Exhibit 10.1

                     FIRST AMENDMENT TO CREDIT AGREEMENT


         FIRST AMENDMENT TO CREDIT AGREEMENT (this "Amendment"), dated as of 
November 18, 1997, among FSC SEMICONDUCTOR CORPORATION, a Delaware 
corporation ("Holdings"), FAIRCHILD SEMICONDUCTOR CORPORATION, a Delaware 
corporation (the "Borrower"), the lenders party to the Credit Agreement 
referred to below (the "Banks"), BANKERS TRUST COMPANY, as Administrative 
Agent (the "Administrative Agent"), CREDIT SUISSE FIRST BOSTON, as 
Syndication Agent (the "Syndication Agent"), and CANADIAN IMPERIAL BANK OF 
COMMERCE, as Documentation Agent (the "Documentation Agent", and together 
with the Administrative Agent and the Syndication Agent, the "Agents").  
Unless otherwise defined herein, all capitalized terms used herein and 
defined in the Credit Agreement are used herein as so defined.

                                W I T N E S S E T H :


         WHEREAS, Holdings, the Borrower, the Banks, the Administrative 
Agent, the Syndication Agent and the Documentation Agent are parties to a 
Credit Agreement, dated as of March 11, 1997 (as amended, modified or 
supplemented through the date hereof, the "Credit Agreement");

         WHEREAS, the Borrower desires to acquire substantially all of the 
assets (or 100% of the capital stock of a corporation or other entity to be 
formed to own and operate the business) of the Raytheon Semiconductor 
Division of the Raytheon Company, for a purchase price not to exceed 
$120,000,000, pursuant to an acquisition agreement (the "Acquisition 
Agreement") between the Borrower and the Raytheon Company which conforms in 
all material respects to the Exclusivity Agreement, dated October 27, 1997, 
summarizing the terms and conditions of the Acquisition Agreement (the 
"Summary of Terms"), attached hereto as Schedule I (collectively, the 
"Raytheon Acquisition");

         WHEREAS, in connection with the Raytheon Acquisition and in order to 
consummate same, the Banks have agreed to increase the Total Revolving Loan 
Commitment as set forth herein;

         WHEREAS, subject to the terms and conditions set forth herein, the 
Banks desire to (i) permit the Borrower to consummate the Raytheon 
Acquisition and (ii) amend the Credit Agreement as provided herein; and



         WHEREAS, subject to the terms and conditions set forth below, the 
parties hereto agree as follows;

         NOW, THEREFORE, it is agreed:

         1.   Notwithstanding anything to the contrary contained in Sections 
9.02, 9.05 and 9.14 of the Credit Agreement, the Banks hereby consent to the 
Borrower consummating the Raytheon Acquisition, so long as (i) any Liens or 
Indebtedness issued or assumed in connection with the Raytheon Acquisition 
are otherwise permitted under the Credit Agreement, (ii) promptly after (but 
in no event later than 30 days after) the consummation of the Raytheon 
Acquisition, 100% (or, in the case of a Foreign Subsidiary, excluding that 
portion of the voting stock of such Foreign Subsidiary which would be in 
excess of 65% of the total outstanding voting stock of such Foreign 
Subsidiary) of the capital stock of any Subsidiary acquired pursuant to the 
Raytheon Acquisition is pledged and delivered to the Collateral Agent for the 
benefit of the Secured Creditors pursuant the Pledge Agreement, (iii) within 
10 days after the Raytheon Acquisition, each newly acquired Domestic 
Wholly-Owned Subsidiary (x) executes and delivers a counterpart of the 
Subsidiaries Guaranty and (y) secures the Borrower's obligations pursuant to 
the Credit Agreement and the other Credit Documents (or such Subsidiary's 
obligations pursuant to a Subsidiaries Guaranty) by executing a counterpart 
of the Security Agreement and the Pledge Agreement and (iv) no Default or 
Event of Default then exists or would result therefrom.

         2.   Section 9.05(ii) is hereby amended by deleting the number 
"$5,000,000" appearing in the last line therein and inserting in lieu thereof 
the number "$75,000,000".

