MC54/74F398

The MC54/74F398 is a high-speed quad 2-port register. MC54/74F398 will select four bits of data from either of two sources (Ports) under control of a common Select input (S). The selected data is transferred to a 4-bit output register synchronous with the LOW-to-HIGH transition of the Clock input (CP). The 4-bit Dtype output register is fully edge-triggered. The Data inputs (I0x, I1x) and Select input (S) must be stable only a setup time prior to and hold time after the LOW-to-HIGH transition of the Clock input for predictable operation. The MC54/74F398 has both Q and Q outputs.