mems microphone

Thread Starter

South

Joined Apr 7, 2017
35
Hi

I am looking into mems microphones...

I am confused by the datasheet for WMM7037AT2.

I can read the dimensions clearly but I can't figure out the whether the numbers on the PCB pads should go clockwise or anticlockwise?

I've designed a macro in Sprint Layout but am unsure of the pin-outs.

If someone could give me certainty of the numbering of the PCB pads I would be most grateful.

I've attached a couple of clips from the datasheet apparently showing both clockwise and anti-clockwise numbering!

South
 

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StefanZe

Joined Nov 6, 2019
191
Hi the easyEDA layout in your file is correct. It is clockwise when looking at the top view and counterclockwise when looking at the bottom view.
 

Thread Starter

South

Joined Apr 7, 2017
35
OK thank you Stefan

I guess the pads in the other drawing are on the copper bottom layer by default?

South
 

StefanZe

Joined Nov 6, 2019
191
OK thank you Stefan

I guess the pads in the other drawing are on the copper bottom layer by default?

South
They are not on the copper bottom layer. The bottom view is the view you get when you turn around and look at your IC from the bottom. The top view looks at the top of the IC.
The view on the page 1 and 5 is the bottom view. Page 6 shows you the land pattern, which is normally shown in top view.
 
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