I designed a marine radio in 1976 that used 74LS161's.
They could do something like 15 MHz on a good day
at room temperature.  I did a lot of characterization
on them.  100 MHz?  In your dreams...

BTW, if you want to divide by ten in the LS family,
the 74LS160 is a better choice, because it will
divide by 10 without any logic feedback.  It still
won't do 100 MHz.

73
Rick N6RK

On 7/1/2020 1:37 PM, Perry Sandeen via time-nuts wrote:
Learned List

When I was looking for a 100 MHz divide by 10 in a dip package I was advised by 
someone on the list to use the 74LS161.
  It's available on Ebay on ebay from several sources for reasonable prices.
Regards,
Perrier
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