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74HC257D Datenblatt(PDF) 4 Page - NXP Semiconductors

Teilenummer 74HC257D
Bauteilbeschribung  Quad 2-input multiplexer 3-state
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Hersteller  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74HC257D Datenblatt(HTML) 4 Page - NXP Semiconductors

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1998 Sep 30
4
Philips Semiconductors
Product specification
Quad 2-input multiplexer; 3-state
74HC/HCT257
Fig.4 Functional diagram.
MGR280
S
1
1I0
2
1Y
4
1I1
3
SELECTOR
3-STATE MULTIPLEXER OUTPUTS
2I0
5
2Y
7
2I1
6
3I0
11
3Y
12
3I1
10
4I0
14
4Y
9
4I1
13
OE
15
FUNCTION TABLE
Notes
1. H = HIGH voltage level
L = LOW voltage level
X = don’t care
Z = high impedance OFF-state
INPUTS
OUTPUT
OE
S
nI0
nI1
nY
H
XXX
Z
LH
X
L
L
L
HXH
H
LLL
X
L
LL
H
X
H
Fig.5 Logic diagram.


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