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參數(shù)資料
| 型號： | MC74ACT257DR |
| 廠商： | MOTOROLA INC |
| 元件分類： | 編、解碼器及復(fù)用、解復(fù)用 |
| 英文描述： | ACT SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDSO16 |
| 封裝： | PLASTIC, SOIC-16 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大小： | 173K |
| 代理商： | MC74ACT257DR |
5-1
FACT DATA
Quad 2Input Multiplexer
with 3State Outputs
The MC74AC257/74ACT257 is a quad 2-input multiplexer with 3-state outputs.
Four bits of data from two sources can be selected using a Common Data Select
input. The four outputs present the selected data in true (noninverted) form. The
outputs may be switched to a high impedance state by placing a logic HIGH on
the common Output Enable (OE) input, allowing the outputs to interface directly
with bus-oriented systems.
Multiplexer Expansion by Tying Outputs Together
Noninverting 3-State Outputs
Outputs Source/Sink 24 mA
′ACT257 Has TTL Compatible Inputs
15
16
14
13
12
11
10
2
1
3
4
5
6
7
VCC
9
8
OE
I0c
I1c
Zc
I0d
I1d
Zd
S
I0a
I1a
Za
I0b
I1b
Zb
GND
PIN NAMES
S
Common Data Select Input
OE
3-State Output Enable Input
I0a–I0d
Data Inputs from Source 0
I1a–I1d
Data Inputs from Source 1
Za–Zd
3-State Multiplexer Outputs
TRUTH TABLE
Output
Enable
Select
Input
Data
Inputs
Outputs
OE
S
I0
I1
Z
H
X
Z
L
H
X
L
H
X
H
L
X
L
H
X
H
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
MC74AC257
MC74ACT257
QUAD 2-INPUT
MULTIPLEXER WITH
3-STATE OUTPUTS
N SUFFIX
CASE 648-08
PLASTIC
D SUFFIX
CASE 751B-05
PLASTIC
LOGIC SYMBOL
S
OE I0a I1a I0b I1b
Zb
I0c I1c I0d I1d
Za
Zc
Zd
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC74ACT257DR2 | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 5V Dual 4-Input 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 |
| MC74ACT257DR2G | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 5V Dual 4-Input 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 |
| MC74ACT257DT | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Quad 2−Input Multiplexer with 3−State Outputs |
| MC74ACT257DTR2 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Quad 2−Input Multiplexer with 3−State Outputs |
| MC74ACT257M | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Quad 2−Input Multiplexer with 3−State Outputs |
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