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SN74BCT245: pad dimensions

cafain
Mastermind 6755 points
Part Number: SN74BCT245

Hi Staff

Please tell me the recommended pad dimensions for PCB mounting of SN74BCT245NSR.
(Board Layout)

best regards
cafain

  • 0
    Guru 316640 points

    For such a large pin pitch, the details of the land pattern are not critical.

    You can download CAD symbols from Ultra Librarian: on the SN74BCT245 web page, go to "Design & development" / "CAD/CAE symbols" / "View options".

  • 0 in reply to Clemens Ladisch
    Mastermind 6755 points

    Hello Clemens-san

    I downloaded the CAD symbol (from UltraLibrarian) from the SN74BCT245 web page.
    The size of the footprint will be 85mil x 22mil.

    Is it possible to provide package size information in the following format?
    In this example
    ・20×(1.85)
    ・20×(0.45)
    ・(7)

    With these three pieces of information, you'll have better footprint information.

    best regards
    cafain

  • 0 in reply to cafain
    TI__Guru* 97046 points

    Hi cafain-san,

    The information we provide is formatted to match TI standards.

    As Clemens said, with this size/type of package, the footprint is not critical to system design.

    You can use the UltraLibrarian files that we recommend, or you can build one yourself and adjust the pad sizes to your liking. I would guess that you have other NS package devices in your parts list -- you can use the same dimensions for the pads from an existing design or a similar device.