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Electronics => Beginners => Topic started by: diyinhk on July 19, 2014, 08:19:16 am

Title: 1G74 and 2G74 different
Post by: diyinhk on July 19, 2014, 08:19:16 am

http://www.mouser.com/ds/2/302/74LVC2G74-352817.pdf (http://www.mouser.com/ds/2/302/74LVC2G74-352817.pdf)

http://www.mouser.com/ds/2/302/74LVC1G74-350009.pdf (http://www.mouser.com/ds/2/302/74LVC1G74-350009.pdf)

I cannot figure out the different from the datasheet.
is it the same part and the different part number is due to history reason :scared:

Title: Re: 1G74 and 2G74 different
Post by: T3sl4co1l on July 19, 2014, 08:02:55 pm

Idunno, but the markings are even the same... :-DD

Tim

Title: Re: 1G74 and 2G74 different
Post by: CarlG on July 19, 2014, 08:46:46 pm

I can't find any difference between the NXP '1G74 vs. '2G74 datasheets either, but the TI corresponding datasheets show some differencies. E g TI '1G74 is only specified at 3.3 and 5V for -40 to +125, and for some packages not recommended at all for that temp  range.

My guess is that NXP supplies the '1G74 as a 2nd source for TI. TI and NXP have had some sort of mutual "2nd source agreement" on std logic; however I don't now if that't the case anymore.

The LVC/ALVC nomenclature is a bit confusing since some parts' '1Gxx refers to "1st generation" while other refers to "single gate" (and '2Gxx to "2nd generation" and "dual gate", respectively).

Title: Re: 1G74 and 2G74 different
Post by: T3sl4co1l on July 19, 2014, 10:40:04 pm

I always thought it was package size or gate count, i.e., it's a single gate but in a 2G (TSSOP8 or whichever others) package.  But something like a 3G14 is in the same package because it's counting gates.

Not that it has to be consistent.  Numbers are inconsistent all over the damn place.  Look at the x86 instruction set...

Tim