POWER OF ATTORNEY

The undersigned, as a Section 16 reporting person of
Tyco International Ltd. (the "Company"), hereby
constitutes and appoints William B. Lytton, John S.
Jenkins, Jr. and Brian C. Lucas each of them, the
undersigned's true and lawful attorney-in-fact to:

I.	complete and execute Forms 3, 4 and 5 and other
forms and all amendments thereto as such attorney-in-
fact shall in his or her discretion determine to be required
or advisable pursuant to Section 16 of the Securities
Exchange Act of 1934 (as amended) and the rules and
regulations promulgated thereunder, or any successor
laws and regulations, as a consequence of the
undersigned's ownership, acquisition or disposition of
securities of the Company; and

II.	 do all acts necessary in order to file such forms
with the Securities and Exchange Commission, any
securities exchange or national association, the Company
and such other person or agency as the attorney-in-fact
shall deem appropriate.

The undersigned hereby ratifies and confirms all that said
attorneys-in-fact and agents shall do or cause to be done
by virtue hereof. The undersigned acknowledges that the
foregoing attorneys-in-fact, in serving in such capacity at
the request of the undersigned, are not assuming, nor is
the Company assuming, any of the undersigned's
responsibilities to comply with Section 16 of the
Securities Exchange Act of 1934 (as amended).

This Power of Attorney shall remain in full force and
effect until the undersigned is no longer required to file
Forms 3, 4, and 5 with respect to the undersigned's
holdings of and transactions in securities issued by the
Company, unless earlier revoked by the undersigned in a
signed writing delivered to the Company and the
foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused
this Power of Attorney to

be executed as of this 1st day of June,
2005.


Signature: /s/ Dana S. Deasy

Print Name: Dana S. Deasy