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參數(shù)資料
| 型號(hào)： | MC74AC157NG |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 通用總線功能 |
| 英文描述： | Quad 2-Input Multiplexer |
| 中文描述： | AC SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDIP16 |
| 封裝： | LEAD FREE, PLASTIC, DIP-16 |
| 文件頁(yè)數(shù)： | 2/10頁(yè) |
| 文件大小： | 117K |
| 代理商： | MC74AC157NG |
MC74AC157, MC74ACT157
http://onsemi.com
2
Figure 2. Logic Symbol
S
E
I
0a
I
1a
I
0b
I
1b
Z
b
I
0c
I
1c
I
0d
I
1d
Z
a
Z
c
Z
d
FUNCTIONAL DESCRIPTION
The MC74AC157/74ACT157 is a quad 2input
multiplexer. It selects four bits of data from two sources
under the control of a common Select input (S). The Enable
input (E) is activeLOW. When E is HIGH, all of the outputs
(Z) are forced LOW regardless of all other inputs. The
MC74AC157/74ACT157 is the logic implementation of a
4pole, 2position switch where the position of the switch
is determined by the logic levels supplied to the Select input.
The logic equations for the outputs are shown below:
Z
a
= E
(I
1a
S+I
0a
S)
Z
b
= E
(I
1b
S+I
0b
S)
Z
c
= E
(I
1c
S+I
0c
S)
Z
d
= E
(I
1d
S+I
0d
S)
A common use of the MC74AC157/74ACT157 is the
moving of data from two groups of registers to four common
output busses. The particular register from which the data
comes is determined by the state of the Select input. A less
obvious
use
is
as
a
MC74AC157/74ACT157 can generate any four of the
sixteen different functions of two variables with one
variable common. This is useful for implementing gating
functions.
function
generator.
The
Figure 3. Logic Diagram
I
0a
I
1a
I
0b
I
1b
I
0c
I
1c
I
0d
I
1d
E
S
Z
a
NOTE:
This diagram is provided only for the understanding of logic
operations and should not be used to estimate propagation delays.
Z
b
Z
c
Z
d
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC74ACT157DG | Quad 2-Input Multiplexer |
| MC74ACT157DR2 | Quad 2-Input Multiplexer |
| MC74ACT157DR2G | Quad 2-Input Multiplexer |
| MC74ACT157DT | Quad 2-Input Multiplexer |
| MC74ACT157DTR2 | Quad 2-Input Multiplexer |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC74AC158D | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:ON Semiconductor 功能描述: |
| MC74AC158N | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:QUAD 2-INPUT MULTIPLEXER |
| MC74AC160D | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MC74AC160DR2 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MC74AC160N | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:ON Semiconductor 功能描述: |
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