The F138 is designed to be used in high-performance memory-decoding or data- routing applications requiring very short propagation delay times. In high-performance memory systems, these decoders CAN be used to minimize the effects of system decoding. When employed with high-speed Memories utilizing a fast enable circuit, the delay times of this decoder and the enable time of the memory are usually less than the typical access time of the memory. This means that the effective system delay introduced by the decoder is negligible. The conditions at the binary-select inputs and the three enable inputs select one of eight output lines. Two active-low and one active-high enable inputs reduce the need for external Gates or inverters when expanding. A 24-line decoder CAN be implemented without external inverters and a 32-line decoder requires only one inverter. An enable input CAN be used as a data input for demultiplexing applications. The SN54F138 is characterized for operation over the full military temperature range of 55C to 125C. The SN74F138 is characterized for operation from 0C to 70C. By Texas Instruments
Part Manufacturer Description Datasheet Samples
SN54F138J Texas Instruments 3-Line To 8-Line Decoders/Demultiplexers 16-CDIP -55 to 125
SN54F138 's PackagesSN54F138 's pdf datasheet

SN54F138 Pinout, Pinouts
SN54F138 pinout,Pin out
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