<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM
THE INCOME STATEMENT FOR THE NINE-MONTH PERIOD ENDED SEPTEMBER 30, 2000, AND
THE BALANCE SHEET AS OF SEPTEMBER 30, 2000, AND IS QUALIFIED IN ITS ENTIRETY
BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 9-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> SEP-30-2000
<CASH> 17,357
<SECURITIES> 17,471
<RECEIVABLES> 16,099
<ALLOWANCES> 102
<INVENTORY> 12,477
<CURRENT-ASSETS> 70,177
<PP&E> 27,063
<DEPRECIATION> 17,070
<TOTAL-ASSETS> 87,384
<CURRENT-LIABILITIES> 12,945
<BONDS> 0
0
0
<COMMON> 79
<OTHER-SE> 71,170
<TOTAL-LIABILITY-AND-EQUITY> 87,384
<SALES> 43,599
<TOTAL-REVENUES> 51,026
<CGS> 16,554
<TOTAL-COSTS> 19,800
<OTHER-EXPENSES> 23,813
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 19
<INCOME-PRETAX> 8,544
<INCOME-TAX> 2,734
<INCOME-CONTINUING> 5,810
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 5,810
<EPS-BASIC> 0.74
<EPS-DILUTED> 0.68
</TABLE>