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74HC257 Arkusz danych(PDF) 4 Page - NXP Semiconductors

Numer części 74HC257
Szczegółowy opis  Quad 2-input multiplexer; 3-state
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Strona internetowa  http://www.nxp.com
Logo NXP - NXP Semiconductors

74HC257 Arkusz danych(HTML) 4 Page - NXP Semiconductors

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74HC_HCT257_5
© NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 05 — 13 January 2010
4 of 17
NXP Semiconductors
74HC257; 74HCT257
Quad 2-input multiplexer; 3-state
5.
Pinning information
5.1 Pinning
5.2 Pin description
6.
Functional description
6.1 Function table
[1]
H = HIGH voltage level; L = LOW voltage level; X = don’t care; Z = high-impedance OFF-state.
Fig 5.
Pin configuration DIP16, SO16, SSOP16 and TSSOP16
74HC257
74HCT257
S
VCC
1I0
OE
1I1
4I0
1Y
4I1
2I0
4Y
2I1
3I0
2Y
3I1
GND
3Y
001aad499
1
2
3
4
5
6
7
8
10
9
12
11
14
13
16
15
Table 2.
Pin description
Symbol
Pin
Description
S
1
common data select input
1I0 to 4I0
2, 5, 11, 14
data input from source 0
1I1 to 4I1
3, 6, 10, 13
data input from source 1
1Y to 4Y
4, 7, 9, 12
3-state multiplexer output
GND
8
ground (0 V)
OE
15
3-state output enable input (active LOW)
VCC
16
supply voltage
Table 3.
Function table[1]
Control
Input
Output
OE
S
nl0
nl1
nY
H
X
X
X
Z
L
H
X
L
L
L
H
X
H
H
L
L
L
X
L
L
L
H
X
H


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