1
                                                                   EXHIBIT 10.52


                                 WAFERTECH, LLC

                       ASSIGNMENT AND ASSUMPTION AGREEMENT



     THIS ASSIGNMENT AND ASSUMPTION AGREEMENT is made as of January 21, 1999 by
and between Analog Devices, Inc., a Massachusetts corporation ("ADI"), and
Altera Corporation, a Delaware corporation ("Altera").

     WHEREAS, ADI and Altera are members of WaferTech, LLC, a Delaware limited
liability company (the "Company"), and parties to the Second Amended and
Restated Limited Liability Company Agreement of WaferTech, LLC dated as of
October 28, 1997 (the "LLC Agreement");

     WHEREAS, ADI proposes to transfer to Altera a Five Percent (5%) Membership
Interest in the Company, corresponding to Eleven Million Two Hundred Fifty
Thousand (11,250,000) Preferred Shares (the "Interest");

     WHEREAS, the Preferred Members have unanimously consented to the transfer
of the Interest by ADI to Altera pursuant to a Unanimous Written Consent dated
November 30, 1998;

     NOW, THEREFORE, for good and valuable consideration the receipt and
sufficiency of which are hereby acknowledged, the parties hereby agree as
follows:

     1.   Capitalized Terms

          Capitalized terms not otherwise defined in this Agreement have the
meanings assigned to them in the LLC Agreement.

     2.   Assignment and Assumption

          In consideration of (i) the payment of the purchase price in the
amount of Thirty-Seven Million Five Hundred Thousand Six Hundred Forty United
States Dollars (U.S.$37,500,640) (the "Purchase Price") by Altera to ADI as
provided herein and (ii) the assumption by Altera of the obligations associated
with the Interest as set forth in the LLC Agreement and Purchase Agreement, ADI
hereby irrevocably assigns, transfers and conveys to Altera all right, title and
interest in and to, and all benefits and burdens of the ownership of, the
Interest. Altera hereby assumes the obligations associated with the Interest as
set forth in the LLC Agreement and Purchase Agreement.


   2
     3.   Payment

          Altera shall pay the Purchase Price to ADI by the transfer of
immediately available funds denominated in U.S. dollars for value before 2:00
p.m. EST January 29, 1999 to the following account:

                      Analog Devices, Inc.
                      BankBoston
                      Boston, Massachusetts
                      Account No.  521-79901
                      ABA No. 011-000-390

The assignment and assumption contemplated by Section 2 of this Agreement shall
become effective immediately upon receipt by ADI of the full amount of the
Purchase Price in the abovementioned account. Upon receipt of the Purchase
Price, ADI shall deliver to Altera a written receipt therefor in the form of
Exhibit A attached hereto.

     4.   ADI's Representations and Warranties.

          ADI hereby represents and warrants to Altera that:

          (i)  ADI has the full right, power, and authority to execute this
Agreement and to sell the Interest to Altera.

          (ii) The Interest is owned by ADI free and clear of any and all liens,
encumbrances, charges, assessments and restrictions (other than restrictions on
transfer imposed by the LLC Agreement and restrictions on transfer generally
imposed on securities under Federal or state securities laws).

          (iii) Upon transfer of the Interest to Altera pursuant to this
Agreement, Altera will, as a result, receive good title to the Interest, free
and clear of any and all liens, encumbrances, claims, charges, assessments, and
restrictions (other than restrictions on transfer imposed by the LLC Agreement
and restrictions on transfer generally imposed on securities under Federal or
state securities laws).

          (iv) All corporate action on the part of ADI, its directors and
stockholders necessary for the authorization, execution, delivery and
performance by ADI of this Agreement has been taken.

          (v)  The execution, delivery and performance of and compliance with
this Agreement and the sale of the Interest hereunder will not result in any
violation of, or conflict with, or constitute a default under, ADI's charter or
bylaws or any of ADI's material agreements 


                                       -2-
   3
(including but not limited to the LLC Agreement), or result in the creation of
any mortgage, pledge, lien, encumbrance or charge upon the Interest being
transferred.

          (vi) No consent, approval or authorization of, or designation,
declaration or filing with, any governmental authority on the part of ADI is
required in connection with the valid execution and delivery of this Agreement,
the sale of the Interest hereunder or the consummation of any other transaction
contemplated hereby.

          (vii) (a) ADI has consulted its own independent tax advisors with
respect to the transactions contemplated by this Agreement to the extent it
deemed necessary and advisable; (b) ADI is not relying in any respect on
WaferTech or any Managing Member, employee or other agent or representative of
WaferTech to provide any advice with respect to the Federal, state, local or
foreign tax consequences of the transactions contemplated hereby; and (c) ADI
shall bear its own tax consequences, if any, associated with the transactions
contemplated hereby and shall not seek any reimbursement in connection with any
such tax consequences from Altera, WaferTech or any of their affiliates.

     5.   Altera's Representations and Warranties.

          Altera hereby represents and warrants to ADI that:

          (i)  Altera has the full right, power, and authority to execute this
Agreement and to purchase the Interest from ADI.

          (ii) Altera understands and acknowledges that any further transfer of
the Interest by Altera is restricted under the LLC Agreement.

          (iii) Altera is acquiring the Interest for its own account for
investment, and not with a view to distribution.

     6.   Effect on Ancillary Agreements.

          The parties acknowledge and agree that the transfer of the Interest
pursuant to this Agreement will affect the Percentage Interests of ADI and
Altera and, consequently, their respective rights and obligations under the
Purchase Agreement, as well as their respective rights and obligations under the
LLC Agreement, including under Section 19.2 thereof with respect to Future
Purchase Agreements.


                                       -3-
   4
     7.   Miscellaneous.

          (a)  Further Assurances. Each of the parties agrees to promptly
execute and deliver any and all further agreements, documents, or instruments
necessary to effectuate this Agreement and the transaction referred to herein or
reasonably requested by the other party to perfect or evidence its rights
hereunder.

          (b)  Survival of Representations and Warranties. The representations
and warranties contained in this Agreement shall survive the transfer of the
Interest made pursuant to this Agreement.

          (c)  Counterparts. This Agreement may be executed in two or more
counterparts, each of which shall be deemed an original and all of which taken
together shall constitute one and the same instrument, binding on the parties,
and the signature of any party to any counterpart shall be deemed a signature
to, and may be appended to, any other counterpart.

          (d)  Governing Law. This Agreement shall be governed by, and construed
in accordance with, the laws of the State of Delaware.

     IN WITNESS WHEREOF, the parties have executed this Agreement as of the date
set forth above.

                                       ANALOG DEVICES, INC.



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


                                       ALTERA CORPORATION


                                       By: /s/ Nathan M. Sarkisian              
                                           -------------------------------------
                                       Name Nathan M. Sarkisian            
                                            ------------------------------------
                                       Its Senior V.P. & C.F.O.            
                                           -------------------------------------


                                      -4-
   5
                                                                       Exhibit A


                                     RECEIPT


     Analog Devices, Inc. ("ADI") hereby acknowledges receipt of the sum of
Thirty-Seven Million Five Hundred Thousand Six Hundred Forty United States
Dollars (U.S$37,500,640) from Altera Corporation ("Altera") constituting full
payment of the purchase price payable under the Assignment and Assumption
Agreement between ADI and Altera dated as of January 21, 1999. Accordingly the
transfer of the Interest contemplated by the aforesaid Assignment and Assumption
Agreement is effective as of the date hereof.

     IN WITNESS WHEREOF, this Receipt has been executed as of the date set forth
below.


Date:  January 29, 1999                ANALOG DEVICES, INC.


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


                                      -5-