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參數(shù)資料
| 型號(hào)： | MC74AC253DR2 |
| 廠商： | MOTOROLA INC |
| 元件分類： | 編、解碼器及復(fù)用、解復(fù)用 |
| 英文描述： | AC SERIES, DUAL 4 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDSO16 |
| 封裝： | PLASTIC, SOIC-16 |
| 文件頁(yè)數(shù)： | 2/8頁(yè) |
| 文件大?。?/td> | 179K |
| 代理商： | MC74AC253DR2 |
MC74AC253 MC74ACT253
5-2
FACT DATA
FUNCTIONAL DESCRIPTION
The
MC74AC253/74ACT253
contains
two
identical
4-input multiplexers with 3-state outputs. They select two bits
from four sources selected by common Select inputs (S0, S1).
The 4-input multiplexers have individual Output Enable (OEa,
OEb) inputs which, when HIGH, force the outputs to a high
impedance (High Z) state. This device is the logic
implementation 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:
Za = OEa(I0aS1S0+I1aS1S0+
I2aS1S0+I3aS1S0)
Zb = OEb(I0bS1S0+I1bS1S0+
I2bS1S0+I3bS1S0)
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.
OEb
I3b
I2b
I1b
I0b
S0
S1
I3a
I2a
Zb
Za
I1a
I0a
OEa
Please note that this diagram is provided only for the understanding of logic
operations and should not be used to estimate propagation delays.
LOGIC DIAGRAM
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC74AC253DR2G | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 2-6V Dual 4-Input Mux w/3-State Out 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(shí)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 |
| MC74AC253DT | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Dual 4−Input Multiplexer with 3−State Outputs |
| MC74AC253DTR2 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Dual 4−Input Multiplexer with 3−State Outputs |
| MC74AC253M | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Dual 4−Input Multiplexer with 3−State Outputs |
| MC74AC253MEL | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Dual 4−Input Multiplexer with 3−State Outputs |
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