The following link has details about part number markings (http://www.cypress.com/?rID=38077) . Please contact sales representative for more information.
Additional information regarding part marking is available from the following link:
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We just deployed this information (as-is) with available data as of this writting. QFN part markings is in the works, should be included in this link over the next few weeks.
This information is also
available as a link under every product Marketing Part number page (under "Quality and Pb-Free data")