<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>                                      40,525      29,727      52,853
<SECURITIES>                                54,831      52,009      43,731
<RECEIVABLES>                               42,731      23,640      17,665
<ALLOWANCES>                                   809       1,877         285
<INVENTORY>                                 22,137      19,296      11,049
<CURRENT-ASSETS>                           168,595     133,715     128,510
<PP&E>                                      75,341      43,879      26,725
<DEPRECIATION>                              18,150      12,178       6,036
<TOTAL-ASSETS>                             273,571     180,653     175,692
<CURRENT-LIABILITIES>                       47,167      26,142      13,819
<BONDS>                                          0           0       6,061
<PREFERRED-MANDATORY>                            0           0           0
<PREFERRED>                                      0           0           0
<COMMON>                                        39          35          33
<OTHER-SE>                                 220,699     151,998     154,791
<TOTAL-LIABILITY-AND-EQUITY>               273,571     180,653     175,692
<SALES>                                    185,215     106,966      73,701
<TOTAL-REVENUES>                           185,215     113,214      73,701
<CGS>                                       96,130      60,001      38,287
<TOTAL-COSTS>                               96,130      60,001      38,287
<OTHER-EXPENSES>                           159,906      68,416      29,565
<LOSS-PROVISION>                                 0         582           0
<INTEREST-EXPENSE>                              69         421          79
<INCOME-PRETAX>                            (67,570)    (12,355)      7,248
<INCOME-TAX>                                11,360       5,432       4,036
<INCOME-CONTINUING>                        (78,930)    (17,787)      3,212
<DISCONTINUED>                                   0           0           0
<EXTRAORDINARY>                                  0           0           0
<CHANGES>                                        0           0           0
<NET-INCOME>                               (78,930)    (17,787)      3,212
<EPS-PRIMARY>                               ($2.23)     ($0.53)      $0.13
<EPS-DILUTED>                               ($2.23)     ($0.53)      $0.12