EXHIBIT 12
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                          TEXAS INSTRUMENTS INCORPORATED AND SUBSIDIARIES                        
                         COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES                 
                                       (Dollars in millions)                                     

                                                                         
                                                     1998     1997     1996     1995     1994    
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Income from continuing operations before                                                         
  income taxes and fixed charges:                                                                
    Income before extraordinary item and
      interest expense on loans,                                                                 
      capitalized interest amortized,                                                            
      and provision for income taxes..........      $ 710    $ 825   $   65   $1,530   $  943    
    Add interest attributable to                                                                 
      rental and lease expense................         41       44       44       41       40    
                                                    -----    -----   ------   ------   ------   
                                                    $ 751    $ 869   $  109   $1,571   $  983   
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Fixed charges:
  Total interest on loans (expensed
    and capitalized)..........................      $  85    $ 114   $  108   $   69   $   58    
  Interest attributable to rental
    and lease expense.........................         41       44       44       41       40    
                                                    -----    -----    -----    -----    -----   
Fixed charges.................................      $ 126    $ 158   $  152   $  110   $   98    
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Ratio of earnings to fixed charges............        6.0      5.5        *     14.3     10.0   
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* Not meaningful.  The coverage deficiency was $43 million in 1996.