LP5907: Valid Marking

Renan Santos Adriano

Mastermind 20300 points

Part Number: LP5907

Hi Team,

My Customer applied for a sample for LP5907A33YKMR and received the chip with marking H5 (picture below), but on our datasheet, it shows that the part marking should be N. Can you advise if information about this? Is it valid? And He also wanted to know how to check the PIN 1 since there is no marking on the chip.

Thanks in advance.

Regards,

-Renan

over 5 years ago

0 Min Hudgins over 5 years ago

TI__Prodigy 515 points

Hi Renan:

I'm investigating the top marking issue. For the TI part, the Pin 1 is marked in the Ball A1 corner, shown in the YKM package outline in the datasheet.

Regards,

Min

0 Renan Santos Adriano over 5 years ago in reply to Min Hudgins

TI__Mastermind 20300 points

Hi Min,

Thank you for your reply. Unfortunately, I proposed this answer to my customer but he is still having a hard time locating this using the picture above.

Can you help me on locating PIN1 this using the image?

Appreciated your help.

Regards,

-Renan

0 Min Hudgins over 5 years ago in reply to Renan Santos Adriano

TI__Prodigy 515 points

Hi Renan:

Please see picture for the Pin 1 top side marking. The symbol shown on your customer's part doesn't match TI's.

Regards,

Min

0 Jason Song over 5 years ago in reply to Min Hudgins

TI__Mastermind 23361 points

Hi Renan,

For some of the package, some of the pin 1 marking may be at the bottom of the device. I would suggest to ask your customer check on the back of the chip as well.

Regards,
Jason

0 Blake Soileau over 5 years ago in reply to Jason Song

TI__Intellectual 1200 points

Renan,

The topside marking for LP5907 is a 1 digit marking (N) along with a 1 character date code marking. There are a few places you can look this up including the Package addendum on the datasheet (page 21 in this case) and the part marking lookup tool (see link below).

Looking at the symbol in the image, I do not recognize the pin1 marking type. Let's connect via e-mail to further address these questions and concerns from the customer.

http://www.ti.com/lit/ds/symlink/lp5907.pdf

http://www.ti.com/packaging/docs/partlookup.tsp

0 laisan zhang over 5 years ago in reply to Blake Soileau

Intellectual 315 points

Hi,

I have the same problem, can't confirm PIN A1/A2/B1/B2? picture as follows, please help to confim,thanks.

0 Blake Soileau over 5 years ago in reply to laisan zhang

TI__Intellectual 1200 points

Iaisan,

The pin1 marking (ie pin A1) is the solid dot located in the bottom left on the unit in the image provided. This would mean A1=bottom left, A2=bottom right, B1=top left, B2=top right

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LP5907: Valid Marking