25LC640A-I/SN 25LC640A-I/ST 25LC640A-M/SN 25LC640AT-E/MNY 25LC640AT-E/MS 25LC640AT-E/SN 25LC640AT-E/SN16KV04 25LC640AT-E/SN16KV05 25LC640AT-E/SN16KV09 25LC640AT-E/SN16KV22