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參數資料
| 型號： | 54ACT251FMX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 編、解碼器及復用、解復用 |
| 英文描述： | ACT SERIES, 8 LINE TO 1 LINE MULTIPLEXER, COMPLEMENTARY OUTPUT, CDFP16 |
| 封裝： | CERAMIC, FP-16 |
| 文件頁數： | 2/8頁 |
| 文件大小： | 172K |
| 代理商： | 54ACT251FMX |
Functional Description
This device is a logical implementation of a single-pole
8-position switch with the switch position controlled by the
state of three Select inputs S0 S1 S2 Both true and com-
plementary outputs are provided The Output Enable input
(OE) is active LOW When it is activated the logic function
provided at the output is
Z e OE
(I0 S0 S1 S2 a I1 S0 S1 S2 a
I2 S0 S1 S2 a I3 S0 S1 S2 a
I4 S0 S1 S2 a I5 S0 S1 S2 a
I6 S0 S1 S2 a I7 S0 S1 S2)
When the Output Enable is HIGH both outputs are in the
high impedance (High Z) state This feature allows multi-
plexer expansion by tying the outputs of up to 128 devices
together When the outputs of the TRI-STATE devices are
tied together all but one device must be in the high imped-
ance state to avoid high currents that would exceed the
maximum ratings The Output Enable signals should be de-
signed to ensure there is no overlap in the active-LOW por-
tion of the enable voltages
Truth Table
Inputs
Outputs
OE
S2
S1
S0
Z
H
XXX
Z
L
LLL
I0
LL
L
H
I1
L
LHL
I2
LL
H
I3
LH
L
I4
L
HLH
I5
LH
H
L
I6
L
HHH
I7
H e HIGH Voltage Level
L e LOW Voltage Level
X e Immaterial
Z e High Impedance
Logic Diagram
TLF9945 – 5
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays
2
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相關代理商/技術參數 |
參數描述 |
|---|---|
| 54ACT251L | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:8-Input Multiplexer with TRI-STATE Output |
| 54ACT251LMQB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Input Digital Multiplexer |
| 54ACT2525FMQB | 制造商:National Semiconductor Corporation 功能描述:Clock Fanout Buffer 8-OUT 制造商:National Semiconductor 功能描述:Clock Fanout Buffer 8-OUT |
| 54ACT253 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Dual 4-Input Multiplexer with TRI-STATE Outputs |
| 54ACT253D | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Dual 4-Input Multiplexer with TRI-STATE Outputs |
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