QUICKLOGIC CORPORATION
SC 13G, 2000-02-14
SEMICONDUCTORS & RELATED DEVICES
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  Schedule 13G
                                 (Rule 13d-102)

        INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES
   13d-1 (b), (c) AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2 (b)
                               (Amendment No.__)*


                             QuickLogic Corporation
- --------------------------------------------------------------------------------
                                (Name of Issuer)


                                  Common Stock
- --------------------------------------------------------------------------------
                         (Title of Class of Securities)


                                    74837P108
- --------------------------------------------------------------------------------
                                 (CUSIP Number)


- --------------------------------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)

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

     [ ]   Rule 13d-1(b)

     [ ]   Rule 13d-1(c)

     [X]   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
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).

                         (Continued on following pages)

                               Page 1 of 18 Pages


<PAGE>


- ------------------------                                ------------------------
CUSIP NO.                             13 G                 Page 2 of 18 Pages
- ------------------------                                ------------------------

- --------------------------------------------------------------------------------
1    NAME OF REPORTING PERSON
     I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

     U.S. Venture Partners IV, L.P. ("USVP IV")
     Tax ID Number:    94-3193188
- --------------------------------------------------------------------------------
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 EACH                       372,937    shares,    except   that
            REPORTING                        Presidio  Management Group IV, L.P.
            PERSON                           ("PMG IV"), the general  partner of
             WITH                            USVP IV, may be deemed to have sole
                                             voting  power with  respect to such
                                             shares, and Bowes, Federman, Krausz
                                             and Young,  the general partners of
                                             PMG  IV,  may  be  deemed  to  have
                                             shared voting power with respect to
                                             such shares.
                                        ----------------------------------------
                                         6   SHARED VOTING POWER

                                             See response to row 5.
                                        ----------------------------------------
                                         7   SOLE DISPOSITIVE POWER

                                             372,937    shares,    except   that
                                             Presidio  Management Group IV, L.P.
                                             ("PMG IV"), the general  partner of
                                             USVP IV, may be deemed to have sole
                                             dispositive  power with  respect to
                                             such shares,  and Bowes,  Federman,
                                             Krausz  and  Young,   the   general
                                             partners  of PMG IV,  may be deemed
                                             to have  shared  dispositive  power
                                             with respect to such shares.
                                        ----------------------------------------
                                         8   SHARED DISPOSITIVE POWER

                                             See response to row 7
- --------------------------------------------------------------------------------
9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
     REPORTING PERSON                                      372,937

- --------------------------------------------------------------------------------
10   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
     EXCLUDES CERTAIN SHARES*                              [ ]
- --------------------------------------------------------------------------------
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9       2.1%

- --------------------------------------------------------------------------------
12   TYPE OF REPORTING PERSON*
                                                           PN
- --------------------------------------------------------------------------------

                     * SEE INSTRUCTIONS BEFORE FILLING OUT!

<PAGE>


- ------------------------                                ------------------------
CUSIP NO.                             13 G                 Page 3 of 18 Pages
- ------------------------                                ------------------------

- --------------------------------------------------------------------------------
1    NAME OF REPORTING PERSON
     I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

     Second Ventures II, L.P. ("SV II")
     Tax ID Number:    94-3200353
- --------------------------------------------------------------------------------
2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

                                                 (a) [ ]  (b) [X]
- --------------------------------------------------------------------------------
3    SEC USE ONLY

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

     Cayman Islands
- --------------------------------------------------------------------------------
           NUMBER OF
             SHARES                     5    SOLE VOTING POWER
          BENEFICIALLY
         OWNED BY EACH                       45,270 shares, except that Presidio
            REPORTING                        Management  Group  IV,  L.P.  ("PMG
            PERSON                           IV"), the general partner of SV II,
             WITH                            may be deemed  to have sole  voting
                                             power with  respect to such shares,
                                             and  Bowes,  Federman,  Krausz  and
                                             Young,  the general partners of PMG
                                             IV,  may be deemed  to have  shared
                                             voting  power with  respect to such
                                             shares.
                                        ----------------------------------------
                                         6   SHARED VOTING POWER

                                             See response to row 5.
                                        ----------------------------------------
                                         7   SOLE DISPOSITIVE POWER

