which are logic ics for or above 100 MHz operation ?
which are logic ics for or above 100 MHz operation ?
Schottky-TTL logic (74AS, 74ALS, etc), emitter coupled logic (ECL, PECL, LVPECL, etc), some programmable logic (CPLD, FPGA) and application specific ICs may have propagation delay under 10ns...
74ACxx powered at 5 V will run to 125 MHz (flip-flop clock speed).
Unless it's a very simple logic, logic IC's like the 7400 series are rarely used nowadays.
Instead of discreet 7400 type logic, nowadays FPGAs/CPLDs are used. and most of them (FPGAs/CPLDs) can do 100MHz or more. Even more, there is a myriad of microcontrollers that can do logic operations in the 100s of MHz range.
What logic do you want to implement? How complex it is? What project do you had in mind while you were asking the question?