This is a high speed counter that is able to circumvent the ripple effect in other more conventional counters (often known as ripple counters). This counter has a maximum input frequency of 230MHz and a propagation time of <4ns on all outputs. This is going to be the counter IC in a frequency counter project that I am currently working on.

Sadly there aren't any particularly interesting pictures of this IC so here is a link to the datasheet:

SN74LV161 Counter IC

and here is a current dropbox link:

Dropbox Link

Please message me if the links do not work and I shall endeavor to get them back up quickly.

Greg