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Where are the 74ALS parts?

autodeskguest

I'm trying to find the following parts:

 

74ALS645D

74ALS08D

 

They don't seem to be in the default libraries nor in any downloadable

libraries I've found.

 

L.

 

Parents

  • Is the difference between the various types within a specific TTL part

     

    Sure, speed, power and often most importantly, voltage trip levels (such as

    74LS08 vs cmos 74HC08 vs 74HCT08) differ.  Unless your app is very

    critical, most speed & power versions will just "drop in".  Of course HC &

    HCT are not TTL, they are CMOS & TTL compatible CMOS devices.

     

    Note the "D" is just one mfg suffix for "DIP" package...others may use

    something other than "D"

     

    RCA invented CMOS, but called it COS/MOS

     

    You can search for 7408* , since some companies also put letters in

    front, because alphabet soup is good for you.

     

     

     

    --

    Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

     

Reply

  • Is the difference between the various types within a specific TTL part

     

    Sure, speed, power and often most importantly, voltage trip levels (such as

    74LS08 vs cmos 74HC08 vs 74HCT08) differ.  Unless your app is very

    critical, most speed & power versions will just "drop in".  Of course HC &

    HCT are not TTL, they are CMOS & TTL compatible CMOS devices.

     

    Note the "D" is just one mfg suffix for "DIP" package...others may use

    something other than "D"

     

    RCA invented CMOS, but called it COS/MOS

     

    You can search for 7408* , since some companies also put letters in

    front, because alphabet soup is good for you.

     

     

     

    --

    Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

     

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