<ARTICLE>  5
<LEGEND>    THE SCHEDULE  CONTAINS  SUMMARY  FINANCIAL  INFORMATION 
            EXTRACTED FROM THE CONSOLIDATED  FINANCIAL  STATEMENTS FOR
            THE QUARTERS ENDED SEPTEMBER 30, 1997, DECEMBER 31, 1997, 
            MARCH 31, 1998 AND IS QUALIFIED IN ITS ENTITERITY BY
            REFERENCE TO SUCH FINANCIAL STATEMENTS.

</LEGEND>
<MULTIPLIER>1000
       
                                                        
<FISCAL-YEAR-END>                        JUN-30-1998 JUN-30-1998 JUN-30-1998
<PERIOD-START>                           JUL-01-1997 JUL-01-1997 JUL-01-1997
<PERIOD-END>                             SEP-30-1997 DEC-31-1997 MAR-31-1998
<PERIOD-TYPE>                            3-MOS       6-MOS       9-MOS
<CASH>                                      33,095      30,849      45,747
<SECURITIES>                                50,527      54,564      46,958
<RECEIVABLES>                               26,421      26,842      32,314
<ALLOWANCES>                                   880         332           0
<INVENTORY>                                 19,853      19,808      20,386
<CURRENT-ASSETS>                           142,810     145,376     158,239
<PP&E>                                      47,470      55,164      46,392
<DEPRECIATION>                              13,544      14,718         482
<TOTAL-ASSETS>                             189,379     198,164     216,060
<CURRENT-LIABILITIES>                       21,852      25,875      30,079
<BONDS>                                          0           0           0
<PREFERRED-MANDATORY>                            0           0           0
<PREFERRED>                                      0           0           0
<COMMON>                                        35          36          36
<OTHER-SE>                                 164,892     169,607     182,785
<TOTAL-LIABILITY-AND-EQUITY>               189,379     198,164     216,060
<SALES>                                     40,022      85,501     133,423
<TOTAL-REVENUES>                            40,022      85,501     133,423
<CGS>                                       20,520      43,762      66,945
<TOTAL-COSTS>                               20,520      43,762      66,945
<OTHER-EXPENSES>                            10,282      28,038      39,628
<LOSS-PROVISION>                                 0           0           0
<INTEREST-EXPENSE>                               0           0           0
<INCOME-PRETAX>                              9,982      15,223      29,122
<INCOME-TAX>                                 3,414       7,393      12,028
<INCOME-CONTINUING>                          6,568       7,830      17,093
<DISCONTINUED>                                   0           0           0
<EXTRAORDINARY>                                  0           0           0
<CHANGES>                                        0           0           0
<NET-INCOME>                                 6,568       7,830      17,093
<EPS-PRIMARY>                                $0.17       $0.20       $0.44
<EPS-DILUTED>                                $0.17       $0.20       $0.44