The ALS139 are dual 2-line to 4-line decoders/demultiplexers SN54ALS139 SN74ALS139 designed for use in high-performance memory-decoding or data- routing applications requiring very short propagation delay times. In high-performance memory systems, these devices CAN minimize the effects of system decoding. When employed with high-speed Memories utilizing a fast-enable circuit, the delay times of these decoders and the enable time of the memory are usually less than the typical access time of the memory. Therefore, the effective system delay introduced by the Schottky-clamped system decoder is negligible. The ALS139 comprise two individual 2-line to 4-line decoders in a single package. The active-low enable (G) input CAN be used as a data line in demultiplexing applications. These decoders/demultiplexers feature fully buffered inputs, each of which represents only one normalized load to its driving circuit. All inputs are clamped with high-performance Schottky Diodes to suppress line ringing and simplify system design. The SN54ALS139 is characterized for operation over the full military temperature range of 55C to 125C. The SN74ALS139 is characterized for operation from 0C to 70C. By Texas Instruments
Part Manufacturer Description Datasheet Samples
SN54ALS139J Texas Instruments Dual 2-Line To 4-Line Decoders/Demultiplexers 16-CDIP -55 to 125
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SN54ALS139 Pinout, Pinouts
SN54ALS139 pinout,Pin out
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