Exhibit 10.5

                      EXECUTIVE RETENTION PROGRAM ADDENDUM
                                       TO
                             STOCK OPTION AGREEMENT


            The following provisions are hereby incorporated into, and are
hereby made a part of that certain Stock Option Agreement (the "Option
Agreement") by and between Broadcom Corporation, a California corporation (the
"Corporation"), and ________________________ ("Optionee") evidencing a stock
option granted this day to Optionee (the "Option") under the terms of the
Corporation's 1998 Stock Incentive Plan, as amended and restated (the "Plan").
The provisions of this Addendum shall be effective immediately.

            Optionee is a participant in the Corporation's special retention
program pursuant to the terms of the letter agreement between the Corporation
and Optionee dated ___________, 200__ (the "Retention Program Agreement"). The
purpose of this Addendum is to supplement the terms of the Option Agreement so
that those terms conform to the special benefits to which Optionee will become
entitled pursuant to the Retention Program Agreement should Optionee's
employment with the Corporation terminate under certain specified circumstances.

            All capitalized terms in this Addendum, to the extent not otherwise
defined herein, shall have the meanings assigned to them in the Retention
Program Agreement, including the Appendix thereto.

                             SPECIAL OPTION BENEFITS

            1. If an Event should occur during the Term the Retention Program
Agreement is in effect, and within nine (9) months after that Event, either the
Corporation terminates the Optionee's employment other than for Cause or
Disability, or Optionee terminates his employment with the Corporation for Good
Reason, then Optionee shall immediately become entitled to the following
additional benefits to the extent the Option is at that time outstanding:

                  (i) Optionee shall, immediately on the Date of Termination, be
       credited with an additional twenty-four (24) months of employment with
       the Corporation for purposes of the vesting schedule in effect for the
       Option so that Optionee shall be immediately vested in the Option to the
       same extent as if Optionee had completed an additional twenty-four (24)
       months of employment with the Corporation prior to the Date of
       Termination, and

                  (ii) the Option shall remain exercisable, for any or all of
       the shares in which the Optionee is vested on the Date of Termination
       (including the shares which vest on an accelerated basis in accordance
       with subparagraph (i) above), until the EARLIER of (A) the expiration of
       the twenty-four (24)-month period measured from the Date of Termination
       or (B) the specified expiration date of the Option term.

            2. To the extent any of the benefits provided pursuant to this
Addendum shall be deemed to constitute a parachute payment under Section 280G of
the Internal Revenue Code,

then those benefits shall be subject to the parachute payment limitation
provisions of the Retention Program Agreement.

            3. In no event shall Optionee be entitled to any benefits pursuant
to this Addendum unless (i) Optionee shall have executed and delivered to the
Corporation the general release required under Paragraph 9(b) of the Appendix to
the Retention Program Agreement, (ii) such release shall have become effective
in accordance with applicable law, and (iii) Optionee is in material compliance
with his obligations to the Corporation pursuant to his Confidentiality and
Invention Assignment Agreement during and subsequent to the term of the
Retention Program Agreement.

            4. To the extent the provisions of this Addendum conflict with the
provisions of the Option Agreement (including, without limitation, the
provisions of Paragraph 5 of such Option Agreement), the provisions of this
Addendum shall be controlling.

            5. Except to the extent modified by this Addendum, all the terms and
conditions of the Option Agreement shall continue in full force effect.

            6. Optionee hereby acknowledges that the Option shall cease to
qualify for favorable tax treatment as an incentive stock option under the
federal tax laws (if the Option is designated as an Incentive Stock Option in
the Notice of Grant of Stock Option relating to such Option) if (and to the
extent) the Option is exercised: (A) more than three (3) months after the date
Optionee ceases to be an Employee for any reason other than death or Permanent
Disability or (B) more than twelve (12) months after the date Optionee ceases to
be an Employee by reason of Permanent Disability. For purposes of this Paragraph
6, the terms "EMPLOYEE" and "PERMANENT DISABILITY" shall have the meanings
assigned to them in the Option Agreement.

            IN WITNESS WHEREOF, BROADCOM CORPORATION has caused this Addendum to
be executed by its duly-authorized officer, and Optionee has executed this
Addendum, all as of the Effective Date specified below.

                                 BROADCOM CORPORATION


                                 By:
                                        --------------------------------------
                                 Title:
                                        --------------------------------------

                              OPTIONEE

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



EFFECTIVE DATE:                  , 200
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