semiconductor KTK919S 2007. 2. 15 1/1 marking specification sot-23 package revision no : 0 1. marking method laser marking 2. marking m 1 2 0 1 1 no. item marking description device mark m1 KTK919S * lot no. 01 2006. 1st week note) * lot no. marking method lot no. description remark 01, 02 ....51, 52 01 : 2006. 1st week, 02 : 2006. 2nd week : 51 : 2006. 51th week, 52 : 2006. 52th week. rotation for 4 years : 01...52 : ...2006, 2010, 2014... 0a...5b : ...2007, 2011, 2015... j1...e2 : ...2008, 2012, 2016... ja...eb : ...2009, 2013, 2017... 0a, 0b ....5a, 5b 0a : 2007. 1st week, 0b : 2007. 2nd week : 5a : 2007. 51th week, 5b : 2007. 52th week. j1, j2 ....e1, e2 j1 : 2008. 1st week, j2 : 2008. 2nd week : e1 : 2008. 51th week, e2 : 2008. 52th week. ja, jb ....ea, eb ja : 2009. 1st week, jb : 2009. 2nd week : ea : 2009. 51th week, eb : 2009. 52th week. (a=1, b=2, c=3, d=4, e=5, f=6, g=7, h=8, i=9, j=0)
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