<PAGE>   1
As filed with the Securities and Exchange Commission on May 3, 1999.
                                                  Registration No. 333-_________
================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM S-8
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

                       INTEGRATED DEVICE TECHNOLOGY, INC.
             (Exact name of Registrant as specified in its charter)

           Delaware                                            94-2669985
(State or other jurisdiction of                             (I.R.S. Employer
incorporation or organization)                             Identification No.)

         2975 Stender Way
      Santa Clara, California                                      95054
(Address of Principal Executive Office)                         (Zip Code)

                             1989 Stock Option Plan
                             1995 Stock Option Plan
                          Directors' Stock Option Plan
             Options Granted by Quality Semiconductor, Inc. Assumed
                                by the Registrant
                            (Full title of the plans)

         JACK MENACHE, ESQ.                                 Copy to:
   Vice President, General Counsel                  Dennis R. DeBroeck, Esq.
            and Secretary                              Craig Menden, Esq.
 Integrated Device Technology, Inc.                    Fenwick & West LLP
          2975 Stender Way                            Two Palo Alto Square
   Santa Clara, California  95054                  Palo Alto, California 94306
        (408) 727-6116                                 (650) 494-0600
    (Name, address and telephone                   (Counsel to the Registrant)
    number, including area code,
        of agent for service)

<TABLE>
<CAPTION>
                                         CALCULATION OF REGISTRATION FEE
----------------------------------------------------------------------------------------------------------------------
    Title Of Each Class Of                   Amount             Proposed Maximum         Proposed           Amount Of
        Securities To                         To Be              Offering Price     Maximum Aggregate     Registration
        Be Registered                      Registered             Per Share(2)      Offering Price(2)          Fee
----------------------------------------------------------------------------------------------------------------------
<S>                                    <C>                      <C>                 <C>                   <C>   
Common Stock, $.001 par value          1,041,323 shares(1)           $5.44              $5,664,797           $1,575
----------------------------------------------------------------------------------------------------------------------
</TABLE>

(1)    Shares subject to options outstanding as of April 27, 1999 which were
       assumed from Quality Semiconductor, Inc., a California corporation, which
       was acquired by the Registrant on April 30, 1999.

(2)    Calculated in accordance with Rule 457(h)(1) under the Securities Act of
       1933, as amended (the "Securities Act"), based upon the weighted average
       exercise price of the options assumed by the Registrant.

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

        The Registration Statement shall become effective upon filing in
accordance with Rule 462 under the Securities Act.


<PAGE>   2
                                     PART I

              INFORMATION REQUIRED IN THE SECTION 10(A) PROSPECTUS

Item 1. Plan Information.*

Item 2. Registrant Information and Employee Plan Annual Information.*


*       Information required by Part I to be contained in the Section 10(a)
        prospectus is omitted from the Registration Statement in accordance with
        Rule 428 under the Securities Act and the Note to Part I of Form S-8.


                                     PART II

               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

Item 3. Incorporation of Certain Documents by Reference.

        There are hereby incorporated by reference in this Registration
Statement the following documents and information heretofore filed with the
Securities and Exchange Commission:

                (1)     The Registrant's Annual Report on Form 10-K for the
        fiscal year ended March 29, 1998, filed pursuant to Section 13 of the
        Securities Exchange Act of 1934, as amended (the "Exchange Act").

                (2)     The Registrant's Quarterly Reports on Form 10-Q for the
        quarters ended June 28, 1998, September 27, 1998 and December 27, 1998
        filed pursuant to Section 13 of the Exchange Act.

                (3)     The description of the Registrant's Common Stock to be
        offered hereby which is contained in its Registration Statement on Form
        8-B filed September 24, 1987, as amended by the Registrant's Form 8
        dated March 28, 1989 and the Registrant's Form 8-B/A filed October 19,
        1995, and the Registrant's Registration Statement on Form 8-A dated
        December 23, 1998.

                (4)     The Registrant's Current Report on Form 8-K dated
        December 21, 1998 filed pursuant to Section 13 or 15(d) of the Exchange
        Act.

