How to identify pin 1 from mechanical design

Question

Looking at 10142048 datasheet from TE I'm not sure how to identify pin 1 from top side.

At page 9 there are the pin assignments from bottom side only. Now, I guess:

• because the side view shows pin 4..6 it means the chip from the bottom view is rotated along the X axis

• if they kept the same rotation pattern for top view, I guess again pin 1 should be in the top-right corner of the top view

Are my assumptions correct? Even in the recommended footprint there are no indications!

By the way, on pages 9 and 11 there are some references to "notes" 4, 1 and 2 but I really cannot find them. Well, there are on page 2 and 4 but I bet they are related to the tables just above them.

Answer 1

On the 7th page of the datasheet (the page numbered 6) there is this diagram which should answer all questions:

Looking at the top side:

Position the chip so the sensor window is near the "top". Pin 1 is then in the lower right-hand corner.

Looking from the bottom:

Pin 1 is closest to the corner which is cut away.

By the way, on pages 9 and 11 there are some references to "notes" 4, 1 and 2 but I really cannot find them. Well, there are on page 2 and 4 but I bet they are related to the tables just above them.

I can't find any references to any "notes" on either page 9 or 11.

If you are talking about the notes which appear in "Figure 13" on "Page 16":

then the notes 1 & 2 in the mechanical drawing were not copied to the datasheet, probably because they refer to the dimensions of the tape & reel packaging which follow industry standards.