
<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM SEMTECH'S
S-3, WHICH INCLUDES RESTATED FINANCIAL STATEMENTS FOR THE THREE YEARS ENDED
JANUARY 29, 1995 AND AS OF JANUARY 30, 1994 AND JANUARY 31, 1993 WHICH ARE
QUALIFIED IN THEIR ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>                     <C>
<PERIOD-TYPE>                   12-MOS                   12-MOS                   12-MOS
<FISCAL-YEAR-END>                          JAN-29-1995             JAN-30-1994             JAN-31-1993
<PERIOD-START>                             JAN-31-1994             FEB-01-1993             FEB-02-1992
<PERIOD-END>                               JAN-29-1995             JAN-30-1994             JAN-31-1993
<CASH>                                            3261                    3153                       0
<SECURITIES>                                       821                    1011                       0
<RECEIVABLES>                                     5367                    4163                       0
<ALLOWANCES>                                         0                       0                       0
<INVENTORY>                                       7313                    5341                       0
<CURRENT-ASSETS>                                 17383                   14268                       0
<PP&E>                                            3491                    3443                       0
<DEPRECIATION>                                       0                       0                       0
<TOTAL-ASSETS>                                   21377                   18260                       0
<CURRENT-LIABILITIES>                             5908                    4645                       0
<BONDS>                                              0                       0                       0
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                          0                       0                       0
<COMMON>                                            72                      68                       0
<OTHER-SE>                                       13643                   11629                       0
<TOTAL-LIABILITY-AND-EQUITY>                     21377                   18260                       0
<SALES>                                          34605                   29353                   27554
<TOTAL-REVENUES>                                 34605                   29353                   27554
<CGS>                                            23333                   20913                   19568
<TOTAL-COSTS>                                    23333                   20913                   19568
<OTHER-EXPENSES>                                  9084                    7991                    7874
<LOSS-PROVISION>                                     0                       0                       0
<INTEREST-EXPENSE>                                 160                     149                     165
<INCOME-PRETAX>                                   2028                     300                    (53)
<INCOME-TAX>                                       526                     102                      50
<INCOME-CONTINUING>                               1502                     198                   (103)
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                      1502                     198                   (103)
<EPS-PRIMARY>                                     0.27                    0.04                  (0.02)
<EPS-DILUTED>                                     0.25                    0.03                  (0.02)
        

</TABLE>
