Answers Database
Will the heatsink on the bottom of the HQ240 (or smaller packages such as HQ160) short signals on the board.
Record #3514
Product Family: Documentation
Product Line: Packages
Product Part: PQ160
Problem Title:
Will the heatsink on the bottom of the HQ240 (or smaller packages such as HQ160) short
signals on the board.
Problem Description:
Urgency: Standard
General Description:
The HQ240 and smaller packages have a heatsink on the bottom of the part that when mounted
will face the pc board. Some customers are worried that the heat sink will
touch the signal traces on the board and short them together.
Solution 1:
On the HQ240 and smaller packages the heatsink on the bottom of the die is insulated.
Because of this there is no need for an external patch to achieve
insulation, therefore the exposed heatsink will not short traces on the
pc board.
The data for the HQ160 from the Xilinx Web site is based on the
insulated HQ packages:
http://www.xilinx.com/partinfo/databook.htm#Packages
and click on the "Packages and Thermal Characteristics" pdf file.
Additionally, you can check the following link for a description of the
insulation:
http://www.xilinx.com/partinfo/notify/pcn9709a.htm
End of Record #3514 - Last Modified: 07/09/99 11:11 |
