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1 M74HCTXXXB1R HCT157 QUAD 2 CHANNEL MULTIPLEXER HCT158 QUAD 2 CHANNEL MULTIPLEXER (INV) 256K ST 5132512
2 M74HCTXXXB1R HCT157 QUAD 2 CHANNEL MULTIPLEXER HCT158 QUAD 2 CHANNEL MULTIPLEXER (INV) 256K ST 4967899
3 M74HCTXXXB1R OCTAL D-TYPE LATCH WITH 3 STATE OUTPUT HCT563 INVERTING - HCT573 NON INVERTING 275K ST 4020750