[time-nuts] Performance of 74LVC series ICs

Vlad time at patoka.org
Mon Jun 1 11:00:31 EDT 2015


I am curious, how the integrated gates could be compared for those 
created on discrete elements ? Let say simple gates like this:

http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/trangate.html

Regards,
Vlad


On 2015-05-31 18:23, Attila Kinali wrote:
> On Sun, 31 May 2015 14:06:26 -0400
> Dan Watson <watsondaniel3 at gmail.com> wrote:
> 
>> Has anyone used or experimented with the 74LVC series of ICs? I have 
>> found
>> them quite useful in projects. Supply voltage of 2-5V, and two 
>> inverters or
>> a single gate or flip flip in a SOT package. They make for much 
>> cleaner
>> layouts than large DIPs.
> 
> Yes, quite a few of those. After CPLDs and FPGAs replaced all of the
> more complex 74xxx's, people realized that most projects do not need
> 4 NAND gates at one spot, but rather single ones here and there
> (a schmitt-trigger for signal conditioning, an AND gate to couple two
> enable lines,...).
> 
>> I'm wondering if they are acceptable replacements for 74HC, AC, etc in
>> timing circuits.
> 
> I have never used any of the LVC in a timing circuit, but i would
> guess they are not worse than the AC. Also they have the advantage of
> having single gates per package, which helps minimizing cross coupling
> between different signal paths.
> 
> BTW: [1] may contain some interesting data for you. Especially as it
> compares different manufacturers too.
> 
> Looking at [2], the ALVC family would probably be also worth a look.
> 
> 				Attila Kinali
> 
> 
> [1] "Low Voltage Logic Designers Guide", Ti, 1996
> http://www.ti.com/lit/ml/scba010/scba010.pdf
> 
> [2] "Logic Guide", Ti, 2014
> http://www.ti.com/lit/sg/sdyu001aa/sdyu001aa.pdf

-- 
WBW,

V.P.



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