- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383562 > MC74AC253DR2 (ON SEMICONDUCTOR) Dual 4−Input Multiplexer with 3−State Outputs PDF資料下載
參數(shù)資料
| 型號(hào)： | MC74AC253DR2 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 通用總線功能 |
| 英文描述： | Dual 4−Input Multiplexer with 3−State Outputs |
| 中文描述： | AC SERIES, DUAL 4 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDSO16 |
| 封裝： | PLASTIC, SOIC-16 |
| 文件頁(yè)數(shù)： | 2/11頁(yè) |
| 文件大小： | 191K |
| 代理商： | MC74AC253DR2 |
MC74AC253, MC74ACT253
http://onsemi.com
2
TRUTH TABLE
Select
Inputs
Data Inputs
Output
Enable
Outputs
S
0
S
1
I
0
I
1
I
2
I
3
OE
Z
X
L
L
H
H
L
L
H
H
X
L
L
L
L
H
H
H
H
X
L
H
X
X
X
X
X
X
X
X
X
L
H
X
X
X
X
X
X
X
X
X
L
H
X
X
X
X
X
X
X
X
X
L
H
H
L
L
L
L
L
L
L
L
Z
L
H
L
H
L
H
L
H
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
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 (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 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:
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.
OE
b
I
3b
I
2b
I
1b
I
0b
S
0
S
1
I
3a
I
2a
Z
b
Z
a
I
1a
I
0a
OE
a
NOTE:
This diagram is provided only for the understanding of logic operations
and should not be used to estimate propagation delays.
Figure 3. Logic Diagram
Figure 2. Logic Symbol
S
0
S
1
OE
a
I
0a
I
1a
I
2a
I
3a
Z
a
Z
b
I
0b
I
1b
I
2b
I
3b
OE
b
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC74AC253DT | Dual 4−Input Multiplexer with 3−State Outputs |
| MC74AC253DTR2 | Dual 4−Input Multiplexer with 3−State Outputs |
| MC74AC253M | Dual 4−Input Multiplexer with 3−State Outputs |
| MC74AC253MEL | Dual 4−Input Multiplexer with 3−State Outputs |
| MC74ACT253DR2 | Dual 4−Input Multiplexer with 3−State Outputs |
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 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。