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參數資料
| 型號： | MC74AC257D |
| 廠商： | MOTOROLA INC |
| 元件分類： | 通用總線功能 |
| 英文描述： | QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS |
| 中文描述： | AC SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDSO16 |
| 封裝： | PLASTIC, SOIC-16 |
| 文件頁數： | 1/8頁 |
| 文件大小： | 173K |
| 代理商： | MC74AC257D |
5-1
FACT DATA
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
S
3
4
5
6
7
VCC
9
8
OE
I0c
I1c
Zc
I0d
I1d
Zd
I0a
I1a
Za
I0b
I1b
Zb
GND
PIN NAMES
S
OE
I0a–I0d
I1a–I1d
Za–Zd
Common Data Select Input
3-State Output Enable Input
Data Inputs from Source 0
Data Inputs from Source 1
3-State Multiplexer Outputs
TRUTH TABLE
Output
Enable
Select
Input
Data
Inputs
Outputs
OE
S
I0
X
X
X
L
H
I1
X
L
H
X
X
Z
H
L
L
L
L
X
H
H
L
L
Z
L
H
L
H
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
QUAD 2-INPUT
MULTIPLEXER WITH
3-STATE OUTPUTS
N SUFFIX
CASE 648-08
PLASTIC
D SUFFIX
CASE 751B-05
PLASTIC
LOGIC SYMBOL
S
OE I0aI1aI0bI1b
Zb
I0cI1cI0dI1d
Za
Zc
Zd
相關PDF資料 |
PDF描述 |
|---|---|
| MC74AC257 | QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS |
| MC74ACT257 | QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS |
| MC74AC257N | QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS |
| MC74ACT257D | QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS |
| MC74ACT257N | QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MC74AC257DR2 | 功能描述:編碼器、解碼器、復用器和解復用器 2-6V Quad 2-Input RoHS:否 制造商:Micrel 產品:Multiplexers 邏輯系列:CMOS 位數: 線路數量（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 |
| MC74AC257DR2G | 功能描述:編碼器、解碼器、復用器和解復用器 2-6V Quad 2-Input Mux w/3-State Out RoHS:否 制造商:Micrel 產品:Multiplexers 邏輯系列:CMOS 位數: 線路數量（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 |
| MC74AC257DSC | 制造商: 功能描述: 制造商:undefined 功能描述: |
| MC74AC257DT | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Quad 2−Input Multiplexer with 3−State Outputs |
| MC74AC257DTR2 | 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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