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| Number | Description | Effective Date |
| PCN98003 | The Xilinx XC9500 Product Family will be manufactured in the 0.5µM Flash Process at UMC. | June 24, 1998 |
| PCN98002 | Qualification of SPIL (Siliconware Precision Industries Company, Ltd.) of Taiwan as an alternate Assembly Subcontractor. | May 18, 1998 |
| PDN98001 | Discontinuation of the MQFP (Metal Quad Flat Pack) package option for certain XC4000 products. | June 15, 1998 |