<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-2001
<PERIOD-START> JUL-01-2000
<PERIOD-END> SEP-30-2000
<CASH> 34,612
<SECURITIES> 48,110
<RECEIVABLES> 130,866
<ALLOWANCES> 4,361
<INVENTORY> 87,202
<CURRENT-ASSETS> 308,855
<PP&E> 123,066
<DEPRECIATION> 75,670
<TOTAL-ASSETS> 371,384
<CURRENT-LIABILITIES> 87,160
<BONDS> 0
0
0
<COMMON> 735
<OTHER-SE> 283,489
<TOTAL-LIABILITY-AND-EQUITY> 371,384
<SALES> 192,167
<TOTAL-REVENUES> 192,167
<CGS> 128,333
<TOTAL-COSTS> 128,333
<OTHER-EXPENSES> 42,637
<LOSS-PROVISION> 427
<INTEREST-EXPENSE> 29
<INCOME-PRETAX> 23,783
<INCOME-TAX> 3,568
<INCOME-CONTINUING> 20,215
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 20,215
<EPS-BASIC> 0.28
<EPS-DILUTED> 0.26
</TABLE>