Document:

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                                                                EXHIBIT 10.47(a)

                                  AMENDMENT TO
                          SECOND AMENDED AND RESTATED
                      LIMITED LIABILITY COMPANY AGREEMENT

     THIS AMENDMENT, dated as of November 30, 1998 modifies that certain Second
Amended and Restated Limited Liability Company Agreement of WaferTech, LLC (the
"LLC Agreement") dated as of October 28, 1997, by and among TSMC Development,
Inc., a Delaware corporation ("TSMC"), Analog Devices, Inc., a Massachusetts
corporation ("ADI"), Altera Corporation, a Delaware corporation ("Altera"), and
Integrated Silicon Solutions, Inc., a Delaware corporation ("ISSI").

     WHEREAS, ADI proposes to transfer 9% and 5% interest in WaferTech, LLC
(the "Company") to TSMC and Altera respectively.

     WHEREAS, ISSI proposes to transfer around 1.33% interest in the Company
(equivalent to US$ 10 million worth of ISSI's interest in the Company) to TSMC.

     WHEREAS, the parties hereto recognize that, upon consummation of the
aforementioned transfers, resulting ownership in the Company may no longer
reflect the original intent of the supermajority voting provisions set forth in
Section 6.4.2 of the LLC Agreement.

     WHEREAS, the parties desire to amend the LLC Agreement in order to
properly reflect each remaining Member's interest as originally intended.

     For good and valuable consideration, the receipt and sufficiency of which
is hereby acknowledged, the parties agree as follow:

1.   Pursuant to Section 16.1 of the LLC Agreement, the undersigned Members,
     representing not less than 87% Percentage Interest, agree that the LLC
     Agreement shall be amended as follows:

     a.   Section 6.4.2 of the LLC Agreement is amended by deleting subsections
          6.4.2.1, 6.4.2.2, 6.4.2.5, 6.4.2.10 and 6.4.2.11 in their entirety.

     b.   Section 6.4.3 of the LLC Agreement is amended by adding the following
          subsections.

          6.4.3.6   borrow, guarantee or incur long term debt in any way
                    greater than the amount of US$ 100 million in the aggregate;
<PAGE>   2
     6.4.3.7   determine that a Member or an Affiliate of a Member is a
               Prohibited Person;

     6.4.3.8   authorize or call for any Additional Capital Contribution in an
               amount exceeding US$200 million during any 12-month period and
               US$400 million during any 36-month period;

     6.4.3.9   make any material change or amendment to the most recent capacity
               ramp up schedule incorporated in the Business Plan, which change
               or amendment would result in the Company not being profitable
               for the year 2000;

     6.4.3.10  admit any new Member other than a participant in an Incentive
               Plan.

2.   This amendment shall become effective upon the consummation of the
     aforementioned transfers.

3.   All terms not otherwise defined herein shall have the meanings ascribed to
     them in the LLC Agreement.

4.   This Amendment may be signed in one or more counterparts, each of which
     shall be an original but all of which together shall constitute one
     instrument.

     IN WITNESS WHEREOF, the parties have executed this Amendment as of the
     date first above written.

                                        TSMC DEVELOPMENT, INC.

                                        By: /s/ [Signature Illegible]
                                            --------------------------

                                        ANALOG DEVICES, INC.

                                        By: /s/ [Signature Illegible]
                                            --------------------------

                                        ALTERA CORPORATION

                                        By: /s/ RODNEY SMITH
                                            --------------------------

                                        INTEGRATED SILICON SOLUTIONS, INC.

                                        By: /s/ [Signature Illegible]
                                            --------------------------<PAGE>   1
                                                                EXHIBIT 10.47(b)

                              SECOND AMENDMENT TO
                          SECOND AMENDED AND RESTATED
                      LIMITED LIABILITY COMPANY AGREEMENT

        THIS SECOND AMENDMENT, dated as of January __, 1999, modifies that
certain Second Amended and Restated Limited Liability Company Agreement of
WaferTech, LLC, dated as of October 28, 1997, by and among TSMC Development,
Inc., a Delaware corporation ("TSMC"), Analog Devices, Inc., a Massachusetts
corporation ("ADI"), Altera Corporation, a Delaware corporation ("Altera"), and
Integrated Silicon Solutions, Inc., a Delaware corporation ("ISSI"), as
previously amended by an Amendment dated as of November 30, 1998 (collectively,
the "LLC Agreement").

