<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM LUMISYS
INCORPORATED CONSOLIDATED BALANCE SHEETS AT sEPTEMBER 30, 1998 AND CONSOLIDATED
STATEMENTS OF INCOME FOR THE THREE AND NINE MONTHS ENDED SEPTEMBER 30, 1998 AND
IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1000
       
<S>                             <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1998             DEC-31-1998
<PERIOD-END>                               SEP-30-1998             SEP-30-1998
<CASH>                                            5697                    5697
<SECURITIES>                                     14023                   14023
<RECEIVABLES>                                     4521                    4521
<ALLOWANCES>                                     (703)                   (703)
<INVENTORY>                                       3593                    3593
<CURRENT-ASSETS>                                 28874                   28874
<PP&E>                                            1866                    1866
<DEPRECIATION>                                    1295                    1295
<TOTAL-ASSETS>                                   29445                   29445
<CURRENT-LIABILITIES>                             4143                    4143
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                            10                      10
<OTHER-SE>                                       25150                   25150
<TOTAL-LIABILITY-AND-EQUITY>                     29445                   29445
<SALES>                                           5756                   17651
<TOTAL-REVENUES>                                  5756                   17651
<CGS>                                             2599                    7966
<TOTAL-COSTS>                                     2599                    7966
<OTHER-EXPENSES>                                  3084                    9685
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                                 213                     731
<INCOME-PRETAX>                                    286                     770
<INCOME-TAX>                                       110                     298
<INCOME-CONTINUING>                                176                     472
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                       176                     472
<EPS-PRIMARY>                                      .02                     .05
<EPS-DILUTED>                                      .02                     .05
        

</TABLE>