TECHNICAL DATA IN74AC651 Octal 3-State Bus Transceivers and D Flip-Flops High-Speed Silicon-Gate CMOS The IN74AC651 is identical in pinout to the LS/ALS651, HC/HCT651.
The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LS/ALS outputs.
These devices consists of bus transceiver circuits, D-type flip-flop, and control circuitry arranged for multiplex transmission of data directly from the data bus or from the internal storage registers.
Direction and Output Enable are provided to select the read-time or stored data function.
Data on the A or B Data bus, or both, can be stored in the internal D flipflops by low-to-high transitions at th...

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