SN74ALS155
DUAL 2-LINE TO 4-LINE DECODER/DEMULTIPLEXER
SDAS140 — NOVEMBER 1987

features

• Applications:
  Dual 2-Line to 4-Line Decoder
  Dual 1-Line to 4-Line Demultiplexer
  3-Line to 8-Line Decoder
  1-Line to 8-Line Demultiplexer
• Individual Strobes Simplify Cascading For Decoding or Demultiplexing Larger Words
• Package Options Include Plastic "Small Outline" Packages and Standard Plastic 300-mil DIPs

description

The ´ALS155 circuits feature dual 1-line to 4-line demultiplexers with individual strobes and common binary-address inputs in a single 16-pin package. When both sections are enabled, the common binary-address inputs sequentially select and route associated input data to the appropriate output of each section. The individual strobes permit enabling or disabling each of the 4-bit sections as desired.

Data applied to input 1C is inverted at its outputs and data applied at input 2C\ is not inverted through its outputs. The inverter following the 1C data input permits use of the ´ALS155 as a 3-line to 8-line demultiplexer without external gating. All inputs are clamped with high-performance Schottky diodes to suppress line ringing and simplify system design.

The SN74ALS155 is characterized for operation from 0°C to 70°C.