        All documents filed by the Registrant pursuant to Sections 13(a) and
(c), 14 and 15(d) of the Exchange Act after the date of this Registration
Statement, and prior to the filing of a post-effective amendment which indicates
that all securities offered have been sold or which deregisters all securities
then remaining unsold, shall be deemed to be incorporated by reference in this
Registration Statement and to be a part hereof from the date of filing of such
documents.

Item 4. Description of Securities.

        Not applicable.


                                      -2-
<PAGE>   3
Item 5. Interests of Named Experts and Counsel.

        None.

Item 6. Indemnification of Directors and Officers.

        Section 145 of the Delaware General Corporation Law permits a
corporation to grant indemnification to directors, officers and other agents in
terms sufficiently broad to permit indemnification under certain circumstances
for liabilities, including expenses, arising in connection with the Securities
Act of 1933, as amended. Pursuant to the Bylaws of the Registrant, directors and
officers of the Registrant are indemnified to the fullest extent permitted by
law against all expenses (including attorneys' fees), judgments, fines or
settlement amounts incurred or paid by them in any action or proceeding,
including any action by or on behalf of the Registrant, on account of their
service as an officer or director of the Registrant. The Bylaws further provide
that the rights conferred under such Bylaws shall not be deemed exclusive of any
other right to which such persons may be entitled under Delaware General
Corporation Law, the Registrant's Certificate of Incorporation, any bylaw,
agreement, vote of stockholders or disinterested directors or otherwise. The
Restated Certificate of Incorporation of the Registrant, as amended, precludes,
with certain exceptions, the Registrant and its stockholders from recovering
monetary damages from directors for business decisions that breach such
directors' fiduciary duty.

        The Registrant also maintains directors and officers insurance policies
which insure directors and officers against losses arising from certain wrongful
acts in their official capacities and reimburses the Registrant for such loss
for which the Registrant has lawfully indemnified the directors and officers. In
addition, the Registrant has entered into an Indemnification Agreement with each
of its directors and officers whereby the Registrant has agreed to indemnify
each director and officer from and against any and all expenses, losses, claims,
damages and liabilities incurred by such director or officer while acting in his
or her official capacity.

        The Underwriting Agreement among the Registrant and the underwriters of
the Registrant's May 1995 public offering contains certain provisions pursuant
to which the underwriters may, under certain circumstances, indemnify the
directors and officers of the Registrant. Directors and officers of the
Registrant may also be indemnified in certain circumstances under the terms of
other underwriting agreements entered into by the Registrant in connection with
prior public offerings.

Item 7. Exemption from Registration Claimed.

        Not applicable.

Item 8. Exhibits.

        See Index to Exhibits.

Item 9. Undertakings.

        (a)     The undersigned Registrant hereby undertakes:

                (1)     To file, during any period in which offers or sales are
                        being made, a post-effective amendment to this
                        Registration Statement:


                                      -3-
<PAGE>   4
                        (i)     to include any prospectus required by Section
                                10(a)(3) of the Securities Act;

                        (ii)    to reflect in the prospectus any facts or events
                                arising after the effective date of the
                                Registration Statement (or the most recent
                                post-effective amendment thereof) which,
                                individually or in the aggregate, represent a
                                fundamental change in the information set forth
                                in the Registration Statement. Notwithstanding
                                the foregoing, any increase or decrease in
                                volume of securities offered (if the total
                                dollar value of securities offered would not
                                exceed that which was registered) and any
                                deviation from the low or high end of the
                                estimated maximum offering range may be
                                reflected in the form of prospectus filed with
                                the Securities and Exchange Commission pursuant
                                to Rule 424(b) if, in the aggregate, the changes
                                in volume and price represent no more than a 20
                                percent change in the maximum aggregate offering
                                price set forth in the "Calculation of
                                Registration Fee" table in the effective
                                Registration Statement;

                        (iii)   to include any material information with respect
                                to the plan of distribution not previously
                                disclosed in the Registration Statement or any
                                material change to such information in the
                                Registration Statement.

                (2)     That, for the purpose of determining any liability under
                        the Securities Act of 1933, each such post-effective
                        amendment shall be deemed to be a new registration
                        statement relating to the securities offered therein,
                        and the offering of such securities at that time shall
                        be deemed to be the initial bona fide offering hereof.

                (3)     To remove from registration by means of a post-effective
                        amendment any of the securities being registered which
                        remain unsold at the termination of the offering.

