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1 M74HC74B1R DUAL D TYPE FLIP FLOP WITH PRESET AND CLEAR 256K ST 4266660
2 M74HC74B1R DUAL D TYPE FLIP FLOP WITH PRESET AND CLEAR 464K ST 4266659
3 M74HC74B1R DUAL D TYPE FLIP FLOP WITH PRESET AND CLEAR 256K ST 4266658