ON Semiconductor (ON) 10-Q 2017 Q3 Quarterly report

Exhibit 32.1

Certification

Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906

of the Sarbanes-Oxley Act of 2002

For purposes of Section 1350 of Chapter 63 of Title 18 of the United States Code, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, each of the undersigned officers of ON Semiconductor Corporation, a Delaware corporation (the “Company”), does hereby certify, to such officer’s knowledge, that:

The Quarterly Report on Form10-Q for the fiscal quarter ended September 29, 2017 (the “Form10-Q”) of the Company fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)) and the information contained in the Form10-Q fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: November 6, 2017	/s/ KEITH D. JACKSON
	Keith D. Jackson
	President and Chief Executive Officer
Dated: November 6, 2017	/s/ BERNARD GUTMANN
	Bernard Gutmann
	Executive Vice President,
	Chief Financial Officer and Treasurer