        (b)     The undersigned Registrant hereby further undertakes that, for
                purposes of determining any liability under the Securities Act,
                each filing of the Registrant's annual report pursuant to
                Section 13(a) or Section 15(d) of the Exchange Act (and, where
                applicable, each filing of an employee benefit plan's annual
                report pursuant to Section 15(d) of the Exchange Act) that is
                incorporated by reference in the Registration Statement shall be
                deemed to be a new registration statement relating to the
                securities offered therein, and the offering of such securities
                at that time shall be deemed to be the initial bona fide
                offering thereof.

        (c)     Insofar as indemnification for liabilities arising under the
                Securities Act may be permitted to directors, officers and
                controlling persons of the Registrant pursuant to the foregoing
                provisions, or otherwise, the Registrant has been advised that
                in the opinion of the Securities and Exchange Commission such
                indemnification is against public policy as expressed in the
                Securities Act and is, therefore, unenforceable. In the event
                that a claim for indemnification against such liabilities (other
                than the payment by the Registrant of 


                                      -4-
<PAGE>   5
                expenses incurred or paid by a director, officer or controlling
                person of the Registrant in the successful defense of any
                action, suit or proceeding) is asserted by such director,
                officer or controlling person in connection with the securities
                being registered, the Registrant will, unless in the opinion of
                its counsel the matter has been settled by controlling
                precedent, submit to a court of appropriate jurisdiction the
                question whether such indemnification by it is against public
                policy as expressed in the Securities Act and will be governed
                by the final adjudication of such issue.



             [THE REMAINDER OF THIS PAGE LEFT INTENTIONALLY BLANK.]


                                      -5-
<PAGE>   6
                                   SIGNATURES

        Pursuant to the requirements of the Securities Act, the Registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-8, and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Santa Clara, State of California, on April 30, 1999.

                                     INTEGRATED DEVICE TECHNOLOGY, INC.


                                     By: /s/ ALAN F. KROCK
                                         ---------------------------------------
                                         Alan F. Krock,
                                         Vice President, Chief Financial Officer


                                POWER OF ATTORNEY

        KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears
below constitutes and appoints Alan Krock and Jack Menache, and each of them,
his or her true and lawful attorneys-in-fact and agents, each with full power of
substitution and resubstitution, for him and in his name, place and stead, in
any and all capacities, to sign any and all amendments, including post-effective
amendments, to this Registration Statement, and to file the same, with exhibits
thereto and other documents in connection therewith, with the Securities and
Exchange Commission granting unto said attorneys-in-fact and agents, and each of
them, full power and authority to do and perform each and every act and thing
requisite and necessary to be done, as fully to all intents and purposes as he
might or could do in person, hereby ratifying and confirming all that said
attorneys-in-fact and agents, or his substitute or substitutes, may do or cause
to be done by virtue hereof.

        Pursuant to the requirements of the Securities Act, this Registration
Statement has been signed by the following persons in the capacities and on the
dates indicated:

<TABLE>
<CAPTION>
          Signature                                     Title                                    Date
          ---------                                     -----                                    ----
<S>                                       <C>                                                  <C>

/s/ D. JOHN CAREY                         Chairman of the Board of Directors                    April 30, 1999
-------------------------------
D. John Carey

/s/ LEONARD C. PERHAM                     Chief Executive Officer and Director                  April 30, 1999
-------------------------------
Leonard C. Perham

/s/ CARL E. BERG                          Director                                              April 30, 1999
-------------------------------
Carl E. Berg

/s/ JOHN C. BOLGER                        Director                                              April 30, 1999
-------------------------------
John C. Bolger

                                          Director                                              
-------------------------------
Federico Faggin
</TABLE>


                                      -6-
<PAGE>   7
                                INDEX TO EXHIBITS

          Exhibit
           Number                              Exhibit
          -------                              -------

            4.01*       Restated Certificate of Incorporation (previously filed
                        as Exhibit 3A to the Registration Statement on Form 8-B
                        dated September 23, 1987).

            4.02*       Certificate of Amendment of Restated Certificate of
                        Incorporation (previously filed as Exhibit 3(a) to the
                        Registration Statement on Form 8 dated March 28, 1989).

