<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM LUMISYS
INCORPORATED CONSOLIDATED BALANCE SHEETS AT SEPTEMBER 30, 2000 AND CONSOLIDATED
STATEMENTS OF INCOME FOR THE THREE AND NINE MONTHS ENDED SEPTEMBER 30, 2000 AND
IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENT.
</LEGEND>
<CIK> 0001001289
<NAME> LUMISYS INCORPORATED
<MULTIPLIER> 1,000
<S> <C> <C>
<PERIOD-TYPE> 3-MOS 9-MOS
<FISCAL-YEAR-END> DEC-31-2000 DEC-31-2000
<PERIOD-START> JUL-01-2000 JAN-01-2000
<PERIOD-END> SEP-30-2000 SEP-30-2000
<CASH> 9,732 9,732
<SECURITIES> 4,573 4,573
<RECEIVABLES> 3,183 3,183
<ALLOWANCES> (807) (807)
<INVENTORY> 3,462 3,462
<CURRENT-ASSETS> 2,514 2,514
<PP&E> 2,401 2,401
<DEPRECIATION> (1,778) (1,778)
<TOTAL-ASSETS> 23,280 23,280
<CURRENT-LIABILITIES> 4,855 4,855
<BONDS> 0 0
0 0
0 0
<COMMON> 9 9
<OTHER-SE> 18,236 18,236
<TOTAL-LIABILITY-AND-EQUITY> 23,280 23,280
<SALES> 4,473 14,755
<TOTAL-REVENUES> 4,473 14,755
<CGS> 2,348 7,912
<TOTAL-COSTS> 2,348 7,912
<OTHER-EXPENSES> 3,030 8,894
<LOSS-PROVISION> 0 0
<INTEREST-EXPENSE> (161) (617)
<INCOME-PRETAX> (744) (1,434)
<INCOME-TAX> 0 0
<INCOME-CONTINUING> (744) (1,434)
<DISCONTINUED> 0 0
<EXTRAORDINARY> 0 0
<CHANGES> 0 0
<NET-INCOME> (744) (1,434)
<EPS-BASIC> (.08) (.16)
<EPS-DILUTED> (.08) (.16)
</TABLE>