SN74LS221DRG4规格参数
相关型号
SN74LS221N SN74LS221N3 SN74LS221NE4 SN74LS221NG4 SN74LS221NS SN74LS221NSR SN74LS221NSRE4 SN74LS221NSRG4 SN74LS224A SN74LS224AN