<DOCUMENT>
<TYPE>EX-21
<SEQUENCE>3
<FILENAME>a2068073zex-21.txt
<DESCRIPTION>EXHIBIT 21
<TEXT>
<Page>

                                                                      Exhibit 21

                           SUBSIDIARIES OF THE COMPANY

The following is a list of the Company's subsidiaries:

<Table>
<Caption>
                                                                                     Percentage Of Voting
                                                                                      Securities Owned By
                                                            Organized                   Registrant As Of
                                                           Under Law Of                December 29, 2001
                                                    --------------------------    -----------------------------
<S>                                                 <C>                                <C>
Silicon Laboratories UK Ltd.                        United Kingdom                            100%
Silicon Laboratories Isolation, Inc.                State of California                       100%
Silicon Laboratories K.K.                           Japan                                     100%
</Table>

</TEXT>
</DOCUMENT>