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 <[email protected]> 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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