Question

For an n" input LUT how many SRAM cells are required

Answer 1

In general, FPGA employs LUTs as a primary resource to realize a target logic function. A typical N-input LUT consists of 2N 1-bit SRAM cells and N – 1 2-to-1 MUXs. Figure 2a depicts 4-input LUT as an example with 16 1-bit SRAM cells and 15 2-to-1 MUXs.