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74HC573N vs 74HC573A vs?

Davey Hudson
Prodigy 40 points
Other Parts Discussed in Thread: CD74HC573, SN74HC573A

We're looking to substitute a 74HC573N as it's been discontinued. Wound the SN74HC573AN work? I've looked all over and cannot find out what the "A" suffix means. Would the CD74HC573 be better?  

Thanks!

  • 0
    TI__Guru* 96591 points

    Davey,

    The 74HC573N is an NXP part, if I'm not mistaken.  The SN74HC573A or CD74HC573 should both work as pin-to-pin replacements for the 74HC573N.  Which one you choose will depend on your application.

     

    If you would like more help selecting the right part, I will need details about your application.  A detailed schematic is usually the best way to tell me what you want.

  • 0
    Prodigy 40 points
    74HC573 is a standard 74xx logic designation and the "N" is plastic DIP. My question is what the "A" and "E" suffixes represents so I can determine the suitability. Thanks!
  • 0 in reply to Davey Hudson
    TI__Guru* 96591 points

    On TI parts, a single letter following the part indicator (in this case 573) is either a revision indicator or part of the package code (for example DBV = SOT-23).  The 'A' indicates a part that has undergone one revision (ie the internal structure was rebuilt for some reason).  It should not affect the operation of the part.  The package codes can be found in the datasheet.  If there is a hyphen, it is an additional modifier (ex: -Q1 means Automotive qualified).

    I have not seen a TI part with an 'N' to indicate a plastic package -  that doesn't mean they don't exist though - after all, just my group deals with 19k unique orderable parts.