        WHEREAS, ADI proposes to transfer 9% and 5% interest in WaferTech, LLC
(the "Company") to TSMC and Altera, respectively;

        WHEREAS, ISSI proposes to transfer approximately 1.33% interest in the
Company to TSMC; and

        WHEREAS, the parties desire to attach a new Exhibit A1 to the LLC
Agreement in order to properly reflect each Member's interest in the Company as
a result of the proposed transfers;

        For good and valuable consideration, the receipts and sufficiency of
which is hereby acknowledged, the parties agree as follows:

1.      The undersigned Members acknowledge and agree that consummation of the
        proposed transfers as discussed above will result in new Percentage
        Interests as set forth in the new Exhibit A1 to the LLC Agreement, a
        copy of which is attached hereto. Pursuant to Section 16.1 of the LLC
        Agreement, the undersigned Members, representing not less than 87% in
        Percentage Interest, agree that the LLC Agreement shall be amended by
        appending this new Exhibit A1.

2.      In addition, the undersigned Members acknowledge and agree that their
        respective rights and obligations under the Purchase Agreement and the
        LLC Agreement, including under Section 19.2 of the latter with respect
        to Future Purchase Agreements, shall automatically be revised to reflect
        the new Percentage Interests set forth in this new Exhibit A1.

3.      This Amendment shall become effective upon the consummation of the
        proposed transfers.

4.      All terms not otherwise defined herein shall have the meanings ascribed
        to them in the LLC Agreement.

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5.   This Amendment may be signed in one or more counterparts, each of which
     shall be an original but all of which together shall constitute one
     instrument.

     IN WITNESS WHEREOF, the parties have executed this Second Amendment as of
the date first above written.

                                        TSMC DEVELOPMENT, INC.

                                        By: /s/ [Signature Illegible]
                                            -------------------------

                                        ANALOG DEVICES, INC.

                                        By: /s/ JOSEPH E. MCDONOUGH
                                            -------------------------
                                            Joseph E. McDonough,
                                            V.P. Finance C.F.O.

                                        ALTERA CORPORATION

                                        By: /s/ NATHAN SARKISIAN
                                            -------------------------

                                        INTEGRATED SILICON
                                         SOLUTIONS, INC.

                                        By:
                                            -------------------------
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                     REVISED WAFERTECH LLC EQUITY INTERESTS
                   PER JANUARY 29, 1999, PARTIAL TRANSFER OF
                ADI AND ISSI EQUITY INTERESTS TO TSMC AND ALTERA

<TABLE>
<CAPTION>                                                                                    Percentage Interest
                                 Agreed Total Value of    Transfer                                Following            Number of
Name/Address/Fax Number          Capital Contribution    Adjustment      Adj. Capital Contr.       Transfer         Preferred Shares
-----------------------          ---------------------   ------------    -------------------  -------------------   ----------------
<S>                              <C>                     <C>             <C>                   <C>                    <C>
TSMC Development, Inc.                U.S.$446,403,200     77,501,153           523,904,353             67.5645%         152,012,653
1740 Technology Drive
Suite 660
San Jose, CA 95110
Phone:   (408) 437-8762
Fax:     (408) 441-7713

Analog Devices, Inc.                  U.S.$140,440,000   (105,001,793)           35,398,207                   4%           9,000,000
1 Technology Way
P.O. Box 9106
Norwood, MA 02062
Phone:   (781) 329-4700
Fax:     (781) 461-2491

Altera Corporation                    U.S.$140,400,000     37,500,640           177,900,640                  23%          51,750,000
101 Innovation Drive
San Jose, Ca 95134
Phone:   (408) 544-7000
Fax:     (408) 544-8000

Integrated Silicon Solutions,         U.S.$ 31,200,000    (10,000,000)           21,200,000              2.6667%           6,007,500
Inc.
2231 Lawson Lane
Santa Clara, CA 95054
Phone:   (408) 588-0800
Fax:     (408) 588-0805

  THIRD PARTY                         U.S.$ 21,596,800                           21,596,800            2.768821%           6,229,847
  INVESTORS:

