54LS139 - National Semiconductor

54LS139 (54LS138 / 54LS139) Decoders/Demultiplexers

These Schottky-clamped circuits are 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 used with high-speed memories the delay times of these decoders are usually less tha.

Features

Y Y Y Y Y Y Y Designed specifically for high speed Memory decoders Data transmission systems LS138 3-to-8-line decoders incorporates 3 enable inputs to simplify cascading and or data reception LS139 contains two fully independent 2-to-4-line decoders demultiplexers Schottky clamped for high performance Typical propagation delay (3 levels of logic) LS138 21 ns LS139 21 ns Typical power dissipation LS138 32 mW LS139 34 mW Alternate Military Aerospace devices (54LS138 54LS139) are available Contact a National Semiconductor Sales Office Distributor for specifications Connection Diagrams Dua.