20 PIECES TC51V4260BFTLL80 TOSHIBA
TSSOP-44/40
256Kx16   DRAM
 NOS ON CUT TAPE
https://www.datasheetarchive.com/pdf/download.php?id=02ef1665f5d9d49e2dcd59e4c2b5cbfd8f119d&type=O&term=TC51V4260