TOTAL CAPITAL                         U.S.$780,000,000                         $780,000,000                 100%         225,000,000
CONTRIBUTION

</TABLE><PAGE>   1
                                   EXHIBIT 4.1

NUMBER STC___________   SOFTWARE TECHNOLOGIES CORPORATION     ___________ SHARES

INCORPORATED UNDER THE LAWS OF                                  SEE REVERSE FOR
   THE STATE OF CALIFORNIA                                   CERTAIN DEFINITIONS
                                                               CUSIP 834040 10 7

        THIS CERTIFIES THAT ___________________________ is the owner of
___________________________________ fully paid and non-assessable shares of the
Common Stock, no par value, of SOFTWARE TECHNOLGIES CORPORATION transferable on
the books of the Corporation by the holder hereof in person or by duly
authorized attorney upon surrender of this certificate properly endorsed. This
certificate is not valid unless countersigned and registered by the Transfer
Agent and Registrar.

        WITNESS the facsimile seal of the Corporation and the facsimile
signatures of its duly authorized officers.

Dated:

/s/ BARRY PLAGA                              /s/ JAMES T. DEMETRIADES
-----------------------------------          -----------------------------------
Chief Financial Officer and                  Chairman of the Board and
   Assistant Secretary                          Chief Executive Officer

<PAGE>   2

                       SOFTWARE TECHNOLOGIES CORPORATION

        A statement of the rights, preferences, privileges and restrictions
granted to or imposed upon the respective classes or series of shares or upon
the holders thereof as established, from time to time, by the Articles of
Incorporation of the Corporation and by any certificate of determination, and
the number of shares constituting each class and series and the designations
thereof, may be obtained by the holder hereof upon request and without charge
from the Secretary of the Corporation at its corporate headquarters.

        The following abbreviations, when used in the inscription on the face of
this certificate, shall be construed as though they were written out in full
according to applicable laws or regulations:

<TABLE>
<S>                                                     <C>
  TEN COM     --  as tenants in common                  UNIF GIFT MIN ACT -- _____________Custodian____________
  TEN ENT     --  as tenants by the entireties                                 (Cust)                 (Minor)
  JT TEN      --  as joint tenants with rights                               under Uniform Gifts to Minors
                  of survivorship and not as                                 Act _______________________________
                  tenants in common                                                         (State)
                                                        UNIF TRF MIN ACT -- _________Custodian (until age ______)
                                                                              (Cust)
                                                                            ______________ under Uniform Transfers
                                                                              (Minor)
                                                                            to Minors Act ______________________
                                                                                                  (State)
</TABLE>

     Additional abbreviations may also be used though not in the above list.

        FOR VALUE RECEIVED, ____________________________________________ hereby
sell, assign and transfer unto

PLEASE INSERT SOCIAL SECURITY OR OTHER
  IDENTIFYING NUMBER OF ASSIGNEE

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

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

________________________________________________________________________________
 (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE)

________________________________________________________________________________

________________________________________________________________________________

_________________________________________________________________________ Shares
of the common stock represented by the within Certificate, and do hereby
irrevocably constitute and appoint

_______________________________________________________________________ Attorney
to transfer the said stock on the books of the within named Corporation with
full power of substitution in the premises.

Dated_________________________

                                        X
                                         ---------------------------------------
                                        X
                                         ---------------------------------------
                                 NOTICE: THE SIGNATURE(S) TO THIS ASSIGNMENT
                                         MUST CORRESPOND WITH THE NAME(S) AS
                                         WRITTEN UPON THE FACE OF THE
                                         CERTIFICATE IN EVERY PARTICULAR,
                                         WITHOUT ALTERATION OR ENLARGEMENT OR
                                         ANY CHANGE WHATEVER.

Signature(s) Guaranteed

By
  --------------------------------------
THE SIGNATURES MUST BE GUARANTEED BY AN
ELIGIBLE GUARANTOR INSTITUTION (BANKS,
STOCKBROKERS, SAVINGS AND LOAN
ASSOCIATIONS AND CREDIT UNIONS WITH
MEMBERSHIP IN AN APPROVED SIGNATURE
GUARANTEE MEDALLION PROGRAM), PURSUANT
TO S.E.C. RULE 17Ad 15.

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