SN74ALS640BDW
SN74ALS640BDWE4
SN74ALS640BDWG4
SN74ALS640BDWR
SN74ALS640BDWRE4
SN74ALS640BDWRG4
SN74ALS640BN
SN74ALS640BNE4
SN74ALS640BNS
SN74ALS640BNSE4