                                             45,270 shares, except that Presidio
                                             Management  Group  IV,  L.P.  ("PMG
                                             IV"), the general partner of SV II,
                                             may  be   deemed   to   have   sole
                                             dispositive  power with  respect to
                                             such shares,  and Bowes,  Federman,
                                             Krausz  and  Young,   the   general
                                             partners  of PMG IV,  may be deemed
                                             to have  shared  dispositive  power
                                             with respect to such shares.
                                        ----------------------------------------
                                         8   SHARED DISPOSITIVE POWER

                                             See response to row 7.
- --------------------------------------------------------------------------------
9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
     REPORTING PERSON                                      45,270

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

- --------------------------------------------------------------------------------
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9       0.3%

- --------------------------------------------------------------------------------
12   TYPE OF REPORTING PERSON*                             PN

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

                     * SEE INSTRUCTIONS BEFORE FILLING OUT!



<PAGE>


- ------------------------                                ------------------------
CUSIP NO.                             13 G                 Page 4 of 18 Pages
- ------------------------                                ------------------------

- --------------------------------------------------------------------------------
1    NAME OF REPORTING PERSON
     I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

     USVP Entrepreneur Partners II, L.P. ("UEP II")
     Tax ID Number:    94-3203198
- --------------------------------------------------------------------------------
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 EACH                       12,934  shares,   except  that  the
            REPORTING                        Presidio  Management Group IV, L.P.
            PERSON                           ("PMG IV"), the general  partner of
             WITH                            UEP II,  may be deemed to have sole
                                             voting  power with  respect to such
                                             shares, and Bowes, Federman, Krausz
                                             and Young,  the general partners of
                                             PMG  IV,  may  be  deemed  to  have
                                             shared voting power with respect to
                                             such shares.
                                        ----------------------------------------
                                         6   SHARED VOTING POWER

                                             See response to row 5.
                                        ----------------------------------------
                                         7   SOLE DISPOSITIVE POWER

                                             12,934  shares,   except  that  the
                                             Presidio  Management Group IV, L.P.
                                             ("PMG IV"), the general  partner of
                                             UEP II,  may be deemed to have sole
                                             dispositive  power with  respect to
                                             such shares,  and Bowes,  Federman,
                                             Krausz  and  Young,   the   general
                                             partners  of PMG IV,  may be deemed
                                             to have  shared  dispositive  power
                                             with respect to such shares.
                                        ----------------------------------------
                                         8   SHARED DISPOSITIVE POWER

                                             See response to row 7.
- --------------------------------------------------------------------------------
9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
     REPORTING PERSON                                      12,934

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

- --------------------------------------------------------------------------------
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9       0.1%

- --------------------------------------------------------------------------------
12   TYPE OF REPORTING PERSON*                             PN

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

                     * SEE INSTRUCTIONS BEFORE FILLING OUT!

<PAGE>


- ------------------------                                ------------------------
CUSIP NO.                             13 G                 Page 5 of 18 Pages
- ------------------------                                ------------------------

- --------------------------------------------------------------------------------
1    NAME OF REPORTING PERSON
     I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

     Presidio Management Group IV, L.P. ("PMG IV")
     Tax ID Number:    94-3193187
- --------------------------------------------------------------------------------
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 EACH                       431,141  shares,  of which  372,937
            REPORTING                        are shares  directly  owned by USVP
            PERSON                           IV,  45,270  are  shares   directly
             WITH                            owned  by  SV  II  and  12,934  are
                                             shares  directly  owned  by UEP II.
                                             PMG IV is the  general  partner  of
                                             USVP IV, SV II and UEP II,  and may
                                             be deemed to have sole voting power
                                             with respect to such shares.
                                        ----------------------------------------
                                         6   SHARED VOTING POWER

                                             See response to row 5.
                                        ----------------------------------------
                                         7   SOLE DISPOSITIVE POWER

                                             431,141  shares,  of which  372,937
                                             are shares  directly  owned by USVP
                                             IV,  45,270  are  shares   directly
                                             owned  by  SV  II  and  12,934  are
                                             shares  directly  owned  by UEP II.
                                             PMG IV is the  general  partner  of
                                             USVP IV, SV II and UEP II,  and may
                                             be deemed to have sole  dispositive
                                             power with respect to such shares.
                                        ----------------------------------------
                                         8   SHARED DISPOSITIVE POWER

                                             See response to row 7.
- --------------------------------------------------------------------------------
9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
     REPORTING PERSON                                     431,141

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

- --------------------------------------------------------------------------------
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9       2.4%

- --------------------------------------------------------------------------------
12   TYPE OF REPORTING PERSON*                             PN

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

                     * SEE INSTRUCTIONS BEFORE FILLING OUT!

