MC74VHC1G08DFT MC74VHC1G08DFT1 MC74VHC1G08DFT1G MC74VHC1G08DFT1G-L22038 MC74VHC1G08DFT1G-Q MC74VHC1G08DFT2 MC74VHC1G08DFT2 IC MC74VHC1G08DFT2G MC74VHC1G08DFT2G 逻辑IC MC74VHC1G08DFT2G-F22038