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Table 9: Spartan-3E CLB Resources
Device CLB
Rows
CLB
Columns
CLB
Total(1) Slices LUTs /
Flip-Flops
Equivalent
Logic Cells
RAM16 /
SRL16
Distributed
RAM Bits
XC3S100E 22 16 240 960 1,920 2,160 960 15,360
XC3S250E 34 26 612 2,448 4,896 5,508 2,448 39,168
XC3S500E 46 34 1,164 4,656 9,312 10,476 4,656 74,496
XC3S1200E 60 46 2,168 8,672 17,344 19,512 8,672 138,752
XC3S1600E 76 58 3,688 14,752 29,504 33,192 14,752 236,032