<PAGE>


- ------------------------                                ------------------------
CUSIP NO.                             13 G                 Page 6 of 18 Pages
- ------------------------                                ------------------------

- --------------------------------------------------------------------------------
1    NAME OF REPORTING PERSON
     I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

     William K. Bowes, Jr. ("Bowes")
     Tax ID Number:
- --------------------------------------------------------------------------------
2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

                                                 (a) [ ]  (b) [X]
- --------------------------------------------------------------------------------
3    SEC USE ONLY

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

     U.S. Citizen
- --------------------------------------------------------------------------------
             NUMBER OF
              SHARES                    5    SOLE VOTING POWER
           BENEFICIALLY
           OWNED BY EACH                     0 shares.
             REPORTING
              PERSON
               WITH
                                        ----------------------------------------
                                         6   SHARED VOTING POWER

                                             431,141  shares,  of which  372,937
                                             are shares  directly  owned by USVP
                                             IV,  45,270  are  shares   directly
                                             owned  by  SV  II  and  12,934  are
                                             shares  directly  owned  by UEP II.
                                             Bowes is a general  partner  of PMG
                                             IV, the general partner of USVP IV,
                                             SV II and UEP II, and may be deemed
                                             to have  shared  voting  power with
                                             respect to such shares.
                                        ----------------------------------------
                                         7   SOLE DISPOSITIVE POWER

                                             0 shares.
                                        ----------------------------------------

                                         8   SHARED DISPOSITIVE POWER

                                             431,141  shares,  of which  372,937
                                             are shares  directly  owned by USVP
                                             IV,  45,270  are  shares   directly
                                             owned  by  SV  II  and  12,934  are
                                             shares  directly  owned  by UEP II.
                                             Bowes is a general  partner  of PMG
                                             IV, the general partner of USVP IV,
                                             SV II and UEP II, and may be deemed
                                             to have  shared  dispositive  power
                                             with respect to such shares.
- --------------------------------------------------------------------------------
9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
     REPORTING PERSON                                     431,141

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

- --------------------------------------------------------------------------------
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9       2.4%

- --------------------------------------------------------------------------------
12   TYPE OF REPORTING PERSON*                             IN

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

                     * SEE INSTRUCTIONS BEFORE FILLING OUT!

<PAGE>


- ------------------------                                ------------------------
CUSIP NO.                             13 G                 Page 7 of 18 Pages
- ------------------------                                ------------------------

- --------------------------------------------------------------------------------
1    NAME OF REPORTING PERSON
     I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

     Irwin Federman ("Federman")
     Tax ID Number:
- --------------------------------------------------------------------------------
2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

                                                 (a) [ ]  (b) [X]
- --------------------------------------------------------------------------------
3    SEC USE ONLY

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

                      U.S. Citizen
- --------------------------------------------------------------------------------
             NUMBER OF
              SHARES                     5   SOLE VOTING POWER
           BENEFICIALLY
           OWNED BY EACH                     0 shares.
             REPORTING
              PERSON
               WITH
                                        ----------------------------------------
                                         6   SHARED VOTING POWER

                                             431,141  shares,  of which  372,937
                                             are shares  directly  owned by USVP
                                             IV,  45,270  are  shares   directly
                                             owned  by  SV  II  and  12,934  are
                                             shares  directly  owned  by UEP II.
                                             Federman  is a general  partner  of
                                             PMG IV, the general partner of USVP
                                             IV,  SV II and UEP  II,  and may be
                                             deemed to have shared  voting power
                                             with respect to such shares.
                                        ----------------------------------------
                                         7   SOLE DISPOSITIVE POWER

                                             0 shares.
                                        ----------------------------------------
                                         8   SHARED DISPOSITIVE POWER

