<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM FINANCIAL
STATEMENTS FOR THE SIX MONTHS ENDED SEPTEMBER 30, 2000 AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          MAR-31-2001
<PERIOD-START>                             APR-01-2000
<PERIOD-END>                               SEP-30-2000
<CASH>                                          51,632
<SECURITIES>                                    64,894
<RECEIVABLES>                                  101,922
<ALLOWANCES>                                   (3,414)
<INVENTORY>                                     73,263
<CURRENT-ASSETS>                               317,988
<PP&E>                                          65,419
<DEPRECIATION>                                (34,333)
<TOTAL-ASSETS>                                 389,282
<CURRENT-LIABILITIES>                          112,270
<BONDS>                                              0
                                0
                                          0
<COMMON>                                       248,466
<OTHER-SE>                                      25,371
<TOTAL-LIABILITY-AND-EQUITY>                   389,282
<SALES>                                        250,593
<TOTAL-REVENUES>                               250,593
<CGS>                                          135,062
<TOTAL-COSTS>                                   68,075
<OTHER-EXPENSES>                               (2,959)
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 279
<INCOME-PRETAX>                                 50,415
<INCOME-TAX>                                    17,556
<INCOME-CONTINUING>                             32,859
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    32,859
<EPS-BASIC>                                       1.02
<EPS-DILUTED>                                     0.94


</TABLE>



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