            4.03*       Certificate of Amendment of Restated Certificate of
                        Incorporation (previously filed as Exhibit 4.3 to the
                        Registration Statement on Form S-8 (File Number
                        33-63133) filed on October 2, 1995).


            4.04*       Certificate of Designations specifying the terms of the
                        Series A Junior Participating Preferred Stock of IDT, as
                        filed with the Secretary of State of Delaware on
                        December 22, 1998 (previously filed as Exhibit 3.6 to
                        Registration Statement on Form 8--A filed December 23,
                        1998).

            4.05*       Bylaws of IDT, as amended and restated, effective
                        December 21, 1998 (previously filed as Exhibit 3.1 to
                        Current Report on Form 8-K filed December 23, 1998).

            4.06*       Rights Agreement, dated December 21, 1998, between IDT 
                        and BankBoston, N.A. as Rights Agent (previously filed
                        as Exhibit 4.1 to Registration Statement on Form 8--A
                        filed December 23, 1998).

            4.07*       Form of Indenture between IDT and The First National 
                        Bank of Boston, as Trustee, including Form of Notes
                        (previously filed as Exhibit 4.6 to the S-3 Registration
                        Statement (File number 33-59443).

            4.08        Quality Semiconductor, Inc. 1989 Stock Option Plan

            4.09        Quality Semiconductor, Inc. 1995 Stock Option Plan

            4.10        Quality Semiconductor, Inc. Director's Stock Option Plan

            5.1         Opinion of Fenwick & West LLP, regarding legality of
                        securities to be offered.

            23.1        Consent of PricewaterhouseCoopers LLP, Independent
                        Accountants.


                                      -7-
<PAGE>   8
            23.2        Consent of Fenwick & West LLP (included in Exhibit 5.1).

            24.1        Power of Attorney (see page 6).

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

*    The exhibits were previously filed with the Commission as indicated and are
     incorporated herein by reference.


                                      -8-
[{"type": "S-8", "sequence": "1", "description": "FORM S-8", "secsgml_size_bytes": 20628}]
{"company-data": {"conformed-name": "INTEGRATED DEVICE TECHNOLOGY INC", "cik": "0000703361", "assigned-sic": "3674", "irs-number": "942669985", "state-of-incorporation": "DE", "fiscal-year-end": "0331"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-77559", "film-number": "99608281"}, "business-address": {"street1": "2975 STENDER WAY", "city": "SANTA CLARA", "state": "CA", "zip": "95054", "phone": "4087276116"}, "mail-address": {"street1": "2975 STENDER WAY", "city": "SANTA CLARA", "state": "CA", "zip": "95054"}}
1
As filed with the Securities and Exchange Commission on May 3, 1999.
                                                  Registration No. 333-_________
================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM S-8
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

                       INTEGRATED DEVICE TECHNOLOGY, INC.
             (Exact name of Registrant as specified in its charter)

           Delaware                                            94-2669985
(State or other jurisdiction of                             (I.R.S. Employer
incorporation or organization)                             Identification No.)

         2975 Stender Way
      Santa Clara, California                                      95054
(Address of Principal Executive Office)                         (Zip Code)

                             1989 Stock Option Plan
                             1995 Stock Option Plan
                          Directors' Stock Option Plan
             Options Granted by Quality Semiconductor, Inc. Assumed
                                by the Registrant
                            (Full title of the plans)

         JACK MENACHE, ESQ.                                 Copy to:
   Vice President, General Counsel                  Dennis R. DeBroeck, Esq.
            and Secretary                              Craig Menden, Esq.
 Integrated Device Technology, Inc.                    Fenwick & West LLP
          2975 Stender Way                            Two Palo Alto Square
   Santa Clara, California  95054                  Palo Alto, California 94306
        (408) 727-6116                                 (650) 494-0600
    (Name, address and telephone                   (Counsel to the Registrant)
    number, including area code,
        of agent for service)
CALCULATION OF REGISTRATION FEE
----------------------------------------------------------------------------------------------------------------------
    Title Of Each Class Of                   Amount             Proposed Maximum         Proposed           Amount Of
        Securities To                         To Be              Offering Price     Maximum Aggregate     Registration
        Be Registered                      Registered             Per Share(2)      Offering Price(2)          Fee
----------------------------------------------------------------------------------------------------------------------
Common Stock, $.001 par value          1,041,323 shares(1)           $5.44              $5,664,797           $1,575
----------------------------------------------------------------------------------------------------------------------
(1)    Shares subject to options outstanding as of April 27, 1999 which were
       assumed from Quality Semiconductor, Inc., a California corporation, which
       was acquired by the Registrant on April 30, 1999.