         3.   The Credit Agreement is hereby amended by inserting the 
following new Section 13.19:

         "13.19.  (a) The Borrower covenants and agrees that on and after the
    First Amendment Effective Date, it shall not be permitted to incur Loans
    or have Letters of Credit issued which would cause the sum of the then
    outstanding principal amount of Revolving Loans and Swingline Loans and
    Letter of Credit Outstandings to exceed $75,000,000 unless, in connection
    with any such Credit Event, the Borrower establishes to the satisfaction
    of the Administrative Agent (including by the delivery of a certificate
    of the Borrower's chief financial officer setting forth in reasonable
    detail the reasons therefor) that such incurrence of such 

                                         -2-


    Loans or issuance of such Letter of Credit would be permitted pursuant to
    the terms of the Senior Subordinated Note Indenture."

         4.   On and after the Increase Effective Date (as defined below), 
Schedule I to the Credit Agreement shall be hereby amended by deleting the 
column entitled "Revolving Loan Commitment" appearing therein and inserting 
in lieu thereof as a new column entitled "Revolving Loan Commitment" the 
information set forth on Schedule II attached hereto, which Schedule II 
reflects an increase in the Total Revolving Loan Commitment of $55,000,000. 
The Borrower and the Banks hereby agree to the $55,000,000 increase in the 
Total Revolving Loan Commitment.  Each Bank hereby acknowledges and agrees 
that from and after the Increase Effective Date its Revolving Loan Commitment 
shall be the amount set forth opposite such Bank's name on Schedule II 
attached hereto, as such amount may be adjusted from time to time in 
accordance with the terms of the Credit Agreement.  In connection with the 
increase in the Total Revolving Loan Commitment pursuant to this Section 4, 
the Borrower shall, in coordination with the Administrative Agent and the 
Banks, repay outstanding Revolving Loans of certain Banks and, if necessary, 
incur additional Revolving Loans from other Banks, in each case so that the 
Banks participate in each Borrowing of outstanding Revolving Loans pro rata 
on the basis of their Revolving Loan Commitments (after giving effect to this 
Amendment).  It is hereby agreed that any breakage or similar costs of the 
type described in Section 1.11 of the Credit Agreement incurred by the Banks 
in connection with any repayment or reborrowing of Revolving Loans 
contemplated by this Section 4 shall be for the account of the Borrower.

         5.   Each Credit Party hereby agrees that, (i) on or after the 
Increase Effective Date and upon the reasonable request of the Collateral 
Agent, such Credit Party will execute such amendments to the Mortgages as the 
Collateral Agent shall reasonably require in connection with the transactions 
contemplated by this Amendment and (ii) all Revolving Loans, Swingline Loans 
and Letters of Credit incurred pursuant to the additional Total Revolving 
Loan Commitment effected hereby shall also be entitled to the benefits of the 
Security Documents and the Guaranties.

         6.   The Borrower hereby covenants and agrees that, on the Increase 
Effective Date, the Borrower shall have executed and delivered to the 
Administrative Agent for the benefit of each Bank with a Revolving Loan 
Commitment and whose Revolving Loan Commitment is being increased pursuant to 
Section 4 of this Amendment (each such Bank, an "Increasing Bank") a new 
Revolving Note reflecting the increased Revolving Loan Commitment of such 
Bank, and the Increasing Banks shall surrender to the Borrower the Revolving 
Notes so replaced.

                                         -3-


         7.   In order to induce the Banks to enter into this Amendment, the 
Borrower hereby represents and warrants that (i) the representations, 
warranties and agreements contained in Section 7 of the Credit Agreement are 
true and correct in all material respects on and as of the First Amendment 
Effective Date (except with respect to any representations and warranties 
limited by their terms to a specific date, which shall be true and correct in 
all material respects as of such date), (ii) there exists no Default or Event 
of Default on the First Amendment Effective Date, in each case both before 
and after giving effect to this Amendment and (iii) neither the execution, 
delivery or performance by any credit Party of this Amendment, nor the 
consummation of the transactions contemplated hereby (including, the 
incurrence of the additional Total Revolving Loan Commitment as contemplated 
herein) violates or will violate any term, provision or condition of the 
Senior Subordinated Note Documents, and no consents or approvals shall be 
required to be obtained by Holdings or any of its Subsidiaries from the 
holders of the Senior Subordinated Notes in connection with the transactions 
contemplated herein.

         8.   This Amendment is limited as specified and shall not constitute 
a modification, acceptance or waiver of any other provision of the Credit 
Agreement or any other Credit Document.

         9.   This Amendment may be executed in any number of counterparts 
and by the different parties hereto on separate counterparts, each of which 
counterparts when executed and delivered shall be an original, but all of 
which shall together constitute one and the same instrument.  A complete set 
of counterparts shall be lodged with the Borrower and the Administrative 
Agent.

