74AC399 Quad 2-Port Register

The FAIRCHILD SEMICONDUCTOR AC/ACT399 is the logical equivalent of a quad 2-input multiplexer feeding into four edge-triggered flip-flops. A common Select input determines which of the two 4-bit words is accepted. The selected data enters the flip-flop on the rising edge of the clock.

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74AC399	74AC399PC	74AC399SC