Datasheet 74ACT399PC Equivalent ( PDF ) - Register

74AC399 74ACT399 Quad 2-Port Register June 1988 Revised October 2000 74AC399 74ACT399 Quad 2-Port Register General Description The 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. Featu