
<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 5
<MULTIPLIER> 1,000
       
<S>                                         <C>
<PERIOD-TYPE>                                   9-MOS
<FISCAL-YEAR-END>                         JUN-30-1995
<PERIOD-START>                            JUL-01-1994
<PERIOD-END>                              MAR-31-1995
<CASH>                                         38,812
<SECURITIES>                                   19,971
<RECEIVABLES>                                  27,194
<ALLOWANCES>                                        0
<INVENTORY>                                    26,298
<CURRENT-ASSETS>                              113,214
<PP&E>                                        128,910
<DEPRECIATION>                                 57,026
<TOTAL-ASSETS>                                220,488
<CURRENT-LIABILITIES>                          15,190
<BONDS>                                         6,100
<COMMON>                                          194
<PREFERRED-MANDATORY>                               0
<PREFERRED>                                         0
<OTHER-SE>                                    178,647
<TOTAL-LIABILITY-AND-EQUITY>                  220,488
<SALES>                                       104,093
<TOTAL-REVENUES>                              104,434
<CGS>                                          74,826
<TOTAL-COSTS>                                  89,674
<OTHER-EXPENSES>                                    0
<LOSS-PROVISION>                                    0
<INTEREST-EXPENSE>                                650
<INCOME-PRETAX>                                19,570
<INCOME-TAX>                                    5,690
<INCOME-CONTINUING>                            14,118
<DISCONTINUED>                                      0
<EXTRAORDINARY>                                     0
<CHANGES>                                           0
<NET-INCOME>                                   14,118
<EPS-PRIMARY>                                     .74
<EPS-DILUTED>                                     .74
        

</TABLE>
