<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED FINANCIAL STATEMENTS FOR THE SIX MONTHS ENDED SEPTEMBER, 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> MAR-31-2001
<PERIOD-START> APR-01-2000
<PERIOD-END> SEP-30-2000
<CASH> 54,347
<SECURITIES> 0
<RECEIVABLES> 3,214
<ALLOWANCES> 180
<INVENTORY> 2,898
<CURRENT-ASSETS> 61,955
<PP&E> 2,586
<DEPRECIATION> 2,115
<TOTAL-ASSETS> 62,998
<CURRENT-LIABILITIES> 5,358
<BONDS> 0
0
0
<COMMON> 22
<OTHER-SE> 57,618
<TOTAL-LIABILITY-AND-EQUITY> 62,998
<SALES> 0
<TOTAL-REVENUES> 7,864
<CGS> 0
<TOTAL-COSTS> 4,143
<OTHER-EXPENSES> 4,278<F1>
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 63
<INCOME-PRETAX> (2,740)
<INCOME-TAX> 0
<INCOME-CONTINUING> (2,740)
<DISCONTINUED> 0
<EXTRAORDINARY> 672
<CHANGES> 0
<NET-INCOME> (4,083)
<EPS-BASIC> (0.46)
<EPS-DILUTED> (0.46)
<FN>
<F1>ITEM CONSIST OF RESEARCH AND DEVELOPMENT EXPENSES AND AMORTIZATION OF
STOCK-BASED COMPENSATION.
</FN>
</TABLE>