SN74HC640PWRG4规格参数
相关型号
SN74HC640PWT SN74HC640PWTE4 SN74HC640PWTG4 SN74HC645DW SN74HC645DWE4 SN74HC645DWG4 SN74HC645DWR SN74HC645DWRE4 SN74HC645DWRG4 SN74HC645N