100MHz counter

[duke37]

I have a 10Mhz frequency counter board based on a ICM7216A. I would like to count to a higher frequency than this and have looked at various decade counters, they do not go to 100Mhz.
CD74LS90 42MHz
SN7490A 42MHz
74HCT4060 67MHZ
74HC4017 ? 77MHz
Are there any decade counters that go to 100MHz in Dip package (my mig welder won't do surface mount components!)

 

[davenn]

true,

what you really need is a /10 prescaler chip do a google search on such
many of them go far into the GHz range so you could seriously expand your counter's abilities

Dave

 

[(*steve*)]

You can always make a twisted ring counter. It will (with 5 flip flops) divide by 10.

Since only 1 flip flop changes state on each clock transition, you can use logic that otherwise incapable of switching at that speed.

However, a dedicated prescaler may be a better option.