The HCT139 devices are designed for high-performance memory-decoding or data-routing applications requiring very short propagation delay times. In high-performance memory systems, these decoders CAN minimize the effects of system decoding. When employed with high-speed Memories utilizing a fast enable circuit, the delay time of these decoders and the enable time of the memory usually are less than the typical access time of the memory. This means that the effective system delay introduced by the decoders is negligible. By Texas Instruments
SN54HCT139 's PackagesSN54HCT139 's pdf datasheet

SN54HCT139 Pinout, Pinouts
SN54HCT139 pinout,Pin out
This is one package pinout of SN54HCT139,If you need more pinouts please download SN54HCT139's pdf datasheet.

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