WARBURG PINCUS ASSET MANAGEMENT INC
SC 13G/A, 1999-01-13
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<PAGE>

                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934

                           (Amendment No. _____2____)*

                                 Burr-Brown Corp
                                (Name of Issuer)

                                  Common Stock
                         (Title of Class of Securities)

                                    12257410
                                 (CUSIP Number)

                                December 31, 1998
             (Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

                                [X] Rule 13d-1(b)
                                [ ] Rule 13d-1(c)
                                [ ] Rule 13d-1(d)

*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).


                               Page 1 of 4 Pages



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- ----------------------------                           -------------------------
CUSIP No.  12257410                    13G             Page  2 of   4  Pages
           --------                                         ---   -----
- ----------------------------                           -------------------------

- ---------- ---------------------------------------------------------------------
        1  NAME OF REPORTING PERSON
           S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

           Warburg Pincus Asset Management, Inc.                    13-2673503
- ---------- ---------------------------------------------------------------------
        2  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
                                                                     (a) [ ]

                                                                     (b) [ ]
           Not applicable                                                       
- ---------- ---------------------------------------------------------------------
        3  SEC USE ONLY

- ---------- ---------------------------------------------------------------------
        4  CITIZENSHIP OR PLACE OF ORGANIZATION

           Delaware
- -------------------- ------ ----------------------------------------------------
                         5  SOLE VOTING POWER

                            1,637,399
                     ------ ----------------------------------------------------
     NUMBER OF           6  SHARED VOTING POWER
      SHARES
   BENEFICIALLY             404,200
     OWNED BY
      EACH           ------ ----------------------------------------------------
    REPORTING            7  SOLE DISPOSITIVE POWER
     PERSON
      WITH                  2,065,274
       
                     ------ ----------------------------------------------------
                         8  SHARED DISPOSITIVE POWER

                            0
- ---------- ---------------------------------------------------------------------
        9  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

           2,065,274
- ---------- ---------------------------------------------------------------------
       10  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
           (SEE INSTRUCTIONS)
     
           Not applicable
- ---------- ---------------------------------------------------------------------
       11  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

           5.60%
- ---------- ---------------------------------------------------------------------
       12  TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
           IA

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


<PAGE>


            


Item 1(a):                   Name of Issuer:
- ----------                   ---------------

                             Burr-Brown Corp

Item 1(b):                   Address of Issuer's Principal Executive Offices:
- ----------                   ------------------------------------------------

                             6730 S. Tucson Blvd.
                             Tucson, AZ  85706


Item 2(a)                    Name of Person Filing
- ---------                    ---------------------

                             Warburg Pincus Asset Management, Inc.

Item 2(b):                   Address of Principal Business Office:
- ----------                   -------------------------------------

                             466 Lexington Avenue, New York, New York 10017

Item 2(c):                   Citizenship:
- ----------                   ------------

                             Delaware

Item 2(d):                   Title of Class of Securities:
- ----------                   -----------------------------

                             Common Stock

Item 2(e):                   CUSIP Number:
- ----------                   -------------

                             12257410

Item 3:                      If the reporting person is an investment
                             adviser in accordance with
                             ss. 240.13d-1(b)(1)(ii)(E), check this box.
                             [X]

Item 4:                      Ownership:
- -------                      ----------

                             (a) Amount beneficially owned: 2,065,274

                             (b) Percent of class:  5.60%

                             (c)  Number of shares as to which the  person
                                  has:

                                    (i)    Sole power to vote or to direct
                                           the vote 1,637,399

                                    (ii)   Shared power to vote or to direct
                                           the vote 404,200.

                                    (iii)  Sole  power  to  dispose  or to
                                           direct the disposition of 2,065,274

                                    (iv)   Shared  power to  dispose  or to
                                           direct the disposition of 0.


Item 5:                      Ownership of Five Percent or Less of a Class:
- -------                      ---------------------------------------------

                             Not Applicable.


                               Page 3 of 4 Pages


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Item 6:                      Ownership of More than Five Percent on Behalf of
- -------                      ------------------------------------------------
                             Another Person:
                             ---------------

                             Warburg Pincus Asset Management, Inc. ("WPAM") is
                             an Investment Adviser registered with the United
                             States Securities and Exchange Commission. WPAM
                             serves as investment adviser to many accounts
                             including various registered investment companies.
                             The securities which are the subject of this
                             report are owned by our accounts. In this report
                             no account owned more than 5%.


Item 7:                      Identification and Classification of the
- -------                      ----------------------------------------
                             Subsidiary Which Acquired the Security Being
                             --------------------------------------------
                             Reported on By the Parent Holding Company:
                             ------------------------------------------

                             Not Applicable.

Item 8:                      Identification and Classification of
- -------                      ------------------------------------
                             Members of the Group:
                             ---------------------

                             Not Applicable.

Item 9:                      Notice of Dissolution of Group:
- -------                      -------------------------------

                             Not Applicable.

Item 10:                     Certification:
- --------                     --------------

                             By signing below I certify that, to the best of my
                             knowledge and belief, the securities referred to
                             above were acquired and are held in the ordinary
                             course of business and were not acquired and are
                             not held for the purpose of or with the effect of
                             changing or influencing the control of the issuer
                             of the securities and were not acquired and are
                             not held in connection with or as a participant in
                             any transaction having that purpose or effect.



                                    SIGNATURE
                                    ---------

          After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information  set forth in this statement is true,  complete and
correct.

Dated:      January 8, 1999



                                            By: /s/ Linda S. Iovan
                                                ------------------------
                                                Name:  Linda S. Iovan
                                                Title: Vice President

                                            


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