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新FSDL0165R T80-75HCP ZXTP2012A N74F157AD R
丝印N74F157ADSOP3.9 N74ALS245A-1D-T N74AHCT08MPWREP
新8532-49L TDA3612N DG506ACJ 643646-3 N74F157A V
原装SN74LS245DWR N74F157A UPD65MC-757-5A4-G1 UPD62MC-747-5A4