These 74155 Decoder feature dual 1-line-to-4-line De-multiplexers with individual strobes and common binary-address inputs in a single 16-pin package. When both sections are enabled by the strobes, the common address inputs sequentially select and route associated input data to the appropriate output of each section.

The individual strobes permit activating or inhibiting each of the 4-bit sections as desired. Data applied to input C1 is inverted at its outputs and data applied at C2 is true through its outputs. The inverter following the C1 data input permits use as a 3-to-8-
line decoder, or 1-to-8-line De-multiplexer, without external gating. Input clamping diodes are provided on these circuits to minimize transmission-line effects and simplify system design.

74155 Decoder Features:-

■ Applications:
Dual 2-to-4-line decoder
Dual 1-to-4-line demultiplexer
3-to-8-line decoder
1-to-8-line demultiplexer
■ Individual strobes simplify cascading for decoding or demultiplexing larger words
■ Input clamping diodes simplify system design
■ Choice of outputs:
Totem-pole (DM74LS155)
Open-collector (DM74LS156)

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