[time-nuts] Divide by five
Bob Bownes
bownes at gmail.com
Sat Nov 8 05:19:53 UTC 2014
I'm surprised no one has suggested 74F161 or other F series. Power hungry, but rated to in excess of 100mhz, some vendors as high as 120mhz, at ordinary temps. I will have to look, but I might have a tube or two of them in the basement. I know I have most of the other 74F.
> On Nov 7, 2014, at 23:20, Said Jackson via time-nuts <time-nuts at febo.com> wrote:
>
> Joe,
>
> This puppy can go to 166MHz over temp and has standard 100 mil pin spacing if you put it into a socket: ATF16V8C
>
> I have not used PALs since 1992 but I used to be extremely fond of the 16R8 and 22V10 types back then.
>
> This is a 16V8 that will do your divider in no time:
>
> http://www.digikey.com/product-detail/en/ATF16V8C-5JX/ATF16V8C-5JX-ND/1027054
>
> Best of all its available and only ~$3..
>
> Said
>
> Sent From iPhone
>
>> On Nov 7, 2014, at 19:37, Joseph Gray <jgray at zianet.com> wrote:
>>
>> Looks like I can get the 74AC161 in DIP from Mouser. Thanks to everyone for
>> the suggestions. I still like DIP for prototyping on breadboards.
>>
>> Joe Gray
>> W5JG
>>
>>
>>> On Fri, Nov 7, 2014 at 4:45 PM, Alex Pummer <alex at pcscons.com> wrote:
>>>
>>>
>>>
>>> check if you could get a 74AC161, which could be connected to divide by 5
>>> at 125 MHz see here http://ecee.colorado.edu/~mcleod/pdfs/IADE/references/
>>> 74AC161.pdf to be sure to work at 125MHz run with 5,5 to 6V...
>>>
>>> 73
>>> Alex
>>>
>>>
>>>
>>>> On 11/7/2014 1:12 PM, Joseph Gray wrote:
>>>>
>>>> I need to divide a 125 Mhz clock by five. I have looked on Mouser and
>>>> every
>>>> chip I find is either obsolete or in SMT. Can anyone recommend a chip that
>>>> is fast enough and comes in DIP?
>>>>
>>>> Joe Gray
>>>> W5JG
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