1 to Securities Exchange Agreement and Related Registration Rights
Agreement of the Company and the undersigned dated as of July 7, 2000),
including the proposal to issue to Sirit Technologies shares of Common Stock
pursuant to the Settlement Agreement, dated as of July 7, 2000 (the "Sirit
Agreement"), between the "Sirit Parties" and the "Able Parties"; as each of
those terms is defined in the Sirit Agreement, a copy of which Sirit Agreement
is attached as Exhibit "A," in favor of the Shareholder Proposals. This proxy
shall expire and be of no further force and effect after December 1, 2000.

----------------, --------

(Complete above date and sign your name as it appears below. If more than one
name appears, each person should sign).

----------------------------------------

                                             By:
                                                 -------------------------------
                                             Name:
                                                   -----------------------------
                                             Its:
                                                  ------------------------------
                                             Number of shares of common stock
----------------------------------------

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