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mark krawczuk
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 Posted: Thu Jul 31, 2008 7:05 am Post subject: ttl ic`s |
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hi, i`m trying to build a bdm32 interface to program my saab trionic ecu ,
put the parts list is for hc ttl ic`s , i have ls ttl ic`s , are these
interchangable ?
thanks,
mark k |
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legg
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| Posted: Thu Jul 31, 2008 9:25 pm Post subject: Re: ttl ic`s |
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On Thu, 31 Jul 2008 15:03:40 +0930, "mark krawczuk"
<krawczuk@adam.com.au> wrote:
[quote]hi, i`m trying to build a bdm32 interface to program my saab trionic ecu ,
put the parts list is for hc ttl ic`s , i have ls ttl ic`s , are these
interchangable ?
thanks,
mark k
[/quote]
HC are CMOS with different logic levels and loading capabilities. They
are proably easier to obtain nowadays than standard TTL.
RL |
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Michael Black
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| Posted: Thu Jul 31, 2008 10:16 pm Post subject: Re: ttl ic`s |
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On Thu, 31 Jul 2008, legg wrote:
[quote]On Thu, 31 Jul 2008 15:03:40 +0930, "mark krawczuk"
krawczuk@adam.com.au> wrote:
hi, i`m trying to build a bdm32 interface to program my saab trionic ecu ,
put the parts list is for hc ttl ic`s , i have ls ttl ic`s , are these
interchangable ?
thanks,
mark k
HC are CMOS with different logic levels and loading capabilities. They
are proably easier to obtain nowadays than standard TTL.
From the subject header, I figured the post would be about some old[/quote]
schematic that used straight TTL, while the poster wanted to use
more recent variants.
I still have some straight TTL around, but that>s because when I
started with the 74XX family, TTL was the norm, with "H" and "S" sort
of there. I>m surprised that someone would have TTL and nothing more
recent lying about.
Michael |
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