<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 5
<RESTATED>
<MULTIPLIER> 1,000
       
<S>                             <C>                        <C>                          <C>                    
<PERIOD-TYPE>                   YEAR                       YEAR                         YEAR                   
<FISCAL-YEAR-END>                          DEC-31-1996                DEC-31-1995                  DEC-31-1994
<PERIOD-START>                             JAN-01-1996                JAN-01-1995                  JAN-01-1994 
<PERIOD-END>                               DEC-31-1996                DEC-31-1995                  DEC-31-1994 
<CASH>                                         213,970                    147,050                            0 
<SECURITIES>                                   159,181                     90,843                            0 
<RECEIVABLES>                                  105,145                     32,138                            0 
<ALLOWANCES>                                     2,000                        900                            0 
<INVENTORY>                                     49,241                     26,868                            0 
<CURRENT-ASSETS>                               572,299                    307,777                            0 
<PP&E>                                          53,600                     14,897                            0 
<DEPRECIATION>                                  13,566                      4,789                            0 
<TOTAL-ASSETS>                                 651,866                    370,014                            0 
<CURRENT-LIABILITIES>                          104,416                     45,027                            0 
<BONDS>                                              0                          0                            0 
<PREFERRED-MANDATORY>                                0                          0                            0 
<PREFERRED>                                          0                          0                            0 
<COMMON>                                           119                        113                            0 
<OTHER-SE>                                     547,331                    324,874                            0 
<TOTAL-LIABILITY-AND-EQUITY>                   651,866                    370,014                            0 
<SALES>                                        549,297                    152,604                       39,655
<TOTAL-REVENUES>                               549,297                    152,604                       39,655
<CGS>                                          192,226                     53,296                       13,387
<TOTAL-COSTS>                                  192,226                     53,296                       13,387
<OTHER-EXPENSES>                               182,535                     60,008                       21,117     
<LOSS-PROVISION>                                     0                          0                            0
<INTEREST-EXPENSE>                             (11,879)                    (5,122)                        (969)
<INCOME-PRETAX>                                186,415                     44,422                        6,120
<INCOME-TAX>                                    73,304                     16,887                         (430)
<INCOME-CONTINUING>                            113,111                     27,535                        6,550
<DISCONTINUED>                                       0                          0                            0 
<EXTRAORDINARY>                                      0                          0                            0 
<CHANGES>                                            0                          0                            0 
<NET-INCOME>                                   113,111                     27,535                        6,550
<EPS-PRIMARY>                                     0.89                       0.25                         0.07
<EPS-DILUTED>                                     0.89                       0.25                         0.07
        

</TABLE>