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參數(shù)資料
| 型號： | 74LCX257 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Low Voltage Quad 2-Input Multiplexer with 5V Tolerant Inputs and Outputs |
| 中文描述： | 低電壓四2輸入與5V容限輸入和輸出復(fù)用器 |
| 文件頁數(shù)： | 2/9頁 |
| 文件大?。?/td> | 100K |
| 代理商： | 74LCX257 |
www.fairchildsemi.com
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Functional Description
The LCX257 is a quad 2-input multiplexer with 3-STATE
outputs. It selects four bits of data from two sources under
control of a Common Data Select input. When the Select
input is LOW, the I
0x
inputs are selected and when Select
is HIGH, the I
1x
inputs are selected. The data on the
selected inputs appears at the outputs in true (non
inverted) form. The device 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.
The logic equations for the outputs are shown below:
Z
a
=
OE
(1
1a
S
+
I
0a
S)
Z
b
=
OE
(1
1b
S
+
I
0b
S)
Z
c
=
OE
(1
1c
S
+
I
0c
S)
Z
d
=
OE
(1
1d
S
+
I
0d
S)
When the Output Enable (OE) is HIGH, the outputs are
forced to a high impedance state. If the outputs are tied
together, all but one device must be in the high impedance
state to avoid high currents that would exceed the maxi-
mum ratings. Designers should ensure the Output Enable
signals to 3-STATE devices whose outputs are tied
together are designed so there is no overlap.
Truth Table
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
X
=
Immaterial
Z
=
High Impedance
Logic Diagram
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
Output
Select
Data
Outputs
Enable
Input
Inputs
OE
S
I
0
I
1
Z
H
X
X
X
Z
L
H
X
L
L
L
H
X
H
H
L
L
L
X
L
L
L
H
X
H
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 74LCX257MTCX | 2-Input Digital Multiplexer |
| 74LCX257MX | 2-Input Digital Multiplexer |
| 74LCX257SJX | 2-Input Digital Multiplexer |
| 74LCX27M | Low Voltage Triple 3-Input NOR Gate with 5V Tolerant Inputs |
| 74LCX27SJ | Low Voltage Triple 3-Input NOR Gate with 5V Tolerant Inputs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 74LCX257M | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 Qd 2-Inp Multiplexer RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
| 74LCX257M | 制造商:Fairchild Semiconductor Corporation 功能描述:IC DECODERS/ENCODERS/MULTIPLEXERS/DEMUL |
| 74LCX257M | 制造商:Fairchild Semiconductor Corporation 功能描述:74LCX CMOS SMD 74LCX257 SOIC16 |
| 74LCX257M_Q | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 Qd 2-Inp Multiplexer RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
| 74LCX257MTC | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 Qd 2-Inp Multiplexer RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
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