SN74LS27NSR
SN74LS27NSRE4
SN74LS27NSRG4
SN74LS27NSRSOP5.2
SN74LS280D
SN74LS280DE4
SN74LS280DG4
SN74LS280DR
SN74LS280DRE4
SN74LS280DRG4