<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> JUN-30-2000
<CASH> 55,197
<SECURITIES> 8,294
<RECEIVABLES> 60,187
<ALLOWANCES> 1,689
<INVENTORY> 26,218
<CURRENT-ASSETS> 171,089
<PP&E> 28,992
<DEPRECIATION> 14,905
<TOTAL-ASSETS> 220,352
<CURRENT-LIABILITIES> 65,139
<BONDS> 0
0
0
<COMMON> 18
<OTHER-SE> 155,195
<TOTAL-LIABILITY-AND-EQUITY> 220,352
<SALES> 144,783
<TOTAL-REVENUES> 144,783
<CGS> 63,907
<TOTAL-COSTS> 63,907
<OTHER-EXPENSES> 45,773<F1>
<LOSS-PROVISION> 439
<INTEREST-EXPENSE> 0
<INCOME-PRETAX> 34,664
<INCOME-TAX> 11,434
<INCOME-CONTINUING> 23,230
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 23,230
<EPS-BASIC> 0.67
<EPS-DILUTED> 0.61
<FN>
<F1>Includes litigation reserve release of $1,843K and $1,633K of interest income.
</FN>
</TABLE>