(2)    Calculated in accordance with Rule 457(h)(1) under the Securities Act of
       1933, as amended (the "Securities Act"), based upon the weighted average
       exercise price of the options assumed by the Registrant.

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

        The Registration Statement shall become effective upon filing in
accordance with Rule 462 under the Securities Act.
2
                                     PART I

              INFORMATION REQUIRED IN THE SECTION 10(A) PROSPECTUS

Item 1. Plan Information.*

Item 2. Registrant Information and Employee Plan Annual Information.*

*       Information required by Part I to be contained in the Section 10(a)
        prospectus is omitted from the Registration Statement in accordance with
        Rule 428 under the Securities Act and the Note to Part I of Form S-8.

                                     PART II

               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

Item 3. Incorporation of Certain Documents by Reference.

        There are hereby incorporated by reference in this Registration
Statement the following documents and information heretofore filed with the
Securities and Exchange Commission:

                (1)     The Registrant's Annual Report on Form 10-K for the
        fiscal year ended March 29, 1998, filed pursuant to Section 13 of the
        Securities Exchange Act of 1934, as amended (the "Exchange Act").

                (2)     The Registrant's Quarterly Reports on Form 10-Q for the
        quarters ended June 28, 1998, September 27, 1998 and December 27, 1998
        filed pursuant to Section 13 of the Exchange Act.

                (3)     The description of the Registrant's Common Stock to be
        offered hereby which is contained in its Registration Statement on Form
        8-B filed September 24, 1987, as amended by the Registrant's Form 8
        dated March 28, 1989 and the Registrant's Form 8-B/A filed October 19,
        1995, and the Registrant's Registration Statement on Form 8-A dated
        December 23, 1998.

                (4)     The Registrant's Current Report on Form 8-K dated
        December 21, 1998 filed pursuant to Section 13 or 15(d) of the Exchange
        Act.

        All documents filed by the Registrant pursuant to Sections 13(a) and
(c), 14 and 15(d) of the Exchange Act after the date of this Registration
Statement, and prior to the filing of a post-effective amendment which indicates
that all securities offered have been sold or which deregisters all securities
then remaining unsold, shall be deemed to be incorporated by reference in this
Registration Statement and to be a part hereof from the date of filing of such
documents.

Item 4. Description of Securities.

        Not applicable.

                                      -2-
3
Item 5. Interests of Named Experts and Counsel.

        None.

Item 6. Indemnification of Directors and Officers.

        Section 145 of the Delaware General Corporation Law permits a
corporation to grant indemnification to directors, officers and other agents in
terms sufficiently broad to permit indemnification under certain circumstances
for liabilities, including expenses, arising in connection with the Securities
Act of 1933, as amended. Pursuant to the Bylaws of the Registrant, directors and
officers of the Registrant are indemnified to the fullest extent permitted by
law against all expenses (including attorneys' fees), judgments, fines or
settlement amounts incurred or paid by them in any action or proceeding,
including any action by or on behalf of the Registrant, on account of their
service as an officer or director of the Registrant. The Bylaws further provide
that the rights conferred under such Bylaws shall not be deemed exclusive of any
other right to which such persons may be entitled under Delaware General
Corporation Law, the Registrant's Certificate of Incorporation, any bylaw,
agreement, vote of stockholders or disinterested directors or otherwise. The
Restated Certificate of Incorporation of the Registrant, as amended, precludes,
with certain exceptions, the Registrant and its stockholders from recovering
monetary damages from directors for business decisions that breach such
directors' fiduciary duty.

