CD54AC139F3A

CD54AC139F3A description/ordering information

The ’AC139 devices are dual 2-line to 4-line decoders/demultiplexers designed for 1.5-V to 5.5-V VCC operation.These devices are designed to be used in high-performance memory-decoding or data-routing applicationsrequiring very short propagation delay times. In high-performance memory systems, these decoders can beused to minimize the effects of system decoding. When used with high-speed memories utilizing a fast enablecircuit, the delay times of these decoders and the enable time of the memory usually are less than the typicalaccess time of the memory. This means that the effective system delay introduced by the decoders is negligible.The active-low enable (G) input can be used as a data line in demultiplexing applications. Thesedecoders/demultiplexers feature fully buffered inputs, each of which represents only one normalized load to itsdriving circuit.ORDERING INFORMATION