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SN74AHC157NS SN74AHC157NSR SN74AHC157NSRE4 SN74AHC157NSRG4 SN74AHC157PW SN74AHC157PWE4 SN74AHC157PWG4 SN74AHC157PWR SN74AHC157PWRE4 SN74AHC157PWRG3