The ORCASeries 2 series of SRAM-based FPGAs are an enhanced version of the ATT2C/2T architecture.

The latest ORCAseries includes patented architectural enhancements that make functions faster and easier to design while conserving the use of PLCs and routing resources.

The Series 2 devices can be used as drop-in replace ments for the ATT2Cxx/ATT2Txx series, respectively, and they are also bit stream compatible with each other.

The usable gate counts associated with each series are provided in Table 1. Both series are offered
in a variety of packages, speed grades, and temperature ranges.