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AR# 59056

V5QV - Unbonded or No connect pins connection

Description

(UG520) 5QV Packaging and Pinout specification states that all unbonded or no connect pins must be connected to ground.

What is the reason for this?

Solution

 In space application you do not want any metal to be completely isolated, as this would allow it to build up charge that it can eventually discharge and cause damage.

You actually want charge to bleed off.

For this reason PCB design should follow the recommendation in Packaging user guide (UG520) to ground any unconnected pin.
AR# 59056
Date Created 01/10/2014
Last Updated 03/16/2015
Status Active
Type General Article
Devices
  • Virtex-5QV