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CD74HC154: About pkg demention(DW)

user6345333

Intellectual 260 points

Part Number: CD74HC154

Tool/software:

To the person in charge

Please tell me about the DW (R-PDSO-G24) on page 12 of the datasheet.
Which part of this shows coplanarity?

p/n：CD74HC154M96

Best Regards

Shingu

0 Owen Westfall 23 days ago

TI__Genius 12981 points

Hi Shingu,

We do not provide an ideal plane for much of our package specs. All of our specs come with a range of measurements if looking for the pins specifically you can see those measurements highlighted. The ideal plane can be the average between the two numbers.

Regards,

Owen

0 user6345333 22 days ago

Intellectual 260 points

Hi Owen,

Thank you for prompt reply.

Best regards

Shingu

0 user6345333 22 days ago in reply to user6345333

Intellectual 260 points

Hi Owen,

Please tell me one more thing?
I think A means the spec of stand-off, but what does B represent?

0 Owen Westfall 22 days ago in reply to user6345333

TI__Genius 12981 points

Hi Shingu,

That is the seating plane

seating plane (1) (of a package, general)

The reference plane that designates the interface between the package or its terminals and the surface on which it is mounted.

Regards,

Owen