<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<RESTATED>
<MULTIPLIER> 1,000
<S> <C> <C>
<PERIOD-TYPE> 9-MOS 9-MOS
<FISCAL-YEAR-END> SEP-30-2000 SEP-30-1999
<PERIOD-START> OCT-01-1999 OCT-01-1998
<PERIOD-END> JUN-30-2000 JUN-30-1999
<CASH> 322,409 89,941
<SECURITIES> 134,240 110,245
<RECEIVABLES> 107,550 72,580
<ALLOWANCES> 7,015 3,500
<INVENTORY> 37,532 26,931
<CURRENT-ASSETS> 653,870 334,515
<PP&E> 190,922 134,465
<DEPRECIATION> 72,885 52,616
<TOTAL-ASSETS> 1,834,973 543,069
<CURRENT-LIABILITIES> 38,009 39,052
<BONDS> 0 0
0 0
0 0
<COMMON> 1,795 1,709
<OTHER-SE> 1,069,411 500,672
<TOTAL-LIABILITY-AND-EQUITY> 1,834,973 543,069
<SALES> 303,679 200,982
<TOTAL-REVENUES> 303,679 200,982
<CGS> 105,697 75,908
<TOTAL-COSTS> 273,016 147,658
<OTHER-EXPENSES> 0 0
<LOSS-PROVISION> 0 0
<INTEREST-EXPENSE> 9,840 102
<INCOME-PRETAX> 44,413 61,610
<INCOME-TAX> 28,113 19,830
<INCOME-CONTINUING> 16,300 41,780
<DISCONTINUED> 0 0
<EXTRAORDINARY> 0 0
<CHANGES> 0 0
<NET-INCOME> 16,300 41,780
<EPS-BASIC> 0.09 0.26
<EPS-DILUTED> 0.09 0.24
</TABLE>