EXAR CORP
SC 13G/A, 1999-09-16
SEMICONDUCTORS & RELATED DEVICES
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                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                  SCHEDULE 13G


            INFORMATION STATEMENT TO BE INCLUDED IN STATEMENTS FILED
         PURSUANT TO RULES 13d-1 (b) (c) AND (d) AND AMENDMENTS THERETO
                         FILED PURSUANT TO RULE 13d-2(b)

                               (AMENDMENT NO. 1)*


                                   EXAR CORP.
- --------------------------------------------------------------------------------
                                (Name of Issuer)


                                  COMMON STOCK
- --------------------------------------------------------------------------------
                         (Title of Class of Securities)


                                    300645108
- --------------------------------------------------------------------------------
                                 (CUSIP Number)


                                 August 30, 1999
- --------------------------------------------------------------------------------
             (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-(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 in 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>   2

- -------------------                                          -------------------
CUSIP NO. 300645108                     13G                  PAGE 2  OF  5 PAGES
- -------------------                                          -------------------

- --------------------------------------------------------------------------------
    1       NAME OF REPORTING PERSON
            S.S. or I.R.S. IDENTIFICATION OF ABOVE PERSON

            OPPENHEIMER CAPITAL  (IRS NO. 13-3413767)
- --------------------------------------------------------------------------------
    2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*          (a) [ ]
                                                                       (b) [X]

- --------------------------------------------------------------------------------
    3       SEC USE ONLY


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


            DELAWARE
- --------------------------------------------------------------------------------
      NUMBER OF SHARES             5      SOLE VOTING POWER
       BENEFICIALLY
         OWNED BY                         -0-
           EACH                 ------------------------------------------------
         REPORTING                 6      SHARED VOTING POWER
          PERSON
           WITH                           333,800
                                ------------------------------------------------
                                   7      SOLE DISPOSITIVE POWER

                                          -0-
                                ------------------------------------------------
                                   8      SHARED DISPOSITIVE POWER


                                          333,800
- --------------------------------------------------------------------------------
    9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON


            333,800
- --------------------------------------------------------------------------------
    10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
            EXCLUDES CERTAIN SHARES*                                    [ ]


- --------------------------------------------------------------------------------
    11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)


            3.6
- --------------------------------------------------------------------------------
    12      TYPE OF REPORTING PERSON*


            IA
- --------------------------------------------------------------------------------

                      *SEE INSTRUCTION BEFORE FILLING OUT!



<PAGE>   3

- -------------------                                          -------------------
CUSIP NO. 300645108                     13G                  PAGE 3  OF  5 PAGES
- -------------------                                          -------------------

ITEM 1   (a)      NAME OF ISSUER:
                  Exar Corp

         (b)      ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:
                  48720 Kato Road
                  Freemont, California 94538

ITEM 2   (a)      NAME OF PERSON FILING:
                  OPPENHEIMER CAPITAL

         (b)      ADDRESS OF PRINCIPAL BUSINESS OFFICE:
                  1345 Avenue of the Americas
                  New York, New York 10105

         (c)      CITIZENSHIP:
                  Not Applicable.

         (d)      TITLE OF CLASS OF SECURITIES:
                  Common Stock

         (e)      CUSIP NUMBER:
                  300645108

ITEM 3   IF THIS STATEMENT IS FILED PURSUANT TO RULE 13d-1(b), OR
         13d-2(b), CHECK WHETHER THE PERSON FILING IS A:

         (a)      [ ] Broker or dealer registered under Section 15 of the
                      Exchange Act;

         (b)      [ ] Bank as defined in Section 3(a)(6) of the Exchange Act;

         (c)      [ ] Insurance company as defined in Section 3(a)(19) of the
                      Act;

         (d)      [ ] Investment company registered under Section 8 of the
                      Investment Company Act;

         (e)      [X] Investment adviser registered under Section 203 of the
                      Investment Advisors Act of 1940;

         (f)      [ ] Employee benefit plan or endowment fund in accordance
                      with Rule 13d-1(b)(1)(ii)(f);

         (g)      [ ] Parent holding company or control person, in accordance
                      with 13d-1(b)(ii)(g);

         (h)      [ ] Savings association as defined in Section 3(b) of the
                      Federal Deposit Insurance Act;

         (g)      [ ] Church plan that is excluded from the definition of an
                      investment company under Section 3(c)(14) of the
                      Investment Company Act;

         (j)      [ ] Group, in accordance with Rule13d-1(b)(1)(ii)(h).

         If this statement is filed pursuant to Rule 13d-1(c), check this
         box. [ ]



<PAGE>   4

- -------------------                                          -------------------
CUSIP NO. 300645108                     13G                  PAGE 4  OF  5 PAGES
- -------------------                                          -------------------

ITEM 4   OWNERSHIP.

         (a)   Amount beneficially owned:  333,800**

         (b)   Percent of Class:  3.6

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

               (i)   Sole power to vote or direct the vote: -0-

               (ii)  Shared power to vote: 333,800 **

               (iii) Sole power to dispose or direct the disposition of: -0-

               (iv)  Shared power to dispose or direct the disposition of:
                     333,800 **

 ** This report is being filed on behalf of Oppenheimer Capital, a Delaware
    general partnership and/or certain investment advisory clients or
    discretionary accounts to report the fact that the reporting person has
    ceased to be the beneficial owner five percent or more of the securities of
    the issuer.

ITEM 5   OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS.

         If this statement is being filed to report the fact that as of the date
hereof the reporting person has ceased to be the beneficial owner of more than
five percent of the class of securities, check the following [X].

ITEM 6   OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON.

         Not Applicable.

ITEM 7   IDENTIFICATION AND CLARIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE
         SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY.

         Not Applicable.

ITEM 8   IDENTIFICATION AND CLARIFICATION OF MEMBERS OF THE GROUP.

         Not Applicable.

ITEM 9   NOTICE OF DISSOLUTION OF GROUP.

         Not Applicable.



<PAGE>   5

- -------------------                                          -------------------
CUSIP NO. 300645108                     13G                  PAGE 5  OF  5 PAGES
- -------------------                                          -------------------

ITEM 10  CERTIFICATION.

         By signing below I certify that, to the best of my knowledge and
belief, the securities referred to above were acquired in the ordinary course of
business and were not acquired for the purpose of and do not have 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.


                                             Date: September 7, 1999




                                             /s/ DEBORAH KABACK
                                             -----------------------------------
                                                 Deborah Kaback
                                                 Senior Vice President




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