Applications:

Dual 2-to 4-Line Decoder

Dual 1-to 4-Line Demuiltiplexer

3-to 8-Line Decoder

1-to 8-Line Demultiplexer
Individual Strobes Simplify Cascading for
Decoding or Demuitiplexing Larger Words
Input Clamping Diodes Simplify System
Design
Choice of Outputs:

Totem Pole (“155, 'LS155A)

Open-Collector ("156, ‘LS 156)

description

These monolithic transistor-transistor-logic (TTL) cir-
cuits 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 by the strobes, the common binary-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
1C is inverted at its outputs and data applied at 2Cis
not inverted through its outputs. The inverter fol-
lowing the 1C data input permits use as a 3-to-8-line
decoder or 1-to-8-line demultiplexer without external
gating. Input clamping diodes are provided on all of
these circuits to minimize transmission-line effects
and simplify system design.