<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 3 AND 4 OF THE COMPANY'S FORM 10-Q FOR THE YEAR-TO-DATE 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> SEP-30-2000
<PERIOD-START> OCT-01-1999
<PERIOD-END> JUN-30-2000
<CASH> 66,755
<SECURITIES> 17,738
<RECEIVABLES> 32,645
<ALLOWANCES> 537
<INVENTORY> 25,698
<CURRENT-ASSETS> 152,382
<PP&E> 27,073
<DEPRECIATION> 16,714
<TOTAL-ASSETS> 163,296
<CURRENT-LIABILITIES> 39,823
<BONDS> 0
0
0
<COMMON> 608
<OTHER-SE> 122,865
<TOTAL-LIABILITY-AND-EQUITY> 163,296
<SALES> 103,171
<TOTAL-REVENUES> 103,171
<CGS> 56,584
<TOTAL-COSTS> 56,584
<OTHER-EXPENSES> 0
<LOSS-PROVISION> 215
<INTEREST-EXPENSE> 43
<INCOME-PRETAX> 12,267
<INCOME-TAX> 753
<INCOME-CONTINUING> 11,514
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 11,514
<EPS-BASIC> .78
<EPS-DILUTED> .72
</TABLE>