         10.  THIS AMENDMENT AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES 
HEREUNDER SHALL BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY THE LAW OF 
THE STATE OF NEW YORK.

         11.  This Amendment shall become effective on the date (the "First 
Amendment Effective Date") when Holdings, the Borrower, each Subsidiary 
Guarantor, the Required Banks and each Increasing Bank shall have signed a 
counterpart hereof (whether the same or different counterparts) and shall 
have delivered (including by way of facsimile) the same to the Administrative 
Agent at the Notice Office.

         12.  For the purposes of this Amendment, the Increase Effective Date 
shall mean the date on which all of the following conditions have been 
satisfied:

         (a)  The First Amendment Effective Date shall have occurred;

                                         -4-


         (b)  There shall have been delivered to the Administrative Agent and
    the Banks true and correct copies of the Acquisition Agreement, which
    shall conform in all material respects with the terms and conditions set
    forth in the Summary of Terms attached hereto as Schedule I with any
    material departures or waivers therefrom to be reasonably satisfactory to
    the Agents and the Required Banks; the Acquisition Agreement shall have
    been duly executed and delivered by the parties thereto and shall be in
    full force and effect; all conditions precedent to the consummation of
    the Raytheon Acquisition as set forth in the Acquisition Agreement shall
    have been satisfied, and not waived except with the consent (which will
    not be unreasonably withheld) of each Agent and the Required Banks, to
    the satisfaction of each Agent and the Required Banks; and the Raytheon
    Acquisition shall have been, or shall substantially contemporaneously
    (and in any event on the Increase Effective Date) be, consummated in
    accordance with the Acquisition Agreement and all applicable law
    (excluding immaterial violations of law which could not reasonably be
    expected to have, in the aggregate for all such violations, a material
    adverse effect on the consummation of the Raytheon Acquisition or on the
    operations, financial condition or prospects of Holdings and its
    Subsidiaries taken as a whole); 

         (c)  After giving effect to the Raytheon Acquisition, nothing shall
    have occurred (and neither the Banks nor the Agents shall have become
    aware of any facts or conditions not previously known) which the Agents
    or the Required Banks shall determine (i) has, or is reasonably likely to
    have, a material adverse effect on the rights or remedies of the Banks or
    the Agents, or on the ability of the Credit Parties to perform their
    obligations to them, or (ii) has, or is reasonably likely to have, a
    material adverse effect on the operations, financial condition or
    prospects of Holdings and its Subsidiaries taken as a whole;

         (d)  The Administrative Agent shall have received from Pierce
    Atwood, counsel to Holdings and its Subsidiaries, an opinion addressed to
    each of the Agents and each of the Banks, in form and substance
    satisfactory to the Agents, and covering such matters incident to this
    Amendment and the transactions contemplated herein (including the matters
    set forth in Section 13.19 of the Credit Agreement (as amended hereby) as
    the Agents may reasonably request; and 

         (e)  The Administrative Agent shall have received resolutions of the
    Board of Directors of each Credit Party, which resolutions shall be
    certified by the Secretary or any Assistant Secretary of such Credit
    Party and shall authorize the execution, delivery and performance by such
    Credit Party of this Amendment and the consummation of the transactions
    contemplated hereby, and the foregoing shall be reasonably acceptable to
    the Agents in their reasonable discretion;

                                         -5-


         13.  From and after the First Amendment Effective Date, all 
references in the Credit Agreement and the other Credit Documents to the 
Credit Agreement shall be deemed to be references to the Credit Agreement as 
modified hereby.

                                   *      *      *















                                         -6-


         IN WITNESSES WHEREOF, the parties hereto have caused their duly 
authorized officers to execute and deliver this Amendment as of the date 
first above written.

                             FSC SEMICONDUCTOR CORPORATION


                             By_______________________

                               Name:

                               Title:



                             FAIRCHILD SEMICONDUCTOR
                               CORPORATION


                             By__________________________

                               Name:

                               Title:




 


                             BANKERS TRUST COMPANY,
                               Individually and as Administrative Agent


                             By___________________________

                               Name:

                               Title:













                             CREDIT SUISSE FIRST BOSTON,
                               Individually and as Syndication Agent


                             By___________________________

                               Name:

                               Title:



                             By___________________________

                               Name:

                               Title:



 


                                  CANADIAN IMPERIAL BANK OF
                                    COMMERCE, Individually and as
                                    Documentation Agent


                                  By___________________________

                                    Name:

                                    Title:









 


                                  ABN AMRO BANK, N.V.


