74ALS157 Просмотр технического описания (PDF) - Philips Electronics
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74ALS157 Datasheet PDF : 9 Pages
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Philips Semiconductors
Data selector/multiplexer
Product specification
74ALS157/74ALS158
IEC/IEEE SYMBOL – 74ALS157
1
G1
15
EN
2
MUX
1
3
1
5
6
11
10
14
13
4
7
9
12
SC00055
LOGIC DIAGRAM – 74ALS157
E I0a I1a I0b I1b
15 2
3
5
6
I0c I1c I0d I0d S
11
10 14
13 1
IEC/IEEE SYMBOL – 74ALS158
1
G1
15
EN
2
MUX
1
3
1
5
6
11
10
14
13
4
7
9
12
SC00056
LOGIC DIAGRAM – 74ALS158
E I0a I1a I0b I1b
15 2
3
5
6
I0c I1c I0d I0d S
11
10 14
13 1
4
7
9
Ya
Yb
Yc
VCC = Pin 16
GND = Pin 8
FUNCTION TABLE – 74ALS157
INPUTS
E
S
I0n
I1n
H
X
X
X
L
L
L
X
L
L
H
X
L
H
X
L
L
H
X
H
H = High voltage level
L = Low voltage level
X = Don’t care
12
Yd
SC00057
OUTPUTS
Yn
L
L
H
L
H
4
7
9
Ya
Yb
Yc
VCC = Pin 16
GND = Pin 8
FUNCTION TABLE – 74ALS158
INPUTS
E
S
I0n
I1n
H
X
X
X
L
L
L
X
L
L
H
X
L
H
X
L
L
H
X
H
H = High voltage level
L = Low voltage level
X = Don’t care
12
Yd
SC00058
OUTPUTS
Yn
H
H
L
H
L
1991 Feb 08
3
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