                                             431,141  shares,  of which  372,937
                                             are shares  directly  owned by USVP
                                             IV,  45,270  are  shares   directly
                                             owned  by  SV  II  and  12,934  are
                                             shares  directly  owned  by UEP II.
                                             Federman  is a general  partner  of
                                             PMG IV, the general partner of USVP
                                             IV,  SV II and UEP  II,  and may be
                                             deemed to have  shared  dispositive
                                             power with respect to such shares.
- --------------------------------------------------------------------------------
9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
     REPORTING PERSON                                     431,141

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

- --------------------------------------------------------------------------------
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9       2.4%

- --------------------------------------------------------------------------------
12   TYPE OF REPORTING PERSON*                             IN

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

                     * SEE INSTRUCTIONS BEFORE FILLING OUT!

<PAGE>


- ------------------------                                ------------------------
CUSIP NO.                             13 G                 Page 8 of 18 Pages
- ------------------------                                ------------------------

- --------------------------------------------------------------------------------
1    NAME OF REPORTING PERSON
     I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

     Steven M. Krausz ("Krausz")
     Tax ID Number:
- --------------------------------------------------------------------------------
2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

                                                 (a) [ ]  (b) [X]
- --------------------------------------------------------------------------------
3    SEC USE ONLY

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

     U.S. Citizen
- --------------------------------------------------------------------------------
             NUMBER OF
              SHARES                     5   SOLE VOTING POWER
           BENEFICIALLY
           OWNED BY EACH                      0 shares.
             REPORTING
              PERSON
               WITH
                                        ----------------------------------------
                                         6   SHARED VOTING POWER

                                             431,141  shares,  of which  372,937
                                             are shares  directly  owned by USVP
                                             IV,  45,270  are  shares   directly
                                             owned  by  SV  II  and  12,934  are
                                             shares  directly  owned  by UEP II.
                                             Krausz is a general  partner of PMG
                                             IV, the general partner of USVP IV,
                                             SV II and UEP II, and may be deemed
                                             to have  shared  voting  power with
                                             respect to such shares.
                                        ----------------------------------------
                                         7   SOLE DISPOSITIVE POWER

                                             0 shares.
                                        ----------------------------------------
                                         8   SHARED DISPOSITIVE POWER
                                             431,141  shares,  of which  372,937
                                             are shares  directly  owned by USVP
                                             IV,  45,270  are  shares   directly
                                             owned  by  SV  II  and  12,934  are
                                             shares  directly  owned  by UEP II.
                                             Krausz is a general  partner of PMG
                                             IV, the general partner of USVP IV,
                                             SV II and UEP II, and may be deemed
                                             to have  shared  dispositive  power
                                             with respect to such shares.
- --------------------------------------------------------------------------------
9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
     REPORTING PERSON                                     431,141

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

- --------------------------------------------------------------------------------
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9       2.4%

- --------------------------------------------------------------------------------
12   TYPE OF REPORTING PERSON*                             IN

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

                     * SEE INSTRUCTIONS BEFORE FILLING OUT!

<PAGE>


- ------------------------                                ------------------------
CUSIP NO.                             13 G                 Page 9 of 18 Pages
- ------------------------                                ------------------------

- --------------------------------------------------------------------------------
1    NAME OF REPORTING PERSON
     I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

     Philip M. Young ("Young")
     Tax ID Number:
- --------------------------------------------------------------------------------
2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

                                                 (a) [ ]  (b) [X]
- --------------------------------------------------------------------------------
3    SEC USE ONLY

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

     U.S. Citizen
- --------------------------------------------------------------------------------
             NUMBER OF
              SHARES                     5   SOLE VOTING POWER
           BENEFICIALLY
           OWNED BY EACH                      0 shares.
             REPORTING
              PERSON
               WITH
                                        ----------------------------------------
                                         6   SHARED VOTING POWER

                                             431,141  shares,  of which  372,937
                                             are shares  directly  owned by USVP
                                             IV,  45,270  are  shares   directly
                                             owned  by  SV  II  and  12,934  are
                                             shares  directly  owned  by UEP II.
                                             Young is a general  partner  of PMG
                                             IV, the general partner of USVP IV,
                                             SV II and UEP II, and may be deemed
                                             to have  shared  voting  power with
                                             respect to such shares.
                                        ----------------------------------------
                                         7   SOLE DISPOSITIVE POWER

