Other Parts Discussed in Thread: LM339,
Hi
We found that the physical marking of this product is inconsistent, and the internal construction is also inconsistent
Could you please confirm the reason
thank you
This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
The LM393P has several different assembly locations; see ti.com/material-attributes-search/?material=LM393P.
This information can be found on the TI shipping label.
Hello Yingjiao,
The top and left device, #31A5Q3M, leadframe and markings are consistent with the current standard. This device was assembled in TI Mexico in January 2023 using the "B" die and roughened NiPdAu finish.
For the bottom and right device #06W4YLF, the datecode is correct. This device was assembled by a Chinese subcontractor in June 2020 using the "classic" die and pure tin (E3) finish.
However, the leadframe does not match the *current* leadframe. Leadframes can change over the years - especially with subcontractors - so we are not too alarmed..
The dies are different. Are they seeing an operating issue?
The LM393 family is under PCN to change the die. Please see the LM339 family Appnote, section 2.1:
Application Design Guidelines for LM339, LM393, TL331 Family Comparators