<ARTICLE>      5 
<LEGEND>       THE SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION
               EXTRACTED FROM CONDENSED CONSOLIDATED BALANCE SHEETS,
               CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND
               NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
               AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
               FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000 
       
                                                      
<PERIOD-TYPE>                         3-MOS                 6-MOS
<FISCAL-YEAR-END>                     JUN-30-1999           JUN-30-1999
<PERIOD-START>                        JUL-01-1998           JUL-01-1998
<PERIOD-END>                          SEP-30-1998           DEC-31-1998
<CASH>                                   31,479                29,331
<SECURITIES>                             75,627                84,905
<RECEIVABLES>                            40,841                40,729
<ALLOWANCES>                                809                   871
<INVENTORY>                              24,207                26,180
<CURRENT-ASSETS>                        179,384               189,555
<PP&E>                                   87,789                95,804
<DEPRECIATION>                           22,543                23,071
<TOTAL-ASSETS>                          295,766               312,209
<CURRENT-LIABILITIES>                    46,163                46,163
<BONDS>                                       0                     0
<PREFERRED-MANDATORY>                         0                     0
<PREFERRED>                                   0                     0
<COMMON>                                     39                    40
<OTHER-SE>                              247,028               258,940
<TOTAL-LIABILITY-AND-EQUITY>            295,766               312,209
<SALES>                                  57,420               121,192
<TOTAL-REVENUES>                         57,420               121,192
<CGS>                                    28,898                62,436
<TOTAL-COSTS>                            28,898                62,436
<OTHER-EXPENSES>                         14,501                36,838
<LOSS-PROVISION>                              0                     0
<INTEREST-EXPENSE>                            0                     0
<INCOME-PRETAX>                          14,940                23,681
<INCOME-TAX>                              4,675                 8,898
<INCOME-CONTINUING>                      10,265                14,783
<DISCONTINUED>                                0                     0
<EXTRAORDINARY>                               0                     0
<CHANGES>                                     0                     0
<NET-INCOME>                             10,265                14,783
<EPS-PRIMARY>                             $0.26                 $0.38
<EPS-DILUTED>                             $0.24                 $0.35