Why aren't my parts consistent with TI Part Marking Lookup?

When checking Texas Instruments parts’ top markings, you can use the TI Part Marking Lookup. But sometimes the part’s marking may be inconsistent with the TI Part marking lookup. Some people may wonder if their part is correct.

If you have any questions, you should first check the datasheet to see if there are any notes related to the part marking information. For example, the datasheet for INA126UA shows Note 4 and 5 in the orderable information section.

(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.

(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a “~” will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device.