<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<RESTATED>
<MULTIPLIER> 1,000
<S> <C> <C>
<PERIOD-TYPE> YEAR YEAR
<FISCAL-YEAR-END> SEP-30-2000 SEP-30-1999
<PERIOD-START> OCT-01-1999 OCT-01-1998
<PERIOD-END> SEP-30-2000 SEP-30-1999
<CASH> 257,081 89,941
<SECURITIES> 442,475 110,245
<RECEIVABLES> 123,297 72,580
<ALLOWANCES> 10,125 3,500
<INVENTORY> 43,715 26,931
<CURRENT-ASSETS> 877,142 334,515
<PP&E> 216,509 134,465
<DEPRECIATION> 74,635 52,616
<TOTAL-ASSETS> 1,901,066 543,069
<CURRENT-LIABILITIES> 70,571 39,052
<BONDS> 0 0
0 0
0 0
<COMMON> 1,801 1,709
<OTHER-SE> 1,103,601 500,672
<TOTAL-LIABILITY-AND-EQUITY> 1,901,066 543,069
<SALES> 441,694 281,669
<TOTAL-REVENUES> 441,694 281,669
<CGS> 150,803 104,815
<TOTAL-COSTS> 380,892 202,215
<OTHER-EXPENSES> 0 0
<LOSS-PROVISION> 0 0
<INTEREST-EXPENSE> 18,548 125
<INCOME-PRETAX> 81,678 90,443
<INCOME-TAX> 53,789 29,292
<INCOME-CONTINUING> 27,889 61,151
<DISCONTINUED> 0 0
<EXTRAORDINARY> 0 0
<CHANGES> 0 0
<NET-INCOME> 27,889 61,151
<EPS-BASIC> 0.16 0.37
<EPS-DILUTED> 0.15 0.34
</TABLE>