SN74HC540PW规格参数
相关型号
SN74HC540PWE4 SN74HC540PWG4 SN74HC540PWR SN74HC540PWRE4 SN74HC540PWRG4 SN74HC540PWT SN74HC540PWTE4 SN74HC540PWTG4 SN74HC541AN SN74HC541ANS