<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM FINANCIAL
STATEMENTS FOR THE SIX MONTHS ENDED SEPTEMBER 30, 1998 AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          MAR-31-1999
<PERIOD-START>                             APR-01-1998
<PERIOD-END>                               SEP-30-1998
<CASH>                                           8,129
<SECURITIES>                                    39,861
<RECEIVABLES>                                   14,720
<ALLOWANCES>                                     1,983
<INVENTORY>                                     22,486
<CURRENT-ASSETS>                               100,946
<PP&E>                                          26,021
<DEPRECIATION>                                  13,784
<TOTAL-ASSETS>                                 133,314
<CURRENT-LIABILITIES>                           22,704
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                       107,745
<OTHER-SE>                                       2,865
<TOTAL-LIABILITY-AND-EQUITY>                   133,314
<SALES>                                         50,036
<TOTAL-REVENUES>                                50,036
<CGS>                                           30,689
<TOTAL-COSTS>                                   30,689
<OTHER-EXPENSES>                                20,898
<LOSS-PROVISION>                                 2,922
<INTEREST-EXPENSE>                                  17
<INCOME-PRETAX>                                (17,562)
<INCOME-TAX>                                    (5,971)
<INCOME-CONTINUING>                            (11,591)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   (11,591)
<EPS-PRIMARY>                                    (0.98)
<EPS-DILUTED>                                    (0.98)