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AR# 228

XC4000: capacitance of XC4000 inputs

Description

Urgency: Standard

Keywords: XC4000, Capacitance, Pins

Description

The capacitive loading of XC4000 pins ranges from 10pf to 15pf.
The pins near the center of the device are around 10pf. The
pins on the corners are around 15pf.Thus, the spec reads 15pf.
5pf is due to the IOB and the other 5pf-10pf is from the package and arrangement. The PLCC is actually one of the better packages (less pf loading) The PGA is one of the worst (more pf loading.)

Solution

AR# 228
Date Created 08/31/2007
Last Updated 10/01/2008
Status Archive
Type General Article