Datasheet

Spartan-7 FPGAs Data Sheet: DC and AC Switching Characteristics
DS189 (v1.2) June 20, 2017 www.xilinx.com
Preliminary Product Specification 44
Additional Package Parameter Guidelines
The parameters in this section provide the necessary values for calculating timing budgets for Spartan-7
FPGA clock transmitter and receiver data-valid windows.
Table 49: Package Skew
(1)
Symbol Description Device Package Value Units
T
PKGSKEW
Package skew.
(2)
XC7S6
CPGA196 ps
CSGA225 ps
FTGB196 ps
XC7S15
CPGA196 ps
CSGA225 ps
FTGB196 ps
XC7S25
CSGA225 ps
CSGA324 ps
FTGB196 ps
XC7S50
CSGA324 80 ps
FGGA484 110 ps
FTGB196 ps
XC7S75
FGGA484 ps
FGGA676 ps
XC7S100
FGGA484 ps
FGGA676 ps
Notes:
1. Package delay information is available for these device/package combinations. This information can be used to deskew the package.
2. These values represent the worst-case skew between any two SelectIO resources in the package: shortest delay to longest delay from die pad
to ball.