SN74HC21NS规格参数
相关型号
SN74HC21NSR SN74HC21NSRE4 SN74HC21NSRG4 SN74HC21PW SN74HC21PWE4 SN74HC21PWG4 SN74HC21PWR SN74HC21PWRE4 SN74HC21PWRG4 SN74HC21PWT