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參數(shù)資料
| 型號： | 74F158AFCX |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Quad 2-Input Multiplexer |
| 中文描述： | 四2輸入多路復(fù)用器 |
| 文件頁數(shù)： | 2/8頁 |
| 文件大?。?/td> | 152K |
| 代理商： | 74F158AFCX |
Unit Loading/Fan Out
54F/74F
Pin Names
Description
U.L.
Input I
IH
/I
IL
Output I
OH
/I
OL
HIGH/LOW
I
0a
–I
0d
I
1a
–I
1d
E
S
Z
a
–Z
d
Source 0 Data Inputs
Source 1 Data Inputs
Enable Input (Active LOW)
Select Input
Inverted Outputs
1.0/1.0
1.0/1.0
1.0/1.0
1.0/1.0
50/33.3
20
m
A/
b
0.6 mA
20
m
A/
b
0.6 mA
20
m
A/
b
0.6 mA
20
m
A/
b
0.6 mA
b
1 mA/20 mA
Functional Description
The ’F158A quad 2-input multiplexer selects four bits of
data from two sources under the control of a common Se-
lect input (S) and presents the data in inverted form at the
four outputs. The Enable input (E) is active LOW. When E is
HIGH, all of the outputs (Z) are forced HIGH regardless of
all other inputs. The ’F158A is the logic implementation of a
4-pole, 2-position switch where the position of the switch is
determined by the logic levels supplied to the Select input.
A common use of the ’F158A is the moving of data from two
groups of registers to four common output busses. The par-
ticular 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 ’F158A can generate four functions
of two variables with one variable common. This is useful for
implementing gating functions.
Truth Table
Inputs
Outputs
E
S
I
0
I
1
Z
H
L
L
L
L
X
L
L
H
H
X
L
H
X
X
X
X
X
L
H
H
H
L
H
L
H
e
HIGH Voltage Level
L
e
LOW Voltage Level
X
e
Immaterial
Z
n
e
E
c
(I
1n
S
a
I
0n
S)
Logic Diagram
TL/F/9484–4
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
2
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 74F158AFMQB | Quad 2-Input Multiplexer |
| 74F158AFMX | Quad 2-Input Multiplexer |
| 74F158ALCQB | Quad 2-Input Multiplexer |
| 74F158ALCX | Quad 2-Input Multiplexer |
| 74F158ALMQB | Quad 2-Input Multiplexer |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 74F158AFMQB | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Quad 2-Input Multiplexer |
| 74F158AFMX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Quad 2-Input Multiplexer |
| 74F158ALCQB | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Quad 2-Input Multiplexer |
| 74F158ALCX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Quad 2-Input Multiplexer |
| 74F158ALMQB | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Quad 2-Input Multiplexer |
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