參數(shù)資料
型號: 74LVX157SJ
廠商: Fairchild Semiconductor
文件頁數(shù): 2/7頁
文件大?。?/td> 0K
描述: MULTIPLEXER QUAD 2IN LV 16SOP
標(biāo)準(zhǔn)包裝: 47
系列: 74LVX
類型: 多路復(fù)用器
電路: 4 x 2:1
獨立電路: 1
輸出電流高,低: 4mA,4mA
電壓電源: 單電源
電源電壓: 2 V ~ 3.6 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 16-SOIC(0.209",5.30mm 寬)
供應(yīng)商設(shè)備封裝: 16-SOP
包裝: 管件
www.fairchildsemi.com
2
74
L
VX157
Truth Table
H
= HIGH Voltage Level
L
= LOW Voltage Level
X
= Immaterial
Functional Description
The LVX157 is a quad 2-input multiplexer. It selects four
bits of data from two sources under the control of a com-
mon Select input (S). The Enable input (E) is active-LOW.
When E is HIGH, all of the outputs (Z) are forced LOW
regardless of all other inputs. The LVX157 is the logic
implementation of a 4-pole, 2-position switch where the
position of the switch is determined by the logic levels sup-
plied to the Select input. The logic equations for the outputs
are shown below:
Za = E (I1a S + I0a S)
Zb = E (I1b S + I0b S)
Zc = E (I1c S + I0c S)
Zd = E (I1d S + I0d S)
A common use of the LVX157 is the moving of data from
two groups of registers to four common output busses. The
particular register from which the data comes is determined
by the state of the Select input. A less obvious use is as a
function generator. The LVX157 can generate any four of
the sixteen different functions of two variables with one
variable common. This is useful for implementing gating
functions.
Logic Diagram
Inputs
Outputs
E
SI0
I1
Z
HX
X
L
LH
X
L
LH
X
H
LL
L
X
L
LL
H
X
H
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