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Part Name
Description
HEF4724 View Datasheet(PDF) - Philips Electronics
Part Name
Description
View to exact match
HEF4724
8-bit addressable latch
Philips Electronics
HEF4724 Datasheet PDF : 7 Pages
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Philips Semiconductors
8-bit addressable latch
Product speciļ¬cation
HEF4724B
MSI
MODE SELECTION
E
CL
MODE
L
L addressable latch
H
L memory
L
H active HIGH 8-channel demultiplexer
H
H clear
FUNCTION TABLE
CL E
HH
HL
HL
HL
HL
HL
HL
HL
HL
LH
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
D
A
0
A
1
A
2
O
0
X
XX
X
L
D
1
L
L
L
D
1
D
1
H
L
L
L
D
1
L
H
L
L
D
1
H
H
L
L
D
1
L
L
H
L
D
1
H
L
H
L
D
1
L
H
H
L
D
1
H
H
H
L
X
X
X
X O
n-1
D
1
L
L
L
D
1
D
1
H
L
L
O
n-1
D
1
L
H
L
O
n-1
D
1
H
H
L
O
n-1
D
1
L
L
H O
n-1
D
1
H
L
H O
n-1
D
1
L
H
H O
n-1
D
1
H
H
H O
n-1
Notes
1. H = HIGH state (the more positive voltage)
L = LOW state (the less positive voltage)
X = state is immaterial
O
n-1
= state before the positive transition of E
D
1
= either HIGH or LOW
O
1
L
L
D
1
L
L
L
L
L
L
O
n-1
O
n-1
D
1
O
n-1
O
n-1
O
n-1
O
n-1
O
n-1
O
n-1
O
2
L
L
L
D
1
L
L
L
L
L
O
n-1
O
n-1
O
n-1
D
1
O
n-1
O
n-1
O
n-1
O
n-1
O
n-1
O
3
L
L
L
L
D
1
L
L
L
L
O
n-1
O
n-1
O
n-1
O
n-1
D
1
O
n-1
O
n-1
O
n-1
O
n-1
O
4
L
L
L
L
L
D
1
L
L
L
O
n-1
O
n-1
O
n-1
O
n-1
O
n-1
D
1
O
n-1
O
n-1
O
n-1
O
5
O
6
O
7
MODE
L L L clear
LLL
LLL
L
L
L
D
1
L
L
O
n-1
O
n-1
O
n-1
O
n-1
O
n-1
O
n-1
D
1
O
n-1
O
n-1
L
L
L
L
D
1
L
O
n-1
O
n-1
O
n-1
O
n-1
O
n-1
O
n-1
O
n-1
D
1
O
n-1
L
L
L
L
L
D
1
O
n-1
O
n-1
O
n-1
O
n-1
O
n-1
O
n-1
O
n-1
O
n-1
D
1
demultiplexer;
unaddressed
latch is
cleared
memory
addressable
latch;
unaddressed
latch holds
previous
state
January 1995
4
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