74ALS257 查看數據表（PDF） - Philips Electronics
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产品描述 (功能)
比赛名单
74ALS257 Datasheet PDF : 11 Pages
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Philips Semiconductors
Data selector/multiplexer
Product specification
74ALS257/74ALS258
LOGIC SYMBOL – 74ALS257
2 3 5 6 11 10 14 13
LOGIC SYMBOL – 74ALS258
2 3 5 6 11 10 14 13
I0a I1a I0b I1b I0c I1c I0d I1d
1
S
15
OE
Ya Yb Yc Yd
I0a I1a I0b I1b I0c I1c I0d I1d
1
S
15
OE
Ya Yb Yc Yd
VCC = Pin 16
GND = Pin 8
4 7 9 12
SF00674
IEC/IEEE SYMBOL – 74ALS257
15
EN
1
G1
2
MUX
1
3
1
5
6
10
11
13
14
4
7
9
12
SF00675
LOGIC DIAGRAM – 74ALS257
OE I0a I1a I0b I1b I0c I1c I0d I1d S
15 2
3
5
6
11 10 14 13 1
VCC = Pin 16
GND = Pin 8
4 7 9 12
SC00080
IEC/IEEE SYMBOL – 74ALS258
15
EN
1
G1
2
MUX
1
3
1
5
6
10
11
13
14
4
7
9
12
SC00081
LOGIC DIAGRAM – 74ALS258
OE I0a I1a I0b I1b I0c I1c I0d I1d S
15 2
3
5
6
11 10 14 13 1
4
7
9
12
VCC = Pin 16
Ya
Yb
Yc
Yd
GND = Pin 8
SC00082
4
7
9
12
VCC = Pin 16
Ya
Yb
Yc
Yd
GND = Pin 8
SC00083
1991 Feb 08
3
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