DM74S280N
Rochester Electronics
74HC280FP-E
74HC280P-E
CD74ACT280M
74F280PC
SN74LS280N
SN74LS280DR
ICL8212CBA-TS2404
74180PC
SN74LS280D
74HC280FPEL-E
MC10160L
54180DM
74180DC
DM74AS280N
SN74AS280DR
SN74F280BD
Texas Instruments
DM74AS286MX
DM74AS286M
DM74AS280M