Hi Attila Thanks for the history about 74 series. BTW, The result.gif is a TDEV chart. I only know that different K means different kinds of noise. I don't know what it means if the turnning corner comes earlier or latter.
Hi Charles Thanks for the circuit. I have some LT1016 in hand, I will evaluate with it. 2015-02-25 0:02 GMT+08:00 Attila Kinali <[email protected]>: > On Tue, 24 Feb 2015 14:43:10 +0800 > Li Ang <[email protected]> wrote: > > > I saw people talking about using 74AC to square the signal, what's > the > > difference between 74LVC and 74AC? 74AC is not easy to get. > > These are different families of chip production. You can see the 74HCxx as > the grandfather, 74ACxx as the father and the 74LVCxx as the son. > > IIRC the AC (Advanced CMOS) was introduced in the 80s. The process > which they were produced got superseeded and also the voltage levels > went down. The LVC (Low Voltage CMOS) and LVX families are the current > choice for logic gates. The main difference is that the node size (those nm > measures people boast with, when they talk about chips these days) went > down and with that the threshold voltage of the FETs and the maximum > voltage the chips can withstand. Of course there are differences in the > timing specs as well. > > TI's Logic Guide[1] and their Logic Migration Guide[2] contain > additional information. > > > Attila Kinali > > > [1] http://www.ti.com/lit/sg/sdyu001aa/sdyu001aa.pdf > [2] http://www.ti.com/lit/ml/scyb032/scyb032.pdf > > -- > It is upon moral qualities that a society is ultimately founded. All > the prosperity and technological sophistication in the world is of no > use without that foundation. > -- Miss Matheson, The Diamond Age, Neil Stephenson > _______________________________________________ > 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.
