<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<MULTIPLIER> 1,000
<S> <C> <C>
<PERIOD-TYPE> 3-MOS 6-MOS
<FISCAL-YEAR-END> DEC-31-2000 DEC-31-2000
<PERIOD-START> APR-01-2000 JAN-01-2000
<PERIOD-END> JUN-30-2000 JUN-30-2000
<CASH> 40,474 40,474
<SECURITIES> 119,082 119,082
<RECEIVABLES> 17,705 17,705
<ALLOWANCES> 476 476
<INVENTORY> 12,425 12,425
<CURRENT-ASSETS> 112,294 112,294
<PP&E> 21,993 21,993
<DEPRECIATION> 12,017 12,017
<TOTAL-ASSETS> 199,958 199,958
<CURRENT-LIABILITIES> 12,237 12,237
<BONDS> 0 0
0 0
0 0
<COMMON> 41 41
<OTHER-SE> 187,501 187,501
<TOTAL-LIABILITY-AND-EQUITY> 199,958 199,958
<SALES> 34,072 61,432
<TOTAL-REVENUES> 34,072 61,432
<CGS> 10,412 19,190
<TOTAL-COSTS> 11,382 20,993
<OTHER-EXPENSES> 1,163 1,163
<LOSS-PROVISION> 0 0
<INTEREST-EXPENSE> 0 0
<INCOME-PRETAX> 12,854 23,247
<INCOME-TAX> 4,905 8,820
<INCOME-CONTINUING> 7,949 14,427
<DISCONTINUED> 0 0
<EXTRAORDINARY> 0 0
<CHANGES> 0 0
<NET-INCOME> 7,949 14,427
<EPS-BASIC> $0.20 $0.36
<EPS-DILUTED> $0.18 $0.33
</TABLE>