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LM8300: Part marking decode.

Part Number: LM8300

I need to decode the markings on the LM8300IMT9B/NOPB Touch Screen Controller.  The parts have two lines of marking with the second being the PN.  The first line has either a 2BAHCSUG3 or a 67AVNXUG3.  They do not seem to follow TI convention.  I am most interested in the date code but would like to understand the entire string.

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