Attention Valued Customer,

Subject: Minor modification in the package outline specification of thermally enhanced BG and FG series packages meeting the JEDEC-MO-191.

Affected Package codes
BG352 - Xilinx reference OBG0008
BG432 - Xilinx reference OBG0009
BG560 - Xilinx reference OBG0010
FG680 - Xilinx reference OBG0022

Change description: Xilinx is modifying the specification that controls the mechanical dimensions of the copper heatsink on these BGA packages. The current specification 
implied a heatsink that is coincident with the package body. The proposed modification will allow the heatsink to be pulled back from the edge by a maximum of 0.375mm (14.7mils) per side. The current products will meet the change since their heatsink is coincident (0.0 pull back) with the package. 

The attached outline drawings show the change in the actual package outlines. No other change is made in the package outline specification. There is no functional change in product performance or characteristics. 

Reason for Change: This minor physical change in heatsink specification will allow Xilinx to consider pieceparts from other sources. The new specification will allow alternate sources to meet the outline drawing, and more importantly to support the anticipated growing needs of the enhanced BGA packages.

Key Dates: The specification change is immediate. Products with coincident heatsinks will continue to ship and these will continue to meet the specification.  Qualification test of product with pull back heatsinks will be completed prior to shipment of product.  This data will be available upon request via email at pcn@xilinx.com.

Xilinx plans to ship product with pull back heatsinks meeting the new specification during January, 2001. 

Traceability: Products built with non-coincident heatsink can be recognized by sight. We consider the physical change to be minor with no functional changes in product performance or characteristics.

Response: No response to this notification is required. Please address any other questions you may have via e-mail at pcn@xilinx.com, or directly by fax at (408) 369-1718.