AT80C51SND1C-UL AT80C52X2BIE-SLRUM AT80C52X2CUP-RL AT80C52X2CXJ-SLRUM AT80C52X2DDF-3CSUM AT80C52X2DGB-SLRZM AT80C52X2DGH-SLRZM AT80C52X2DGX-SLRUM AT80C52X2DKB-SLRUL AT80C52X2DNW-3CSUM