The reason that there was 12 volts on the unit was because I put it
there. I should
have tried 5 volts first but the only datasheet that I could find said
12 volts.
All the eBay units that look the same say 12 volts.
Pete.
On 10/28/2016 12:53 PM, paul swed wrote:
I confirmed the pin out matches a 74s30 also. An S30 is TTL. Great pix to
look at.
So 12 V on a 5 V chip is indeed a smoker. Find out why there was 12 V.
OK crazy talk I see a 1K resistor next to the VCC chip. Would anyone be
crazy enough to use a dropping resistor from 12 V to get 5?? Really bad
engineering and I don't actually believe they would. But if true a open
74s30 would indeed show 12 V on pin 14.
Good luck.
Paul
WB8TSL
On Fri, Oct 28, 2016 at 12:48 PM, jimlux <[email protected]> wrote:
On 10/28/16 9:13 AM, Scott Stobbe wrote:
The OCXO82-59 datasheet lists 12V supply, 5V clock out, could also be a
blown regulator in your ocxo, if it is indeed a 12v model.
There you go..the design could use a 74S30 as a driver - it's fast,
fairly good drive, but runs off 5V. If the regulator is shorted, and you
put 12V on it, it will cook.
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to https://www.febo.com/cgi-bin/m
ailman/listinfo/time-nuts
and follow the instructions there.
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
