參數(shù)資料
型號(hào): 74F846
廠商: NXP Semiconductors N.V.
英文描述: 8-bit bus interface latches, inverting (3-State)(8位總線接口鎖存器,反相(三態(tài)))
中文描述: 8位總線接口龍頭,反相(3態(tài))(8位總線接口鎖存器,反相(三態(tài)))
文件頁數(shù): 8/18頁
文件大?。?/td> 206K
代理商: 74F846
Philips Semiconductors
Product specification
74F841/74F842/74F843/
74F845/74F846
Bus interface latches
1999 Jun 23
8
LOGIC DIAGRAM for 74F845
1
2
23
OE0
OE1
OE2
V
= Pin 24
GND = Pin 12
L
Q
C
D P
Q0
22
13
LE
11
MR
14
PRE
D0
3
L
Q
C
D P
Q1
21
D1
4
L
Q
C
D P
Q2
20
D2
5
L
Q
C
D P
Q3
19
D3
6
L
Q
C
D P
Q4
18
D4
7
L
Q
C
D P
Q5
17
D5
8
L
Q
C
D P
Q6
16
D6
9
L
Q
C
D P
Q7
15
D7
10
SF01301
LOGIC DIAGRAM for 74F846
1
2
23
OE0
OE1
OE2
V
= Pin 24
GND = Pin 12
L
Q
C
D P
Q0
22
13
LE
11
MR
14
PRE
D0
3
L
Q
C
D P
Q1
21
D1
4
L
Q
C
D P
Q2
20
D2
5
L
Q
C
D P
Q3
19
D3
6
L
Q
C
D P
Q4
18
D4
7
L
Q
C
D P
Q5
17
D5
8
L
Q
C
D P
Q6
16
D6
9
L
Q
C
D P
Q7
15
D7
10
SF01302
FUNCTION TABLE for 74F845 and 74F846
INPUTS
OUTPUTS
74F845
74F846
OPERATING MODE
OE
PRE
MR
LE
Dn
Qn
Qn
L
L
X
X
X
H
H
Preset
L
H
L
X
X
L
L
Clear
L
H
H
H
L
L
H
Transparent
L
H
H
H
H
H
L
L
H
H
l
L
H
Latched
L
H
H
h
H
L
H
X
X
X
X
Z
Z
High Impedance
L
High voltage level
Low voltage level
High state one setup time before the High-to-Low LE transition
Low state one setup time before the High-to-Low LE transition
High-to-Low transition
Don’t care
No change
High impedance “off” state
H
H
L
X
NC
NC
Hold
H =
L
h
l
=
X =
NC=
Z =
=
=
=
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