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.
■ ICC reduced by 50%
■ Select inputs from two data sources
■ Fully positive edge-triggered operation
■ Outputs source/sink 24 mA
■ AC/ACT399 has TTL-compatible inputs