                                             0 shares.
                                        ----------------------------------------
                                         8   SHARED DISPOSITIVE POWER
                                             431,141  shares,  of which  372,937
                                             are shares  directly  owned by USVP
                                             IV,  45,270  are  shares   directly
                                             owned  by  SV  II  and  12,934  are
                                             shares  directly  owned  by UEP II.
                                             Young is a general  partner  of PMG
                                             IV, the general partner of USVP IV,
                                             SV II and UEP II, and may be deemed
                                             to have  shared  dispositive  power
                                             with respect to such shares.
- --------------------------------------------------------------------------------
9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
     REPORTING PERSON                                     431,141

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

- --------------------------------------------------------------------------------
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9       2.4%

- --------------------------------------------------------------------------------
12   TYPE OF REPORTING PERSON*                             IN

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

                     * SEE INSTRUCTIONS BEFORE FILLING OUT!

<PAGE>


                                                             Page 10 of 18 Pages


ITEM 1(a).     NAME OF ISSUER:

               QuickLogic Corporation


ITEM 1(b).     ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:

               1277 Orleans Drive
               Sunnyvale, CA  94089


ITEM 2(a).     NAME OF PERSON FILING:

               This statement is filed by U.S.  Venture Partners IV, L.P. ("USVP
               IV"),  Second  Ventures  II, L.P.  ("SV II"),  USVP  Entrepreneur
               Partners II, L.P. ("UEP II"),  Presidio Management Group IV, L.P.
               ("PMG  IV"),  William K. Bowes,  Jr.  ("Bowes"),  Irwin  Federman
               ("Federman"),  Steven M.  Krausz  ("Krausz")  and Philip M. Young
               ("Young").   The   foregoing   entities   and   individuals   are
               collectively referred to as the "Reporting Persons".

               PMG IV is the  general  partner of USVP IV, SV II and UEP II, and
               may be  deemed  to have  sole  power to vote  and  sole  power to
               dispose of shares of the issuer  directly owned by USVP IV, SV II
               and UEP II.  Bowes,  Federman,  Krausz and Young are the  general
               partners  of PMG IV,  and may be deemed to have  shared  power to
               vote and shared power to dispose of the shares of issuer directly
               owned by USVP IV, SV II and UEP II.


ITEM 2(b).     ADDRESS OF PRINCIPAL BUSINESS OFFICE, OR, IF NONE, RESIDENCE:

               The  address  of the  principal  business  office for each of the
               Reporting Persons is:

               U.S. Venture Partners
               2180 Sand Hill Road, Suite 300
               Menlo Park, CA  94025


ITEM 2(c)      CITIZENSHIP:

               USVP IV, UEP II and PMG IV are Delaware Limited Partnerships,  SV
               II is a Cayman Island Limited  Partnership  and Bowes,  Federman,
               Krausz and Young are United States citizens.


ITEM 2(d).     TITLE OF CLASS OF SECURITIES:

               Common Stock


ITEM 2(e).     CUSIP NUMBER:

               74837P108


ITEM 3.        Not Applicable


<PAGE>


                                                             Page 11 of 18 Pages


ITEM 4.        OWNERSHIP:

               The  following  information  with respect to the ownership of the
               Common Stock of the issuer by the persons  filing this  Statement
               is provided as of December 31, 1999:

                  (a)    Amount beneficially owned:

                         See Row 9 of cover page for each Reporting Person.

                  (b)    Percent of Class:

                         See Row 11 of cover page for each Reporting Person.

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

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

                                   See Row 5 of cover  page  for each  Reporting
                                   Person.

                            (ii)   Shared power to vote or to direct the vote:

                                   See Row 6 of cover  page  for each  Reporting
                                   Person.

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

                                   See Row 7 of cover  page  for each  Reporting
                                   Person.

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

                                   See Row 8 of cover  page  for each  Reporting
                                   Person.


<PAGE>


                                                             Page 12 of 18 Pages


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

               Not applicable


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

               Under certain  circumstances set forth in the limited partnership
               agreements  of USVP IV, SV II, UEP II and PMG IV, the general and
               limited  partners of each of such  entities may be deemed to have
               the right to receive  dividends  from, or the proceeds  from, the
               sale of shares of the issuer  owned by each such  entity of which
               they are a partner.


