Logic Decoders and Demultiplexers from Lansdale Semiconductor, Inc.
Dual 2 to 4-Line Decoder/Demultiplexer -- 54LS156/E,F
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The Series 54LS/74LS Schottky TTL family features both Schottky-barrier-diode inputs and emitter inputs and utilizes full Schottky-barrier-diode clamping to achieve speeds comparable to Series 54/74 at one-fifth of the power. They retain the desirable features of, and are completely compatible with, most of the popular saturated logic circuits.