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AR# 20861

7.1i IBISWriter - Virtex-4 LVDSEXT_25 IBIS model shows smaller than expected signal swing

Description


General Description:

The LVDSEXT_25 IBIS model generated by IBISWriter for a Virtex-4 design shows a differential signal swing that is reduced approximately 20% from the same model for Virtex-II and Virtex-II Pro.

Solution


A corrected model is available in v1.4 of the Virtex-4 IBIS file, available on the web at: http://support.xilinx.com/support/sw_ibis.htm.


IBISWriter will support v1.4 starting with 7.1isp2 design tools.
AR# 20861
Date Created 09/03/2007
Last Updated 11/23/2011
Status Archive
Type General Article