OPT3001: Difficult to recognize the correct pin 1 directly.

Kyle Chang27

Prodigy 135 points

Part Number: OPT3001

Dear,

Our factory operator can not recognize this IC's pin direction / location easily on the SMT line.

Do you have any experience about this issue? could you share with us how to solute it?

Could TI add a body mark to solute it?

over 8 years ago

0 Alex Bhandari-Young over 8 years ago

TI__Mastermind 26345 points

Hi Kyle,

The OPT3001 has a pin 1 marker but it is on the bottom side of the chip (see datasheet page 41). There is no pin marker on the top side of the chip. However, the chip does have a rectangular bar at the top that can also be used to determine the orientation (see image below). You may need a magnifier or microscope to see it clearly though.

I do not think we are able to add a body mark, but please let me know if these solutions do not work for you or you need more info.

Best,

Alex

0 Kyle Chang27 over 8 years ago in reply to Alex Bhandari-Young

Prodigy 135 points

Dear Alex,

I think it still difficult to recognize by operator.

It must use magnifier to recognize.

Is there a way to think of the identification method?

Any ODM/OEMs do not have this SMT issue?

Thanks~

Kyle.

0 Alex Bhandari-Young over 8 years ago in reply to Kyle Chang27

TI__Mastermind 26345 points

Hi Kyle,

Sorry for the delay as I was out of office last week. I've been checking on this and have not found anyone else having this issue. Since the package is transparent and required for light sensing we cannot really add a marking on it.

Were you able to find a solution or are you still struggling with this?

Best,

Alex

0 Kyle Chang27 over 8 years ago in reply to Alex Bhandari-Young

Prodigy 135 points

Dear Alex,

Thanks for your response.

How about cut a corner nearby pin 1?

Kyle.

0 Alex Bhandari-Young over 8 years ago in reply to Kyle Chang27

TI__Mastermind 26345 points

Hi Kyle,

I checked on cutting the corner, but the packaging person I talked to was still thinking that a cut would be too small to see if the current markings on the device are already too small since it would have to be around the same size. Another option is that the device is oriented within the tape and reel. Would this work for knowing where pin 1 is?

Best,

Alex

0 Kyle Chang27 over 8 years ago in reply to Alex Bhandari-Young

Prodigy 135 points

Dear Alex,
Option seems a good idea, but does it have any risk for error direction? like wrong at beginning package or other risk?
Maybe both of two solution can be use at the same?
I think it can solve most of the problems~
How should I do to let factory get this reel in the future when we design with this part ?
Thank you~

Best regards,
Kyle

0 Alex Bhandari-Young over 8 years ago in reply to Kyle Chang27

TI__Mastermind 26345 points

Hi Kyle,

Can we move this over to email? Please send me an email at bhandari at ti.com

Best,

Alex

0 Kyle Chang27 over 8 years ago in reply to Alex Bhandari-Young

Prodigy 135 points

Dear Alex,

well, thanks for your help~

resolved my issue~

Best regards,

Kyle.

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OPT3001: Difficult to recognize the correct pin 1 directly.