AT29LV040A-12TI AT29LV040A-15JC AT29LV040A-15JI AT29LV040A-15JU AT29LV040A-15JU-T AT29LV040A-15JU内存芯片 AT29LV040A-15TC AT29LV040A-15TI AT29LV040A-15TU AT29LV040A-15TU-T