<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED BALANCE SHEET AND CONSOLIDATED STATEMENT OF OPERATIONS FOUND ON
PAGES 31 AND 32 OF THE COMPANY'S FORM 10-K FOR THE YEAR AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> SEP-30-2000
<PERIOD-START> OCT-01-1999
<PERIOD-END> SEP-30-2000
<CASH> 18,737
<SECURITIES> 48,813
<RECEIVABLES> 42,326
<ALLOWANCES> 591
<INVENTORY> 30,382
<CURRENT-ASSETS> 153,155
<PP&E> 30,232
<DEPRECIATION> 18,010
<TOTAL-ASSETS> 190,038
<CURRENT-LIABILITIES> 49,425
<BONDS> 0
0
0
<COMMON> 17
<OTHER-SE> 140,596
<TOTAL-LIABILITY-AND-EQUITY> 190,038
<SALES> 155,833
<TOTAL-REVENUES> 155,833
<CGS> 84,463
<TOTAL-COSTS> 84,463
<OTHER-EXPENSES> 57,733
<LOSS-PROVISION> 255
<INTEREST-EXPENSE> 90
<INCOME-PRETAX> 16,032
<INCOME-TAX> 1,651
<INCOME-CONTINUING> 0
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 14,381
<EPS-BASIC> 0.94
<EPS-DILUTED> 0.88
</TABLE>