K89542QF2 KB9S42QF2 KB9542QF2 KB9542QF2 KB9542QF2 KB9542QF 2 (old version KB9542Q C 9542QE QD QFP128 TQFP128 IC. Model Number: 1pcs NEW KB9542QF2 KB9542QF 2. Or :1pcs KB9542QG. Or: 1pcsKB9542QG QFP. Thus, in order to avoid quality problem, we suggest that you put them inside a baking chamber for at least 24 hours at 100℃-110℃。. ).