<ARTICLE>  5
<LEGEND>    THE SCHEDULE  CONTAINS  SUMMARY  FINANCIAL  INFORMATION 
            EXTRACTED FROM THE CONSOLIDATED  FINANCIAL  STATEMENTS FOR
            THE PERIOD ENDED JUNE 30, 1998, 1997 AND 1996 AND IS
            QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL
            STATEMENTS.
</LEGEND>
<MULTIPLIER>1000
       
                                                        
<FISCAL-YEAR-END>                        JUN-30-1998 JUN-30-1997 JUN-30-1996
<PERIOD-START>                           JUL-01-1997 JUL-01-1996 JUL-01-1995
<PERIOD-END>                             JUN-30-1998 JUN-30-1997 JUN-30-1996
<PERIOD-TYPE>                            12-MOS      12-MOS      12-MOS
<CASH>                                      39,801      29,186      52,463
<SECURITIES>                                54,831      52,009      43,731
<RECEIVABLES>                               40,963      22,194      16,985
<ALLOWANCES>                                   550       1,877         285
<INVENTORY>                                 20,809      18,668      10,641
<CURRENT-ASSETS>                           165,025     133,715     127,026
<PP&E>                                      74,154      42,981      26,019
<DEPRECIATION>                              17,621      11,730       5,714
<TOTAL-ASSETS>                             269,343     177,579     173,824
<CURRENT-LIABILITIES>                       45,776      25,327      13,583
<BONDS>                                          0           0       6,061
<PREFERRED-MANDATORY>                            0           0           0
<PREFERRED>                                      0           0           0
<COMMON>                                        38          34          32
<OTHER-SE>                                 217,863     149,760     153,189
<TOTAL-LIABILITY-AND-EQUITY>               269,343     177,579     173,824
<SALES>                                    175,801     106,966      69,073
<TOTAL-REVENUES>                           175,801     106,966      69,073
<CGS>                                       92,139      57,411      36,300
<TOTAL-COSTS>                               92,139      57,411      36,300
<OTHER-EXPENSES>                           156,665      65,825      27,344
<LOSS-PROVISION>                                 0         582           0
<INTEREST-EXPENSE>                              69         421          79
<INCOME-PRETAX>                            (69,752)    (13,422)      6,828
<INCOME-TAX>                                11,360       5,432       4,036
<INCOME-CONTINUING>                        (81,112)    (18,854)      2,792
<DISCONTINUED>                                   0           0           0
<EXTRAORDINARY>                                  0           0           0
<CHANGES>                                        0           0           0
<NET-INCOME>                               (81,112)    (18,854)      2,792
<EPS-PRIMARY>                               ($2.34)     ($0.57)      $0.11
<EPS-DILUTED>                               ($2.34)     ($0.57)      $0.10