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Part Number: SN74HC04DR
您好
从丝印判断,带G4的应该是SN74HC04DRG4,带G3的应该是SN74HC04DRG3,
二者区别只是引脚镀层不同,SN74HC04DRG4为NiPdAu(镍钯金),SN74HC04DRG3为Sn(锡)。
二者都是对应SN74HC04DR型号的,功能上完全一样,不影响使用。