SN74LS257BD
SN74LS257BDE4
SN74LS257BDG4
SN74LS257BDR
SN74LS257BDR2
SN74LS257BDRE4
SN74LS257BDRG4
SN74LS257BJ
SN74LS257BN
SN74LS257BNE4