The ZL40810 is one of a range of 5V supply, very high speed low power prescalers for professional applications with a fixed modulus of divide by 8. The dividing elements are static D type flip flops and therefore allow operation down to DC if the drive signal is a pulse waveform with fast rise times. The output stage has internal 50 ohm pull up giving a 1V p-p output. See application notes for more details.