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參數(shù)資料
| 型號： | 74ACT253PCX |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Dual 4-Input Multiplexer with 3-STATE Outputs |
| 中文描述： | 雙路4輸入多路復(fù)用器與三態(tài)輸出 |
| 文件頁數(shù)： | 2/8頁 |
| 文件大?。?/td> | 99K |
| 代理商： | 74ACT253PCX |
www.fairchildsemi.com
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7
Functional Description
The AC/ACT253 contains two identical 4-input multiplexers
with 3-STATE outputs. They select two bits from four
sources selected by common Select inputs (S
0
, S
1
). The 4-
input multiplexers have individual Output Enable (OE
a
,
OE
b
) inputs which, when HIGH, force the outputs to a high
impedance (High Z) state. This device is the logic imple-
mentation of a 2-pole, 4-position switch, where the position
of the switch is determined by the logic levels supplied to
the two select inputs. The logic equations for the outputs
are shown:
Z
a
=
OE
a
(I
0a
S
1
S
0
+
I
1a
S
1
S
0
+
I
2a
S
1
S
0
+
I
3a
S
1
S
0
)
Z
b
=
OE
b
(I
0b
S
1
S
0
+
I
1b
S
1
S
0
+
I
2b
S
1
S
0
+
I
3b
S
1
S
0
)
If the outputs of 3-STATE devices are tied together, all but
one device must be in the high impedance state to avoid
high currents that would exceed the maximum ratings.
Designers should ensure that Output Enable signals to 3-
STATE devices whose outputs are tied together are
designed so that there is no overlap.
Truth Table
Address Inputs S
0
and S
1
are common to both sections.
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.
Select
Data Inputs
Output
Outputs
Inputs
Enable
S
0
S
1
I
0
I
1
I
2
I
3
OE
Z
X
X
X
X
X
X
H
Z
L
L
L
X
X
X
L
L
L
L
H
X
X
X
L
H
H
L
X
L
X
X
L
L
H
L
X
H
X
X
L
H
L
H
X
X
L
X
L
L
L
H
X
X
H
X
L
H
H
H
X
X
X
L
L
L
H
H
X
X
X
H
L
H
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 74AC253 | Dual 4-Input Multiplexer with 3-STATE Outputs |
| 74AC253SC | Dual 4-Input Multiplexer with 3-STATE Outputs |
| 74AC253PC | Dual 4-Input Multiplexer with 3-STATE Outputs |
| 74AC253SJ | Dual 4-Input Multiplexer with 3-STATE Outputs |
| 74AC299SCX_NL | 8-Input Universal Shift/Storage Register |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 74ACT253SC | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 Dl 4-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 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
| 74ACT253SC_Q | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 Dl 4-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 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
| 74ACT253SCX | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 Dl 4-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 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
| 74ACT253SJ | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 Dl 4-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 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
| 74ACT253SJ_Q | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 Dl 4-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 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
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