36-macrocell / 800 gate Xilinx XC9500XL series CPLD, available in 44PLCC/44TQFP/48CSBGA/64TQFP packages. The one we decapped was a 44TQFP. Note probe scrub marks from wafer test on unbonded pads.
Approximate size: 1390 x 3150 μm (4.38 mm^2)
http://siliconpr0n.org/map/xilinx/xc9536xl/mcmaster_mz_neo50xulwd/
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