        The Registrant also maintains directors and officers insurance policies
which insure directors and officers against losses arising from certain wrongful
acts in their official capacities and reimburses the Registrant for such loss
for which the Registrant has lawfully indemnified the directors and officers. In
addition, the Registrant has entered into an Indemnification Agreement with each
of its directors and officers whereby the Registrant has agreed to indemnify
each director and officer from and against any and all expenses, losses, claims,
damages and liabilities incurred by such director or officer while acting in his
or her official capacity.

        The Underwriting Agreement among the Registrant and the underwriters of
the Registrant's May 1995 public offering contains certain provisions pursuant
to which the underwriters may, under certain circumstances, indemnify the
directors and officers of the Registrant. Directors and officers of the
Registrant may also be indemnified in certain circumstances under the terms of
other underwriting agreements entered into by the Registrant in connection with
prior public offerings.

Item 7. Exemption from Registration Claimed.

        Not applicable.

Item 8. Exhibits.

        See Index to Exhibits.

Item 9. Undertakings.

        (a)     The undersigned Registrant hereby undertakes:

                (1)     To file, during any period in which offers or sales are
                        being made, a post-effective amendment to this
                        Registration Statement:

                                      -3-
4
                        (i)     to include any prospectus required by Section
                                10(a)(3) of the Securities Act;

                        (ii)    to reflect in the prospectus any facts or events
                                arising after the effective date of the
                                Registration Statement (or the most recent
                                post-effective amendment thereof) which,
                                individually or in the aggregate, represent a
                                fundamental change in the information set forth
                                in the Registration Statement. Notwithstanding
                                the foregoing, any increase or decrease in
                                volume of securities offered (if the total
                                dollar value of securities offered would not
                                exceed that which was registered) and any
                                deviation from the low or high end of the
                                estimated maximum offering range may be
                                reflected in the form of prospectus filed with
                                the Securities and Exchange Commission pursuant
                                to Rule 424(b) if, in the aggregate, the changes
                                in volume and price represent no more than a 20
                                percent change in the maximum aggregate offering
                                price set forth in the "Calculation of
                                Registration Fee" table in the effective
                                Registration Statement;

                        (iii)   to include any material information with respect
                                to the plan of distribution not previously
                                disclosed in the Registration Statement or any
                                material change to such information in the
                                Registration Statement.

                (2)     That, for the purpose of determining any liability under
                        the Securities Act of 1933, each such post-effective
                        amendment shall be deemed to be a new registration
                        statement relating to the securities offered therein,
                        and the offering of such securities at that time shall
                        be deemed to be the initial bona fide offering hereof.

                (3)     To remove from registration by means of a post-effective
                        amendment any of the securities being registered which
                        remain unsold at the termination of the offering.

        (b)     The undersigned Registrant hereby further undertakes that, for
                purposes of determining any liability under the Securities Act,
                each filing of the Registrant's annual report pursuant to
                Section 13(a) or Section 15(d) of the Exchange Act (and, where
                applicable, each filing of an employee benefit plan's annual
                report pursuant to Section 15(d) of the Exchange Act) that is
                incorporated by reference in the Registration Statement shall be
                deemed to be a new registration statement relating to the
                securities offered therein, and the offering of such securities
                at that time shall be deemed to be the initial bona fide
                offering thereof.

        (c)     Insofar as indemnification for liabilities arising under the
                Securities Act may be permitted to directors, officers and
                controlling persons of the Registrant pursuant to the foregoing
                provisions, or otherwise, the Registrant has been advised that
                in the opinion of the Securities and Exchange Commission such
                indemnification is against public policy as expressed in the
                Securities Act and is, therefore, unenforceable. In the event
                that a claim for indemnification against such liabilities (other
                than the payment by the Registrant of 

                                      -4-
5
                expenses incurred or paid by a director, officer or controlling
                person of the Registrant in the successful defense of any
                action, suit or proceeding) is asserted by such director,
                officer or controlling person in connection with the securities
                being registered, the Registrant will, unless in the opinion of
                its counsel the matter has been settled by controlling
                precedent, submit to a court of appropriate jurisdiction the
                question whether such indemnification by it is against public
                policy as expressed in the Securities Act and will be governed
                by the final adjudication of such issue.

             [THE REMAINDER OF THIS PAGE LEFT INTENTIONALLY BLANK.]

                                      -5-
6
                                   SIGNATURES

        Pursuant to the requirements of the Securities Act, the Registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-8, and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Santa Clara, State of California, on April 30, 1999.

