ECG74HC4060 可代换型号如下:ECG74HC4060 MC74HC4060N SK7C4060
ECG75492B 可代换型号如下:75492PC 9664PC DS75492N ECG75492B NTE75492B SN75492N TCG75492B
ECG778SM可以代换型号如下:BM558F ECG778SM MC4558CD NJM4558M NJM4558M-TE2 NTE778SM SK10061
ECG809可以代换型号如下:15-39208-1 66F176-1 66F1761 ECG809 NTE809 RG604 RG604T SK7727 TM809