Octal Bus Transceiver/Register With 3-STATE Outputs

The 74ACT646 consist of registered Bus Transceiver circuits, with outputs, D-type Flip-Flops and control circuitry providing multiplexed transmission of data directly from the input bus or from the internal storage Registers Data on the A or B bus will be loaded into the respective Registers on the LOW-to-HIGH transition of the appropriate Clock pin (CPAB or CPBA). The four fundamental data handling functions available are illustrated in Figures 1, 2, 3, and Figure 4.
By Fairchild Semiconductor