SN74ALS156屬于集成電路（IC）的信號開關(guān)多路復(fù)用器解碼器。由美國德州儀器公司制造生產(chǎn)的SN74ALS156信號開關(guān)，多路復(fù)用器，解碼器邏輯型信號開關(guān)、多路復(fù)用器和編碼器 IC 可用于對以數(shù)字格式表示數(shù)據(jù)的電信號進行路由和選擇。這些器件與設(shè)計用于模擬信號的類似產(chǎn)品有所不同，它們保留的信息表示為兩個電狀態(tài)之一，而不是兩個外部界限內(nèi)的無窮變化量。

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 (D) Packages and Standard

Plastic (N) 300-mil DIPs

description

One of the main applications of the SN74ALS156 is as a dual 1-line to 4-line decoder/demultiplexer with

individual strobes (G) 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 SN74ALS156 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 SN74ALS156 is characterized for operation from 0°C to 70°C.