SN74F251BN屬于集成電路（IC）的信號(hào)開(kāi)關(guān)多路復(fù)用器解碼器。由美國(guó)德州儀器公司制造生產(chǎn)的SN74F251BN信號(hào)開(kāi)關(guān)，多路復(fù)用器，解碼器邏輯型信號(hào)開(kāi)關(guān)、多路復(fù)用器和編碼器 IC 可用于對(duì)以數(shù)字格式表示數(shù)據(jù)的電信號(hào)進(jìn)行路由和選擇。這些器件與設(shè)計(jì)用于模擬信號(hào)的類(lèi)似產(chǎn)品有所不同，它們保留的信息表示為兩個(gè)電狀態(tài)之一，而不是兩個(gè)外部界限內(nèi)的無(wú)窮變化量。

? 3-State Versions of SN54F151B and

SN74F151B

? 3-State Outputs Interface Directly With

System Bus

? Performs Parallel-to-Serial Conversion

? Complementary Outputs Provide True and

Inverted Data

? Package Options Include Plastic

Small-Outline Packages, Ceramic Chip

Carriers, and Standard Plastic and Ceramic

300-mil DIPs

description

These data selectors/multiplexers contain full

binary decoding to select one of eight data

sources and feature strobe-controlled

complementary outputs. The 3-state outputs can

interface with and drive data lines of busorganized

systems. When the strobe (G) input is

high, both outputs are in a high-impedance state

in which both the upper and lower transistors of

each totem-pole output are off, and the output

neither drives nor loads the bus significantly.

The SN54F251B is characterized for operation

over the full military temperature range of ?55°C

to 125°C. The SN74F251B is characterized for

operation from 0°C to 70°C.