Can 74VHC4040 work at 250MHz clock input ?? Anyone?
Can 74VHC4040 work at 250MHz clock input ?? Anyone?
(OP)
Hi all,
I have a situation here...I am trying to do some very precise frequency counting. I am trying to use 74VHC4040 in the design at 250MHz with gate charge dissipation resistor to ground (47Ohm) at clock input.will that work? 74VHC4040 spec sheet says Fmax=210MHz...Has anyone used this config before? or have any suggestions...I am trying to take count output on latches only when the counting is over....Let me know if more info i needed.
I have a situation here...I am trying to do some very precise frequency counting. I am trying to use 74VHC4040 in the design at 250MHz with gate charge dissipation resistor to ground (47Ohm) at clock input.will that work? 74VHC4040 spec sheet says Fmax=210MHz...Has anyone used this config before? or have any suggestions...I am trying to take count output on latches only when the counting is over....Let me know if more info i needed.





RE: Can 74VHC4040 work at 250MHz clock input ?? Anyone?
That said if you raise the voltage further you might have a better chance on a one-off. Notice how much faster the part gets with voltage. Maybe run it at 6.8V - you might get to 250Mhz. Otherwise just get the smallest CPLD or FPGA and define a 4040 in it that will run at 2-3Ghz.
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Can 74VHC4040 work at 250MHz clock input ?? Anyone?
RE: Can 74VHC4040 work at 250MHz clock input ?? Anyone?
RE: Can 74VHC4040 work at 250MHz clock input ?? Anyone?
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
RE: Can 74VHC4040 work at 250MHz clock input ?? Anyone?