XC4VLX100-11FF1148C Datasheet, PDF (50/58 Pages) Xilinx, Inc – DC and Switching Characteristics

Virtex-4 FPGA Data Sheet: DC and Switching Characteristics
Table 60: Package Skew
Symbol
Description
Device
Package
Value
Units
T_PKGSKEW
Package Skew⁽¹⁾
XC4VLX15
SF363
FF668
80
ps
120
ps
XC4VLX25
SF363
FF668
90
ps
110
ps
XC4VLX40
FF668
FF1148
110
ps
150
ps
XC4VLX60
FF668
FF1148
130
ps
140
ps
XC4VLX80
FF1148
155
ps
XC4VLX100
FF1148
FF1513
140
ps
180
ps
XC4VLX160
FF1148
FF1513
145
ps
180
ps
XC4VLX200
FF1513
180
ps
XC4VSX25
FF668
90
ps
XC4VSX35
FF668
100
ps
XC4VSX55
FF1148
145
ps
XC4VFX12
SF363
FF668
90
ps
100
ps
XC4VFX20
FF672
110
ps
XC4VFX40
FF672
FF1152
120
ps
150
ps
XC4VFX60
FF672
FF1152
110
ps
170
ps
XC4VFX100
FF1152
FF1517
150
ps
170
ps
XC4VFX140
FF1517
150
ps
Notes:
1. These values represent the worst-case skew between any two balls of the package: shortest flight time to longest flight time from Pad to Ball
(7.1 ps per mm).
2. Package trace length information is available for these device/package combinations. This information can be used to deskew the package.
DS302 (v3.7) September 9, 2009
www.xilinx.com
Product Specification
50