                                     INTEGRATED DEVICE TECHNOLOGY, INC.

                                     By: /s/ ALAN F. KROCK
                                         ---------------------------------------
                                         Alan F. Krock,
                                         Vice President, Chief Financial Officer

                                POWER OF ATTORNEY

        KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears
below constitutes and appoints Alan Krock and Jack Menache, and each of them,
his or her true and lawful attorneys-in-fact and agents, each with full power of
substitution and resubstitution, for him and in his name, place and stead, in
any and all capacities, to sign any and all amendments, including post-effective
amendments, to this Registration Statement, and to file the same, with exhibits
thereto and other documents in connection therewith, with the Securities and
Exchange Commission granting unto said attorneys-in-fact and agents, and each of
them, full power and authority to do and perform each and every act and thing
requisite and necessary to be done, as fully to all intents and purposes as he
might or could do in person, hereby ratifying and confirming all that said
attorneys-in-fact and agents, or his substitute or substitutes, may do or cause
to be done by virtue hereof.

        Pursuant to the requirements of the Securities Act, this Registration
Statement has been signed by the following persons in the capacities and on the
dates indicated:
Signature                                     Title                                    Date
          ---------                                     -----                                    ----
/s/ D. JOHN CAREY                         Chairman of the Board of Directors                    April 30, 1999
-------------------------------
D. John Carey

/s/ LEONARD C. PERHAM                     Chief Executive Officer and Director                  April 30, 1999
-------------------------------
Leonard C. Perham

/s/ CARL E. BERG                          Director                                              April 30, 1999
-------------------------------
Carl E. Berg

/s/ JOHN C. BOLGER                        Director                                              April 30, 1999
-------------------------------
John C. Bolger

                                          Director                                              
-------------------------------
Federico Faggin
-6-
7
                                INDEX TO EXHIBITS

          Exhibit
           Number                              Exhibit
          -------                              -------

            4.01*       Restated Certificate of Incorporation (previously filed
                        as Exhibit 3A to the Registration Statement on Form 8-B
                        dated September 23, 1987).

            4.02*       Certificate of Amendment of Restated Certificate of
                        Incorporation (previously filed as Exhibit 3(a) to the
                        Registration Statement on Form 8 dated March 28, 1989).

            4.03*       Certificate of Amendment of Restated Certificate of
                        Incorporation (previously filed as Exhibit 4.3 to the
                        Registration Statement on Form S-8 (File Number
                        33-63133) filed on October 2, 1995).

            4.04*       Certificate of Designations specifying the terms of the
                        Series A Junior Participating Preferred Stock of IDT, as
                        filed with the Secretary of State of Delaware on
                        December 22, 1998 (previously filed as Exhibit 3.6 to
                        Registration Statement on Form 8--A filed December 23,
                        1998).

            4.05*       Bylaws of IDT, as amended and restated, effective
                        December 21, 1998 (previously filed as Exhibit 3.1 to
                        Current Report on Form 8-K filed December 23, 1998).

            4.06*       Rights Agreement, dated December 21, 1998, between IDT 
                        and BankBoston, N.A. as Rights Agent (previously filed
                        as Exhibit 4.1 to Registration Statement on Form 8--A
                        filed December 23, 1998).

            4.07*       Form of Indenture between IDT and The First National 
                        Bank of Boston, as Trustee, including Form of Notes
                        (previously filed as Exhibit 4.6 to the S-3 Registration
                        Statement (File number 33-59443).

            4.08        Quality Semiconductor, Inc. 1989 Stock Option Plan

            4.09        Quality Semiconductor, Inc. 1995 Stock Option Plan

            4.10        Quality Semiconductor, Inc. Director's Stock Option Plan

            5.1         Opinion of Fenwick & West LLP, regarding legality of
                        securities to be offered.

            23.1        Consent of PricewaterhouseCoopers LLP, Independent
                        Accountants.

                                      -7-
8
            23.2        Consent of Fenwick & West LLP (included in Exhibit 5.1).

            24.1        Power of Attorney (see page 6).

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*    The exhibits were previously filed with the Commission as indicated and are
     incorporated herein by reference.

                                      -8-