Request for 28 BIT ADDER maximum clock rates for Vertex II F

[Bill Hanna]

Has anyone tested 28 BIT ADDERS in Vertex II for maximum clock rate
thru the ripple carry chain? I have an application That requires a
maximum clock frequency of 80 MHz.

Thanks,
Bill

 

[John_H]

80 MHz is extremely slow and easily achieved in any FPGA introduced in the
last several years. I would expect that 200 MHz is easy in the slowest
speed grade of Virtex-II but I haven't bothered to run the numbers.


"Bill Hanna" <billh40@aol.com> wrote in message
news:97d137ce.0408111414.1d4f1011@posting.google.com...

Has anyone tested 28 BIT ADDERS in Vertex II for maximum clock rate
thru the ripple carry chain? I have an application That requires a
maximum clock frequency of 80 MHz.

Thanks,
Bill