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SN74ALS639AN/SN74ALS640B-1DW/SN74ALS640B-1DWR
SN74ALS639AN SN74ALS640B-1DW SN74ALS640B-1DWR
SN74ALS621AN | SN74ALS623AN | SN74ALS640BN
SN74ALS574ANSN74LS377NSN74LS
全新SN74ALS639AN SN74ALS640B-1N SN74ALS640B-1NSR原装
TLC0820AIN TLC7528EN SN74ALS561AN SN74ALS569AN SN74AS640N
