<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM CONSOLIDATED
BALANCE SHEET AND CONSOLIDATED STATEMENT OF INCOME AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> MAR-31-2000
<PERIOD-START> APR-01-1999
<PERIOD-END> MAR-31-2000
<CASH> 48,515
<SECURITIES> 21,807
<RECEIVABLES> 11,144
<ALLOWANCES> 754
<INVENTORY> 3,131
<CURRENT-ASSETS> 90,492
<PP&E> 12,603
<DEPRECIATION> 6,946
<TOTAL-ASSETS> 96,748
<CURRENT-LIABILITIES> 15,626
<BONDS> 0
0
0
<COMMON> 31
<OTHER-SE> 41,424
<TOTAL-LIABILITY-AND-EQUITY> 96,748
<SALES> 57,206
<TOTAL-REVENUES> 86,159
<CGS> 21,139
<TOTAL-COSTS> 22,857
<OTHER-EXPENSES> 42,102
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 31
<INCOME-PRETAX> 21,200
<INCOME-TAX> 8,539
<INCOME-CONTINUING> 15,212
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 15,212
<EPS-BASIC> 0.70
<EPS-DILUTED> 0.56
</TABLE>