<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE INCOME
STATEMENT FOR THE SIX-MONTH PERIOD ENDED JUNE 30, 2000, AND THE BALANCE SHEET AS
OF JUNE 30, 2000, AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
<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> 23,018
<SECURITIES> 8,571
<RECEIVABLES> 14,346
<ALLOWANCES> 107
<INVENTORY> 12,388
<CURRENT-ASSETS> 65,077
<PP&E> 26,541
<DEPRECIATION> 16,302
<TOTAL-ASSETS> 82,941
<CURRENT-LIABILITIES> 11,309
<BONDS> 135
0
0
<COMMON> 79
<OTHER-SE> 68,327
<TOTAL-LIABILITY-AND-EQUITY> 82,941
<SALES> 28,122
<TOTAL-REVENUES> 33,078
<CGS> 10,934
<TOTAL-COSTS> 13,122
<OTHER-EXPENSES> 15,325
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 14
<INCOME-PRETAX> 5,363
<INCOME-TAX> 1,716
<INCOME-CONTINUING> 3,647
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 3,647
<EPS-BASIC> 0.47
<EPS-DILUTED> 0.43
</TABLE>