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:

               Not applicable


<PAGE>


                                                             Page 13 of 18 Pages


                                   SIGNATURES

         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 31, 2000


U.S. Venture Partners IV, L.P.                   _______________________________
By Presidio Management Group IV, L.P.            Signature
Its General Partner
                                                 Michael P. Maher
                                                 Chief Financial Officer/
                                                 Attorney-In-Fact


Second Ventures II, L.P.                         _______________________________
By Presidio Management Group IV, L.P.            Signature
Its General Partner
                                                 Michael P. Maher
                                                 Chief Financial Officer/
                                                 Attorney-In-Fact


U.S.V.P. Entrepreneur Partners II, L.P.          _______________________________
By Presidio Management Group IV, L.P.            Signature
Its General Partner
                                                 Michael P. Maher
                                                 Chief Financial Officer/
                                                 Attorney-In-Fact


Presidio Management Group IV, L.P.               _______________________________
A Delaware Limited Partnership                   Signature

                                                 Michael P. Maher
                                                 Chief Financial Officer/
                                                 Attorney-In-Fact


William K. Bowes, Jr.                            _______________________________
                                                 Michael P. Maher
                                                 Attorney-In-Fact

Irwin Federman                                   _______________________________
                                                 Michael P. Maher
                                                 Attorney-In-Fact



<PAGE>


                                                             Page 14 of 18 Pages


Steven M. Krausz                                 _______________________________
                                                 Michael P. Maher
                                                 Attorney-In-Fact


Philip M. Young                                  _______________________________
                                                 Michael P. Maher
                                                 Attorney-In-Fact


<PAGE>


                                                             Page 15 of 18 Pages


                                  EXHIBIT INDEX

                                                                     Found on
                                                                   Sequentially
Exhibit                                                           Numbered Pages
- -------                                                           --------------
Exhibit A: Agreement of Joint Filing                                    17
Exhibit B: Reference to Michael P. Maher as Attorney-In-Fact            19





<PAGE>


                                                             Page 16 of 18 Pages


                                    EXHIBIT A

                            Agreement of Joint Filing

         The  undersigned  hereby  agree  that a  single  Schedule  13G  (or any
amendment thereto) relating to the Common Stock of QuickLogic  Corporation shall
be filed on behalf of each of the  undersigned  and that this Agreement shall be
filed as an exhibit to such Schedule 13G.

Dated: January 31, 2000


U.S. Venture Partners IV, L.P.                   _______________________________
By Presidio Management Group IV, L.P.            Signature
Its General Partner
                                                 Michael P. Maher
                                                 Chief Financial Officer/
                                                 Attorney-In-Fact


Second Ventures II, L.P.                         _______________________________
By Presidio Management Group IV, L.P.            Signature
Its General Partner
                                                 Michael P. Maher
                                                 Chief Financial Officer/
                                                 Attorney-In-Fact


U.S.V.P. Entrepreneur Partners II, L.P.          _______________________________
By Presidio Management Group IV, L.P.            Signature
Its General Partner
                                                 Michael P. Maher
                                                 Chief Financial Officer/
                                                 Attorney-In-Fact


Presidio Management Group IV, L.P.               _______________________________
A Delaware Limited Partnership                   Signature

                                                 Michael P. Maher
                                                 Chief Financial Officer/
                                                 Attorney-In-Fact


William K. Bowes, Jr.                            _______________________________
                                                 Michael P. Maher
                                                 Attorney-In-Fact



<PAGE>


                                                             Page 17 of 18 Pages


Irwin Federman                                   _______________________________
                                                 Michael P. Maher
                                                 Attorney-In-Fact


Steven M. Krausz                                 _______________________________
                                                 Michael P. Maher
                                                 Attorney-In-Fact


Philip M. Young                                  _______________________________
                                                 Michael P. Maher
                                                 Attorney-In-Fact


<PAGE>


                                                             Page 18 of 18 Pages


                                    EXHIBIT B

                 REFERENCE TO MICHAEL MAHER AS ATTORNEY-IN-FACT

Michael P. Maher has signed the  enclosed  documents as  Attorney-In-Fact.  Note
that copies of the  applicable  Power of Attorneys  are already on file with the
appropriate agencies.







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