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74F845 Datasheet(PDF) 8 Page - NXP Semiconductors

Part # 74F845
Description  Bus interface latches
PDF  18 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74F845 Datasheet(HTML) 8 Page - NXP Semiconductors

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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
VCC = Pin 24
GND = Pin 12
LQ
C
DP
Q0
22
13
LE
11
MR
14
PRE
D0
3
LQ
C
DP
Q1
21
D1
4
LQ
C
DP
Q2
20
D2
5
LQ
C
DP
Q3
19
D3
6
LQ
C
DP
Q4
18
D4
7
LQ
C
DP
Q5
17
D5
8
LQ
C
DP
Q6
16
D6
9
LQ
C
DP
Q7
15
D7
10
SF01301
LOGIC DIAGRAM for 74F846
1
2
23
OE0
OE1
OE2
VCC = Pin 24
GND = Pin 12
LQ
C
DP
Q0
22
13
LE
11
MR
14
PRE
D0
3
LQ
C
DP
Q1
21
D1
4
LQ
C
DP
Q2
20
D2
5
LQ
C
DP
Q3
19
D3
6
LQ
C
DP
Q4
18
D4
7
LQ
C
DP
Q5
17
D5
8
LQ
C
DP
Q6
16
D6
9
LQ
C
DP
Q7
15
D7
10
SF01302
FUNCTION TABLE for 74F845 and 74F846
INPUTS
OUTPUTS
INPUTS
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
Transparent
L
H
H
↓
l
L
H
Latched
L
H
H
↓
h
H
L
Latched
H
X
X
X
X
Z
Z
High Impedance
L
H
H
L
X
NC
NC
Hold
H = High voltage level
L
= Low voltage level
h
= High state one setup time before the High-to-Low LE transition
l
= Low state one setup time before the High-to-Low LE transition
↓ = High-to-Low transition
X = Don’t care
NC= No change
Z = High impedance “off” state



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