AT89S52-24JR AT89S5224JU AT89S52-24JU AT89S52-24JU NEW AT89S52-24JU IC AT89S52-24JU original AT89S52-24JU PB FREE AT89S52-24JU SMD PLCC AT89S52-24JU(PROG) AT89S52-24JU(ROHS)