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Maximum clock frequency of 74hc393N

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contau

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Hi, What is the maximum frequency of NXP 74HC393N?. In Datasheet, the max is 106 Mhz. I used it for prescaler, the clock up to 108-110Mhz. Can i get bigger frequency?
 

I guess you can't use it.
Operation within the spec is required to reduce the future trouble.
 
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    contau

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tony_lth said:
I guess you can't use it.
Operation within the spec is required to reduce the future trouble.
Click to expand...
Thank u for answer. I want to know the maximum clock of 74hc393 even larger than in spec. The max i test is 110 Mhz. I don't know the limit of clock. Anyone can tell me know?
 

Such limits are usually fuzzy, can differ from device to device, temperature and sometime i hear jokes about phase of moon can affect it.
I have seen commercial design with microwave prescaler chip used beyond limit, but i think that it was because there was no other choice available on the market at that time.
 

Or 74VHC - 170MHz. There are a lot of different 74xx variants out there with different speeds. It should be easy to find one fast enough.

Keith
 

keith1200rs said:
Or 74VHC - 170MHz. There are a lot of different 74xx variants out there with different speeds. It should be easy to find one fast enough.

Keith
Click to expand...
Maybe easy for u but not for me. I have only 74hc393N, so i try to get the fastest clock as it can.

- - - Updated - - -

Terminator3 said:
Such limits are usually fuzzy, can differ from device to device, temperature and sometime i hear jokes about phase of moon can affect it.
I have seen commercial design with microwave prescaler chip used beyond limit, but i think that it was because there was no other choice available on the market at that time.
Click to expand...
yes, when running beyond limit, the frequecy is easy to "drift". But i don't know the moon can make it change(^^)
 

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