74AHC257 Просмотр технического описания (PDF) - Philips Electronics
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74AHC257 Datasheet PDF : 20 Pages
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Philips Semiconductors
Quad 2-input multiplexer; 3-state
Product specification
74AHC257;
74AHCT257
handbook, halfpage
S1
1I0 2
1I1 3
1Y 4
2I0 5
2I1 6
2Y 7
GND 8
16 VCC
15 OE
14 4I0
13 4I1
257
12 4Y
11 3I0
10 3I1
9 3Y
MNA536
Fig.1 Pin configuration.
handbook, halfpage 2 3 5 6 11 10 14 13
1I0 1I1 2I0 2I1 3I0 3I1 4I0 4I1
1
S
15 OE
1Y 2Y 3Y 4Y
4 7 9 12
MNA537
Fig.2 Logic symbol.
handbook, halfpage
1 G1
15
EN
2
1 MUX
4
3
1
5
7
6
11
9
10
14
12
13
MNA538
Fig.3 IEC logic symbol.
2000 Apr 03
handbook, halfpage
2 1I0
3 1I1
5 2I0
6 2I1
11 3I0
10 3I1
14 4I0
13 4I1
SELECTOR
S
1
1Y 4
2Y 7
3-STATE
MULTIPLEXER
OUTPUTS 3Y 9
4Y 12
OE
15
MNA540
Fig.4 Functional diagram.
4
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