SN74ALS640B1DW
SN74ALS640B-1DW
SN74ALS640B-1DWE4
SN74ALS640B-1DWG4
SN74ALS640B-1DWR
SN74ALS640B-1DWRE4
SN74ALS640B-1DWRG4
SN74ALS640B-1N
SN74ALS640B-1NE4
SN74ALS640B-1NS