THANKS Trygve & Don
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Posts: 46,084
Trygve thanks for your answers to the mysterious IC family trees. I printed
out your reply and will referr to it in choosing the correct IC family. Don
thanks for the book reference I will go looking for a source for it.
Thanks again
Eric
Original Message
From: "Trygve Henriksen" <trygve.henriksen@v...>
To: <basicstamps@yahoogroups.com>
Sent: Sunday, June 16, 2002 1:59 PM
Subject: SV: [noparse][[/noparse]basicstamps] knowledge extraction
> Greetings!
>
> Most of the differences is power and speed...
> The original 7400 series is the slowest, then the 'S' series is faster,
but
> uses more power.
> The 'LS' series is 'Low power Schottky'(the type of transistors used) and
> retains the speed of the 'S' series but draws less power..
> The 'C' series are CMOS based,(I think) so draws little power but are
slow.
> The 'HC' is 'High Speed', and are faster. The same goes for 'HCT'
> I usually stick to HCT or HC circuits if available, and speed isn't an
> issue. (It usually isn't unless you're working at very high speeds)
>
> The 4000 series are CMOS, and don't really operate at ordinary TTL levels,
> but if they're fed +5V, they're close enough. I really don't recommend
> mixing the types unless necessary.
> They CAN operate at other power levels than +5V though, so may be better
> suited to some applications.
>
> One problem you may have to look out for is Fanin/Fanout problems.
> This is power related, and varies from case to case. (Look at the sink
> capabilities of the outputs of a circuit, and compare with the drain of
the
> inputs that are connected to it)
> Usually this isn't a problem with less than 10 inputs connected to an
> output.
>
> :-)
> Trygve
>
>
>
Opprinnelig melding
> Fra: Eric Adams [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=xoXwzJGqgqdpilhad0TOWSiTywV_6IsgnpbMKdju0lO1WZ9vnDqal3MmiKGb5Hvazy7MRpb4_unGQJVr02c]hugs102@b...[/url
> Sendt: 16. juni 2002 19:46
> Til: basicstamps@yahoogroups.com
> Emne: Re: [noparse][[/noparse]basicstamps] knowledge extraction
>
>
> Hi Stampers
> Does anyone know a good source to help explain the advantages,
disadvantages
> and compatabilites of the different logic families that are out there.
> First it was the 7400 series then C, LS, S, HC, HCT, and the CD 4000
series.
> Most of these have IC's that perform the exact function but in different
> families.
>
> A few weeks back reference was made to some book that I saw several of you
> recommend. I was thinking of ordering it but I lost the name of this
book.
> Would this book cover this type information? I asked TI on their web site
if
> they had any info on the different families but haven't received a reply
in
> over 1 month.
>
> Thanks and Happy Fathers day to all that qualify
> Eric Adams
> . _________________________________________________________________
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>
out your reply and will referr to it in choosing the correct IC family. Don
thanks for the book reference I will go looking for a source for it.
Thanks again
Eric
Original Message
From: "Trygve Henriksen" <trygve.henriksen@v...>
To: <basicstamps@yahoogroups.com>
Sent: Sunday, June 16, 2002 1:59 PM
Subject: SV: [noparse][[/noparse]basicstamps] knowledge extraction
> Greetings!
>
> Most of the differences is power and speed...
> The original 7400 series is the slowest, then the 'S' series is faster,
but
> uses more power.
> The 'LS' series is 'Low power Schottky'(the type of transistors used) and
> retains the speed of the 'S' series but draws less power..
> The 'C' series are CMOS based,(I think) so draws little power but are
slow.
> The 'HC' is 'High Speed', and are faster. The same goes for 'HCT'
> I usually stick to HCT or HC circuits if available, and speed isn't an
> issue. (It usually isn't unless you're working at very high speeds)
>
> The 4000 series are CMOS, and don't really operate at ordinary TTL levels,
> but if they're fed +5V, they're close enough. I really don't recommend
> mixing the types unless necessary.
> They CAN operate at other power levels than +5V though, so may be better
> suited to some applications.
>
> One problem you may have to look out for is Fanin/Fanout problems.
> This is power related, and varies from case to case. (Look at the sink
> capabilities of the outputs of a circuit, and compare with the drain of
the
> inputs that are connected to it)
> Usually this isn't a problem with less than 10 inputs connected to an
> output.
>
> :-)
> Trygve
>
>
>
Opprinnelig melding
> Fra: Eric Adams [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=xoXwzJGqgqdpilhad0TOWSiTywV_6IsgnpbMKdju0lO1WZ9vnDqal3MmiKGb5Hvazy7MRpb4_unGQJVr02c]hugs102@b...[/url
> Sendt: 16. juni 2002 19:46
> Til: basicstamps@yahoogroups.com
> Emne: Re: [noparse][[/noparse]basicstamps] knowledge extraction
>
>
> Hi Stampers
> Does anyone know a good source to help explain the advantages,
disadvantages
> and compatabilites of the different logic families that are out there.
> First it was the 7400 series then C, LS, S, HC, HCT, and the CD 4000
series.
> Most of these have IC's that perform the exact function but in different
> families.
>
> A few weeks back reference was made to some book that I saw several of you
> recommend. I was thinking of ordering it but I lost the name of this
book.
> Would this book cover this type information? I asked TI on their web site
if
> they had any info on the different families but haven't received a reply
in
> over 1 month.
>
> Thanks and Happy Fathers day to all that qualify
> Eric Adams
> . _________________________________________________________________
> > Download MSN Explorer gratis van http://explorer.msn.nl/intl.asp.
> >
> >
> > To UNSUBSCRIBE, just send mail to:
> > basicstamps-unsubscribe@yahoogroups.com
> > from the same email address that you subscribed. Text in the Subject
and
> Body of the message will be ignored.
> >
> >
> > Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
> >
> >
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject and
> Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject and
Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>