                                  By___________________________

                                    Name:

                                    Title:


                                  By___________________________

                                    Name:

                                    Title:





 
                                       BANKBOSTON, N.A.


                                       By___________________________

                                         Name:

                                         Title:








 


                                  THE BANK OF NOVA SCOTIA


                                  By___________________________

                                    Name:

                                    Title:







 


                                  BANK OF SCOTLAND


                                  By___________________________  

                                    Name:

                                    Title:







 


                                  BANK OF TOKYO-MITSUBISHI


                                  By___________________________

                                    Name:

                                    Title:
















                             BANQUE FRANCAISE DU COMMERCE
                               EXTERIEUR


                             By___________________________

                               Name:

                               Title:















 


                             CHANCELLOR SENIOR SECURED 

                               MANAGEMENT


                             By___________________________

                               Name:

                               Title:



















 


                                  CORESTATES BANK, N.A.


                                  By___________________________

                                    Name:

                                    Title:



























 


                        DRESDNER BANK AG, New York Branch and
                          Grand Cayman Branch



                        By___________________________

                          Name:

                          Title:


                        By___________________________

                          Name:

                          Title:



















 
                                  SENIOR DEBT PORTFOLIO
                                    By Boston Management and Research,

                                    as Investment Advisor


                                  By___________________________

                                    Name:

                                    Title:


















 


                                  FIRST SOURCE FINANCIAL LLP



                                   By First Source Financial, Inc., 

                                   its Agent/Manager


                                  By___________________________

                                    Name:

                                    Title:




















 


                                  FLEET NATIONAL BANK


                                  By___________________________

                                    Name:

                                    Title:

















 


                                  THE FUJI BANK, LIMITED
                                  NEW YORK BRANCH


                                  By___________________________

                                    Name:

                                    Title:






















 
                                  GENERAL ELECTRIC
                                    CAPITAL CORPORATION


                                  By___________________________

                                    Name:

                                    Title:





















 


                             KEYBANK NATIONAL ASSOCIATION


                             By___________________________

                               Name:

                               Title:




















 


                             MERRILL LYNCH SENIOR FLOATING RATE

                               FUND, INC.


                             By___________________________

                               Name:

                               Title:

















 


                             THE MITSUBISHI TRUST & BANKING
                              CORPORATION, LOS ANGELES AGENCY


                             By___________________________

                               Name:

                               Title:
















 
                             PILGRIM AMERICA PRIME RATE TRUST


                             By___________________________

                               Name:

                               Title:























 


                             PNC BANK, NATIONAL ASSOCIATION


                             By___________________________

                               Name:

                               Title:













 


                                  PRIME INCOME TRUST


                                  By___________________________

                                    Name:

                                    Title:







 


                             VAN KAMPEN AMERICAN CAPITAL PRIME
                               RATE INCOME TRUST


                             By___________________________

                               Name:

                               Title:
















                                                                     SCHEDULE I




         See attached.












 

                                                                   SCHEDULE II


         Revolving
           Bank                                                 Loan 
        Commitment                                              _____
        __________

    Bankers Trust Company                             $30,083,333.34

    Credit Suisse First Boston                         30,083,333.33

    Canadian Imperial Bank of Commerce                 10,833,333.33

    PNC Bank National Association                       5,000,000.00

    Fleet National Bank                                 5,000,000.00

    The Fuji Bank, Limited New York Branch              5,000,000.00

    Bank of Scotland                                    4,000,000.00

    ABN Amro Bank, N.V.                                 4,000,000.00

    First Source Financial LLP                          4,000,000.00

    Corestates Bank, N.A.                               4,000,000.00

    Bank of Tokyo-Mitsubishi                            4,000,000.00

    The Bank of Nova Scotia                             4,000,000.00

    The First National Bank of Boston                   4,000,000.00

    General Electric Capital Corporation                4,000,000.00

    Banque Francaise du Commerce Exterieur              4,000,000.00

    The Mitsubishi Trust & Banking Corporation,
     Los Angeles Agency                                 4,000,000.00

    Dresdner Bank AG, New York Branch
     and Grand Cayman Branch                            4,000,000.00

    Van Kampen American Capital Prime Rate Income Trust         --

    Pilgrim America Prime Rate Trust                            --

    Prime Income Trust                                          --

    Merrill Lynch Senior Floating Rate Fund, Inc.               --

         Total                                       $130,000,000.00