LM4549B: Pinning difference

Frank Rothoff

Part Number: LM4549B

Hi Team,

My customer has below challenge:

We are putting LM4549BVHX/NOPB into our CAD library and there seems to be a discrepancy on two pins.

https://www.ti.com/lit/ds/symlink/lm4549b.pdf?ts=1713269333223&ref_url=https%253A%252F%252Fwww.ti.com%252Fsitesearch%252Fen-us%252Fdocs%252Funiversalsearch.tsp%253FlangPref%253Den-US

Page 4: Shows 34 as 3DP and 33 as 3DN

In the pinout table view on Page 7, is it opposite:

Can you advise which is correct, the table view on page 7 or the package view on page 4?

over 1 year ago

0 Frank Rothoff over 1 year ago

TI__Expert 6390 points

There are 2 more pinout question that we would like to confirm:

Is SDATA_IN is an output

And SDATA_OUT is an input??

0 Jeff McPherson over 1 year ago in reply to Frank Rothoff

TI__Mastermind 44035 points

Hi Frank,

3DP is Pin 34 and 3DN is 33. The table is backward. All the other resources I find list it the same way as the pinout diagram.

You're correct, SDATA_IN is an output and SDATA_OUT is an input to the codec respectively. They're labelled with respect to the AC '97 controller, not the codec which is why it appears backwards.

Best regards,
Jeff McPherson

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LM4549B: Pinning difference