參數(shù)資料
型號(hào): I74F257AD
廠商: NXP Semiconductors N.V.
元件分類: 通用總線功能
英文描述: Quad 2-line to 1-line selector-multiplexer, non-inverting (3-State)
封裝: I74F257AD<SOT109-1 (SO16)|<<http://www.nxp.com/packages/SOT109-1.html<1<week 6, 2004,;I74F257AD<SOT109-1 (SO16)|<<http://www.nxp.com/packages/SOT109-1.html<1<week 6
文件頁數(shù): 3/10頁
文件大?。?/td> 89K
代理商: I74F257AD
Philips Semiconductors
Product specification
74F257A
Quad 2-line to 1-line selector/multiplexer, non-inverting
(3-State)
1995 Mar 31
3
LOGIC DIAGRAM
I0a
I1a
I0b
I1b
I0c
I1c
I0d
I1d
OE
S
2
3
5
6
11
10
14
13
15
1
4
7
9
12
Ya
Yb
Yc
Yd
V
= Pin 16
GND = Pin 8
SF00676
FUNCTION TABLE
INPUTS
OUTPUT
OE
S
I0
I1
Y
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
H
L
X
Z
High voltage level
Low voltage level
Don’t care
High impedance “off” state
APPLICATION
SF00677
I0a I1a I0b I1b I0c I1c I0d I1d
Ya
Yb
Yc
Yd
I0a I1a I0b I1b I0c I1c I0d I1d
Ya
Yb
Yc
Yd
I0a I1a I0b I1b I0c I1c I0d I1d
Ya
Yb
Yc
Yd
I0a I1a I0b I1b I0c I1c I0d I1d
Ya
Yb
Yc
Yd
74F257A
74F257A
74F257A
74F257A
4-BIT
DATA
BUS
OE
S
OE
S
OE
S
OE
S
WORD A
WORD B
WORD C
WORD D
WORD E
WORD F
WORD G
WORD H
Y0
Y1
Y2
Y3
74F139
C
B
A
S2
S1
S0
ENABLE
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