贴片直插SN74LS280M，SN74LS273H，SN74LS259D，SN74LS260N，4

贴插UPB74LS368D-T-M5M51004BP-25-UPB74LS280D-T-N

贴片直插DM54LS244J，DM74ALS32M，DM74AS280N，DM74LS00SJ

丝印M74LS280N M74LS279P M74LS273P M74LS266P M74LS259P