<PAGE>
<TABLE>
<CAPTION>
EXHIBIT 12
----------
TEXAS INSTRUMENTS INCORPORATED AND SUBSIDIARIES
COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES
(Dollars in millions)
For Nine Months
Ended Sept 30
---------------
1995 1996 1997 1998 1999 1999 2000
----- ----- ----- ----- ----- ----- -----
<S> <C> <C> <C> <C> <C> <C> <C>
Income from continuing operations before
income taxes and fixed charges:
Income before extraordinary item,
interest expense on loans,
capitalized interest amortized,
and provision for income taxes..... $1,604 $ 146 $ 929 $ 774 $2,175 $1,579 $3,781
Add interest attributable to
rental and lease expense........... 41 44 44 41 30 29 23
----- ----- ----- ----- ----- ----- -----
$1,645 $ 190 $ 973 $ 815 $2,205 $1,608 $3,804
===== ===== ===== ===== ===== ===== =====
Fixed charges:
Total interest on loans (expensed
and capitalized)..................... $ 71 $ 108 $ 115 $ 86 $ 84 $ 60 $ 75
Interest attributable to rental
and lease expense.................... 41 44 44 41 30 29 23
----- ----- ----- ----- ----- ----- -----
Fixed charges............................ $ 112 $ 152 $ 159 $ 127 $ 114 $ 89 $ 98
===== ===== ===== ===== ===== ===== =====
Ratio of earnings to fixed charges....... 14.7 1.2 6.1 6.4 19.3 18.0 38.9
===== ===== ===== ===== ===== ===== =====
</TABLE>