Date code explaination

what does this date code mean 1918+5
I get the YY/MM what is the +5

In general the +5 would be an indication of day or week. Since you have 1918+5 I would say this is the 5th day of the 18th week of 2019. If you have a part number we could see if they mention on the datasheet or check with the product manager.

296-1133-1-ND date code 1127+5
I grabbed the wrong example the first time

Ok so disregard my earlier comment. For this TI part you are looking at YYWW and +5 is calling out an extended 5 year shelf life.

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