SN74LS40N
SN74LS422N
SN74LS423D
SN74LS423DE4
SN74LS423DG4
SN74LS423DR
SN74LS423DRE4
SN74LS423DRG4
SN74LS423N
SN74LS423NE4
19129491934(手机优先微信同号)