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相关型号
SN74AHCT540NSE4 SN74AHCT540NSR SN74AHCT540NSRE4 SN74AHCT540NSRG4 SN74AHCT540PW SN74AHCT540PWE4 SN74AHCT540PWG4 SN74AHCT540PWR SN74AHCT540PWR TSSOP20 SN74AHCT540PWR(HB540)